NAPLEX (North American Pharmacist Licensure) Exam — Questions and Answers

Question 1: Which storage condition is correct for most refrigerated vaccines?

Minus 70 degrees Celsius for all
2 to 8 degrees Celsius (Correct answer)
Room temperature
Frozen at 0 degrees Celsius

Correct answer: 2 to 8 degrees Celsius

Most refrigerated vaccines must be stored between 2 and 8 degrees Celsius.

Question 2: A pharmacy is implementing a new policy for high-alert medications based on Institute for Safe Medication Practices (ISMP) recommendations. Which of the following best describes the procedure for a proper independent double check?

One staff member prepares the medication while a second staff member watches and confirms the steps.
The same staff member prepares the medication and then re-checks their own work after a 15-minute delay.
The pharmacist and technician perform the check together at the same time to reach a consensus.
Two staff members individually and separately perform the check (e.g., calculation, verification) and then compare their results. (Correct answer)

Correct answer: Two staff members individually and separately perform the check (e.g., calculation, verification) and then compare their results.

An independent double check requires two practitioners to separately and independently check the work process. Each person conducts the check alone and apart from the other, and then they compare their results. This method prevents one person's potential error or bias from influencing the other, making it more effective at catching mistakes than checking together or having one person watch another.

Question 3: According to USP <797>, what is the maximum BUD for a low-risk compounded sterile preparation stored at room temperature?

30 days
6 hours
48 hours (Correct answer)
14 days

Correct answer: 48 hours

Low-risk CSPs may be stored at controlled room temperature for up to 48 hours under traditional <797> default BUDs.

Question 4: A pharmacist must compound a 1:10,000 epinephrine solution. How many grams of epinephrine are in 500 mL of this solution?

0.5 g
5 g
0.05 g (Correct answer)
0.005 g

Correct answer: 0.05 g

A 1:10,000 ratio equals 1 g per 10,000 mL, so 500 mL contains 0.05 g.

Question 5: A patient on a medical-surgical unit experienced a severe hypoglycemic event. A root cause analysis (RCA) revealed the patient received glipizide instead of glyburide, which had been ordered. The investigation found that the two drugs were stored in adjacent bins in the automated dispensing cabinet (ADC) on the nursing unit. Which of the following interventions represents the strongest system-based change to prevent this error from recurring?

Requiring two nurses to verify all sulfonylurea administrations.
Implementing barcode scanning for medication removal from the ADC and at the bedside. (Correct answer)
Educating all nursing staff on the differences between glipizide and glyburide during the next staff meeting.
Placing a high-alert warning sticker on the glyburide and glipizide bins.

Correct answer: Implementing barcode scanning for medication removal from the ADC and at the bedside.

While education, warnings, and double-checks are helpful, the strongest system-based intervention is one that uses a forcing function or technology to prevent the error. Implementing barcode scanning at two key points—when removing the medication from the ADC and before administration at the bedside—creates an automated check that verifies the drug against the patient's electronic medication administration record (eMAR). This is more reliable and less prone to human error than manual checks, warning labels, or education alone.

Question 6: Statins lower cholesterol by inhibiting which enzyme?

Lipoprotein lipase
HMG-CoA reductase (Correct answer)
Squalene synthase
PCSK9

Correct answer: HMG-CoA reductase

Statins competitively inhibit HMG-CoA reductase, the rate-limiting enzyme of cholesterol synthesis.

Question 7: Jen is an 75-year-old woman who is undergoing back surgery. Her height is 5 feet 4 inches, her weight is 85 kg, and NKDA. Hypertension, diabetes, serious depression, hypothyroidism, and persistent back pain are among her former medical conditions. Jen's post-op medications include Dexamethasone 8mg iv q6h with taper dose, Ondansetron 4mg iv q6h prn for N/V, and Ondansetron 4mg iv q6h prn for N/V. Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20m, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dosage 0.1mg, metoclopramide 10mg iv q6h, metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg Lockout every 6 minutes, with a one-hour limit of 2.2 mg/hr. Morning labs include serum creatinine 1.4 mg/dl, magnesium 1.5 mg/dl, potassium 5.0 mmol/L, and sodium 135 mmol/L. What is the rationale behind delaying metformin treatment in patients with impaired renal function?

Metformin can build up neurotoxin
Metformin can cause hyperglycemia
Metformin can cause lactic acidosis (Correct answer)
Metformin can cause hyperkalemia

Correct answer: Metformin can cause lactic acidosis

Metformin is primarily excreted by the kidneys, and in patients with impaired renal function, it can accumulate to toxic levels. This accumulation significantly increases the risk of lactic acidosis, a rare but severe and potentially fatal metabolic complication. Therefore, metformin is contraindicated or requires dose adjustment in patients with significant renal impairment to prevent this life-threatening adverse effect.

Question 8: What should a patient be counseled about when starting an ACE inhibitor like lisinopril?

Take potassium supplements routinely
A persistent dry cough may occur and should be reported (Correct answer)
It must be taken with grapefruit
It commonly causes hyperglycemia

Correct answer: A persistent dry cough may occur and should be reported

A dry cough is a recognized ACE inhibitor side effect that may prompt a switch to an ARB.

Question 9: Which empiric antibiotic regimen is most appropriate for an otherwise healthy adult outpatient with community-acquired pneumonia and no comorbidities or recent antibiotics?

IV ceftriaxone plus azithromycin
Amoxicillin or doxycycline (Correct answer)
Ciprofloxacin alone
Vancomycin plus cefepime

Correct answer: Amoxicillin or doxycycline

Healthy outpatients with CAP and no comorbidities can be treated with amoxicillin or doxycycline monotherapy.

Question 10: Which mechanism explains the action of direct oral anticoagulant apixaban?

Direct thrombin (factor IIa) inhibition
Direct factor Xa inhibition (Correct answer)
Antithrombin III potentiation
Vitamin K antagonism

Correct answer: Direct factor Xa inhibition

Apixaban directly and reversibly inhibits factor Xa.

Question 11: An order is written for 25 mEq of potassium chloride (KCl) to be added to a 1 L bag of 0.9% NaCl. The pharmacy has a stock vial of KCl 2 mEq/mL. How many milliliters of the stock solution must be added to the bag? (MW of K=39, Cl=74.5)

10 mL
12.5 mL (Correct answer)
25 mL
15 mL

Correct answer: 12.5 mL

This is a direct dosage calculation. The desired dose is 25 mEq of KCl. The available concentration is 2 mEq/mL. To find the required volume, divide the desired dose by the concentration: 25 mEq / 2 mEq/mL = 12.5 mL. The molecular weights are extra, unneeded information.

Question 12: A pharmacist is preparing a powdered formulation and needs to reduce the particle size of a coarse, crystalline substance to create a fine, uniform powder. Which non-sterile compounding technique best describes this process?

Levigation
Eutectic mixing
Spatulation
Trituration (Correct answer)

Correct answer: Trituration

Trituration is the process of rubbing, grinding, or pulverizing a powder to reduce its particle size. This is typically done in a mortar with a pestle. Levigation involves reducing particle size by triturating it in a mortar or on an ointment slab with a small amount of a liquid in which the solid is not soluble. Spatulation is the blending of powders with a spatula, and eutectic mixing refers to the liquefaction of two solids when mixed together.

Question 13: A patient taking a nonselective MAOI consumes aged cheese. What mechanism underlies the resulting hypertensive crisis?

Tyramine accumulation triggers massive norepinephrine release (Correct answer)
Increased renin and aldosterone secretion
Direct vasoconstriction by dietary tyrosine
Angiotensin II receptor hypersensitivity

Correct answer: Tyramine accumulation triggers massive norepinephrine release

MAOIs block intestinal and hepatic monoamine oxidase, preventing first-pass tyramine metabolism; absorbed tyramine displaces norepinephrine from sympathetic nerve terminals, causing massive catecholamine release and hypertensive crisis.

Question 14: A patient on digoxin presents with nausea, visual halos, and a level of 2.8 ng/mL. What is the best action?

Hold digoxin and check potassium (Correct answer)
Add a beta blocker
Increase the digoxin dose
Continue and recheck in a month

Correct answer: Hold digoxin and check potassium

Digoxin toxicity (level >2 ng/mL with symptoms) requires holding the drug and assessing potassium.

Question 15: Which immunization is recommended for an unvaccinated adult traveling to an area with endemic hepatitis A?

Tdap only
Hepatitis A vaccine (Correct answer)
MMR booster
Zoster vaccine

Correct answer: Hepatitis A vaccine

Hepatitis A vaccine is recommended for travelers to endemic regions.

Question 16: Phenytoin exerts its antiseizure effect mainly by:

Blocking voltage-gated sodium channels (Correct answer)
Blocking T-type calcium channels
Antagonizing NMDA receptors
Enhancing GABA-A chloride influx

Correct answer: Blocking voltage-gated sodium channels

Phenytoin stabilizes inactivated sodium channels, reducing repetitive neuronal firing.

Question 17: Nondihydropyridine calcium channel blockers (e.g., diltiazem) differ from dihydropyridines by:

No effect on the AV node
Greater effect on cardiac conduction and rate (Correct answer)
Selective venodilation
Greater peripheral vasodilation only

Correct answer: Greater effect on cardiac conduction and rate

Nondihydropyridines act more on cardiac nodal tissue, slowing AV conduction and heart rate.

Question 18: A patient prescribed oral iron supplements should be counseled to expect which common effect?

Permanent tooth loss
Bright red urine
Dark or black stools and possible constipation (Correct answer)
Severe hair growth

Correct answer: Dark or black stools and possible constipation

Oral iron commonly darkens the stool and may cause constipation.

Question 19: The primary mechanism of proton pump inhibitors is:

Irreversible inhibition of gastric H+/K+ ATPase (Correct answer)
Muscarinic M1 antagonism
H2 receptor blockade
Neutralization of gastric acid

Correct answer: Irreversible inhibition of gastric H+/K+ ATPase

PPIs irreversibly block the parietal cell H+/K+ ATPase proton pump.

Question 20: A technician needs to accurately measure 8 mL of glycerin, a viscous liquid, for a non-sterile compound. Which piece of equipment would provide the most accurate measurement?

A 10 mL beaker
A 25 mL graduated cylinder
A 10 mL oral syringe (Correct answer)
A 50 mL conical graduate

Correct answer: A 10 mL oral syringe

For measuring viscous liquids like glycerin, a syringe is more accurate than a graduated cylinder. Because glycerin is thick, a significant amount can cling to the inner surface of a graduated cylinder, leading to an inaccurate volume being delivered. An oral syringe allows for the complete and forceful expulsion of the liquid, ensuring a more accurate volume is transferred. Beakers and conical graduates are less accurate for measuring small volumes.

Question 21: Which monitoring parameter is most important to establish at baseline before starting amiodarone for chronic atrial fibrillation?

Serum potassium only
Thyroid, liver, and pulmonary function tests (Correct answer)
Fasting lipid panel
Bone density scan

Correct answer: Thyroid, liver, and pulmonary function tests

Amiodarone can cause thyroid, hepatic, and pulmonary toxicity, so baseline TFTs, LFTs, and pulmonary function are required.

Question 22: A patient on warfarin starts amiodarone; what is the expected interaction?

Decreased INR from enzyme induction
No interaction
Decreased warfarin absorption
Increased INR from CYP2C9/CYP3A4 inhibition (Correct answer)

Correct answer: Increased INR from CYP2C9/CYP3A4 inhibition

Amiodarone inhibits CYP2C9 and CYP3A4, raising warfarin levels and INR.

Question 23: A patient stabilized on an SSRI is prescribed tramadol for acute pain. Which serious adverse reaction is most likely to result from this combination?

Neuroleptic malignant syndrome
Extrapyramidal effects
Anticholinergic toxicity
Serotonin syndrome (Correct answer)

Correct answer: Serotonin syndrome

Both SSRIs and tramadol increase serotonergic activity, and their concurrent use can precipitate serotonin syndrome characterized by hyperthermia, autonomic instability, and neuromuscular abnormalities.

Question 24: A prescription for a pediatric patient weighing 44 lbs is for amoxicillin 30 mg/kg/day, divided into two daily doses. The pharmacy has amoxicillin oral suspension with a concentration of 250 mg/5 mL. How many mL should be dispensed for each dose?

6 mL (Correct answer)
7.5 mL
15 mL
12 mL

Correct answer: 6 mL

First, convert the patient's weight from pounds to kilograms: 44 lbs / 2.2 lbs/kg = 20 kg. Next, calculate the total daily dose in mg: 20 kg * 30 mg/kg/day = 600 mg/day. Since the dose is divided into two daily doses, each dose is 600 mg / 2 = 300 mg. Finally, calculate the volume in mL for each dose using the suspension's concentration: (300 mg / 250 mg) * 5 mL = 6 mL.

Question 25: A patient with heart failure with reduced ejection fraction (HFrEF) is on lisinopril and metoprolol succinate. Which addition best aligns with guideline-directed medical therapy?

Verapamil
Diltiazem
Flecainide
A mineralocorticoid receptor antagonist such as spironolactone (Correct answer)

Correct answer: A mineralocorticoid receptor antagonist such as spironolactone

Adding an MRA improves survival in HFrEF and is a core pillar of guideline-directed therapy.

Question 26: While reviewing a patient's profile, a pharmacist notices that a 45-year-old male with hypertension has been refilling his lisinopril prescription every 40-45 days, despite it being a 30-day supply. What is the most appropriate initial action for the pharmacist to take?

Call the prescriber to report the patient's non-adherence.
Refuse to refill the prescription until the patient explains the delay.
Ask the patient in a non-judgmental, open-ended way, "I noticed it's been a little while since your last refill, how have you been taking your medication?" (Correct answer)
Inform the patient that his blood pressure will not be controlled if he continues this pattern.

Correct answer: Ask the patient in a non-judgmental, open-ended way, "I noticed it's been a little while since your last refill, how have you been taking your medication?"

The best initial approach to suspected non-adherence is to use open-ended, non-judgmental communication to gather information. Asking an exploratory question like this opens a dialogue, allowing the patient to share potential barriers (e.g., side effects, cost, forgetfulness) without feeling accused. Calling the prescriber or making a threatening statement is premature and can damage the pharmacist-patient relationship. Refusing the refill is inappropriate and punitive.

Question 27: A patient on warfarin presents with an INR of 6.5 and no bleeding. What is the most appropriate management?

Increase the warfarin dose
Transfuse fresh frozen plasma immediately
Hold warfarin and consider low-dose oral vitamin K (Correct answer)
Administer IV vitamin K and 4-factor PCC

Correct answer: Hold warfarin and consider low-dose oral vitamin K

For an elevated INR without bleeding, holding warfarin with possible low-dose oral vitamin K is appropriate; aggressive reversal is reserved for serious bleeding.

Question 28: A patient who was recently started on lisinopril for hypertension develops a persistent, non-productive cough. This adverse effect is primarily attributed to the accumulation of which substance in the respiratory tract?

Aldosterone
Histamine
Angiotensin II
Bradykinin (Correct answer)

Correct answer: Bradykinin

Angiotensin-converting enzyme (ACE) is responsible for both converting angiotensin I to angiotensin II and for breaking down bradykinin. By inhibiting ACE, lisinopril causes an accumulation of bradykinin. Elevated levels of bradykinin in the lungs can irritate cough receptors and stimulate the cough reflex, leading to the characteristic dry, non-productive cough associated with this drug class.

Question 29: Which counseling statement is correct for a patient taking sublingual or oral spironolactone?

Use salt substitutes liberally
Avoid potassium supplements and high-potassium salt substitutes (Correct answer)
It causes severe potassium loss
Take double doses if you miss one

Correct answer: Avoid potassium supplements and high-potassium salt substitutes

Spironolactone is potassium-sparing, so added potassium can cause hyperkalemia.

Question 30: Which antituberculosis agent most commonly causes peripheral neuropathy that can be prevented with pyridoxine supplementation?

Rifampin
Ethambutol
Pyrazinamide
Isoniazid (Correct answer)

Correct answer: Isoniazid

Isoniazid competitively inhibits pyridoxine phosphorylation, creating a functional vitamin B6 deficiency that impairs myelin synthesis and causes peripheral neuropathy; coadministration of pyridoxine 25–50 mg/day prevents this adverse effect.

Question 31: Which opioid is also an NMDA receptor antagonist, useful in neuropathic pain?

Methadone (Correct answer)
Codeine
Hydromorphone
Morphine

Correct answer: Methadone

Methadone provides mu-opioid agonism plus NMDA antagonism.

Question 32: Which neurotransmitter system do SSRIs primarily modulate?

Norepinephrine release
Serotonin reuptake at the presynaptic transporter (Correct answer)
Dopamine receptor blockade
GABA receptor agonism

Correct answer: Serotonin reuptake at the presynaptic transporter

SSRIs block the serotonin transporter (SERT), increasing synaptic serotonin.

Question 33: Which is the most important counseling point for a patient using insulin glargine?

Shake the vial vigorously before use
It works within 5 minutes
It is long-acting and should not be mixed with other insulins in the same syringe (Correct answer)
It is a rapid-acting insulin taken with meals

Correct answer: It is long-acting and should not be mixed with other insulins in the same syringe

Glargine is a long-acting basal insulin that should not be mixed with other insulins.

Question 34: According to USP <797>, the primary engineering control (PEC), such as a laminar airflow workbench or biological safety cabinet, must maintain which minimum ISO Class air quality in the direct compounding area?

ISO Class 8
ISO Class 7
ISO Class 5 (Correct answer)
ISO Class 6

Correct answer: ISO Class 5

USP <797> requires that the direct compounding area within a primary engineering control (PEC) must maintain ISO Class 5 air quality to protect critical sites from contamination. ISO Class 7 is the standard for the buffer area, and ISO Class 8 is the standard for the ante-area.

Question 35: Which drug class can cause hyperkalemia due to aldosterone antagonism?

Loop diuretics
Potassium-sparing diuretics (Correct answer)
Thiazide diuretics
Carbonic anhydrase inhibitors

Correct answer: Potassium-sparing diuretics

Spironolactone and similar agents block aldosterone, retaining potassium.

Question 36: Which is appropriate counseling for a patient prescribed sumatriptan for migraines?

It treats tension headaches only
Use it daily to prevent all headaches
Take at the onset of a migraine; do not exceed recommended doses (Correct answer)
Combine freely with other triptans or ergots

Correct answer: Take at the onset of a migraine; do not exceed recommended doses

Triptans are used acutely at migraine onset with dosing limits to avoid serotonin and cardiovascular risks.

Question 37: What best describes the action of sacubitril in sacubitril/valsartan?

ACE inhibition
Beta-1 receptor blockade
Neprilysin inhibition increasing natriuretic peptides (Correct answer)
Aldosterone receptor antagonism

Correct answer: Neprilysin inhibition increasing natriuretic peptides

Sacubitril inhibits neprilysin, raising beneficial natriuretic peptide levels.

Question 38: Which order of garbing is correct when entering a sterile compounding area?

Gown first, then mask, then shoe covers
Shoe covers, head/facial covers, mask, then hand hygiene and gown (Correct answer)
Hand hygiene last after gloving
Sterile gloves first, then gown

Correct answer: Shoe covers, head/facial covers, mask, then hand hygiene and gown

Garbing proceeds from dirtiest to cleanest: shoe covers, then head and facial hair covers and mask, followed by hand hygiene and the gown.

Question 39: A patient with generalized anxiety disorder needs long-term pharmacotherapy. Which is the preferred first-line option?

Diphenhydramine
Alprazolam scheduled daily
Hydroxyzine as monotherapy long-term
An SSRI such as escitalopram (Correct answer)

Correct answer: An SSRI such as escitalopram

SSRIs are first-line for long-term GAD management, whereas benzodiazepines are avoided for chronic use due to dependence risk.

Question 40: A 42-year-old landscaper sustains a deep puncture wound from a garden tool contaminated with soil. He believes he had a tetanus shot about 12 years ago but is unsure and has no records. According to ACIP guidelines for wound management, which course of action is most appropriate?

Administer Tetanus Immune Globulin (TIG) only.
Administer Tdap vaccine only.
Administer both Tdap vaccine and Tetanus Immune Globulin (TIG). (Correct answer)
Clean the wound and recommend a Tdap vaccine within 7 days.

Correct answer: Administer both Tdap vaccine and Tetanus Immune Globulin (TIG).

For a wound that is not clean and minor in a patient with an unknown or incomplete (<3 doses) tetanus vaccination history, ACIP recommends administering both a tetanus toxoid-containing vaccine (Tdap is preferred) and Tetanus Immune Globulin (TIG). Tdap provides active immunity, while TIG provides immediate passive immunity. Administering only one of the two would be insufficient for this high-risk situation.

Question 41: Dabigatran differs from apixaban in that it:

Inhibits factor Xa
Requires antithrombin as a cofactor
Directly inhibits thrombin (IIa) (Correct answer)
Antagonizes vitamin K

Correct answer: Directly inhibits thrombin (IIa)

Dabigatran is a direct thrombin inhibitor, reversed by idarucizumab.

Question 42: Which counseling point is appropriate for a patient prescribed nitroglycerin sublingual tablets for angina?

Swallow the tablet whole with water
Take three tablets at once at first symptom
Store tablets in a weekly pill organizer
Place under the tongue and call 911 if pain persists after the first dose (Correct answer)

Correct answer: Place under the tongue and call 911 if pain persists after the first dose

Current guidance is to take one dose and call emergency services if chest pain is not relieved.

Question 43: Which drug's toxicity is treated with N-acetylcysteine?

Aspirin
Digoxin
Acetaminophen (Correct answer)
Heparin

Correct answer: Acetaminophen

N-acetylcysteine replenishes glutathione to detoxify acetaminophen's NAPQI metabolite.

Question 44: A patient with gastroesophageal reflux disease (GERD) is prescribed omeprazole. This drug provides symptom relief primarily by which of the following mechanisms?

Irreversibly inhibiting the H+/K+ ATPase pump in parietal cells (Correct answer)
Blocking histamine H2-receptors on parietal cells
Forming a protective barrier over the gastric mucosa
Neutralizing existing stomach acid

Correct answer: Irreversibly inhibiting the H+/K+ ATPase pump in parietal cells

Omeprazole is a proton pump inhibitor (PPI) that specifically and irreversibly blocks the H+/K+ ATPase enzyme system (the 'proton pump') on the secretory surface of gastric parietal cells. This action inhibits the final step in gastric acid production.

Question 45: The antidote for benzodiazepine overdose is:

N-acetylcysteine
Atropine
Flumazenil (Correct answer)
Naloxone

Correct answer: Flumazenil

Flumazenil is a competitive GABA-A benzodiazepine receptor antagonist.

Question 46: A 58-year-old male with newly diagnosed type 2 diabetes mellitus is started on metformin. Which of the following best describes the primary mechanism by which metformin exerts its antihyperglycemic effect?

It inhibits the dipeptidyl peptidase-4 (DPP-4) enzyme, increasing incretin levels.
It acts as a secretagogue, stimulating insulin release from pancreatic beta cells.
Activation of AMP-activated protein kinase (AMPK), leading to decreased hepatic gluconeogenesis. (Correct answer)
It acts as a sodium-glucose cotransporter-2 (SGLT2) inhibitor in the proximal renal tubules.

Correct answer: Activation of AMP-activated protein kinase (AMPK), leading to decreased hepatic gluconeogenesis.

Metformin's principal effect is to decrease hepatic glucose production (gluconeogenesis). It achieves this primarily by activating the enzyme AMP-activated protein kinase (AMPK) in the liver. It also increases insulin sensitivity in peripheral tissues and decreases intestinal glucose absorption, but the reduction of hepatic gluconeogenesis is its main mechanism.

Question 47: Which drug class inhibits the breakdown of incretins to lower blood glucose?

Thiazolidinediones
Biguanides
Sulfonylureas
DPP-4 inhibitors (e.g., sitagliptin) (Correct answer)

Correct answer: DPP-4 inhibitors (e.g., sitagliptin)

DPP-4 inhibitors prevent degradation of GLP-1 and GIP, prolonging incretin effects.

Question 48: A patient on phenytoin reports gum overgrowth. This adverse effect is known as:

Aplastic anemia
Stevens-Johnson syndrome
Photosensitivity
Gingival hyperplasia (Correct answer)

Correct answer: Gingival hyperplasia

Gingival hyperplasia is a classic phenytoin adverse effect managed with good oral hygiene.

Question 49: Heparin produces anticoagulation primarily by:

Inhibiting vitamin K epoxide reductase
Blocking platelet GP IIb/IIIa
Directly inhibiting thrombin without a cofactor
Enhancing antithrombin III activity (Correct answer)

Correct answer: Enhancing antithrombin III activity

Unfractionated heparin potentiates antithrombin III, which inactivates thrombin and factor Xa.

Question 50: Which counseling point is most important for a patient starting digoxin?

Ignore nausea and visual changes
Avoid all potassium-containing foods
Take extra doses if heart feels slow
Report nausea, vomiting, or visual disturbances as possible toxicity (Correct answer)

Correct answer: Report nausea, vomiting, or visual disturbances as possible toxicity

Nausea, vomiting, and yellow-green vision changes can signal digoxin toxicity.

Question 51: A patient with gout has 3 attacks per year and a serum urate of 9 mg/dL. After acute treatment, what is the appropriate long-term plan?

Use colchicine only during attacks indefinitely
Start probenecid in a patient with nephrolithiasis
Start allopurinol with a urate target below 6 mg/dL (Correct answer)
Avoid all urate-lowering therapy

Correct answer: Start allopurinol with a urate target below 6 mg/dL

Recurrent gout with elevated urate warrants urate-lowering therapy such as allopurinol titrated to a target below 6 mg/dL.

Question 52: A hospital is installing new profile-driven automated dispensing cabinets (ADCs) on all nursing floors. A key safety feature of this system is that a nurse can only access medications that have been reviewed and verified by a pharmacist for a specific patient. This feature is primarily designed to prevent which type of medication error?

Wrong dosage form error
Unauthorized medication error (Correct answer)
Wrong time error
Wrong patient error

Correct answer: Unauthorized medication error

Profile-driven ADCs link the cabinet's inventory to the pharmacy's information system. When a pharmacist verifies a medication order for a patient, that medication is added to the patient's electronic 'profile.' The ADC will then only allow a nurse to withdraw medications that are currently on that patient's active profile. This process prevents nurses from withdrawing a drug that has not been ordered, has been discontinued, or has not yet been approved by a pharmacist, which is best described as an unauthorized medication error.

Question 53: A 34-year-old patient is diagnosed with generalized anxiety disorder (GAD) and is seeking pharmacotherapy. The patient has no other medical conditions and takes no other medications. Which of the following medication classes is considered first-line treatment for this condition?

Benzodiazepines
Tricyclic Antidepressants (TCAs)
Selective Serotonin Reuptake Inhibitors (SSRIs) (Correct answer)
Antipsychotics

Correct answer: Selective Serotonin Reuptake Inhibitors (SSRIs)

According to major treatment guidelines, Selective Serotonin Reuptake Inhibitors (SSRIs) and Serotonin-Norepinephrine Reuptake Inhibitors (SNRIs) are the first-line medication treatments for generalized anxiety disorder. They are effective and generally well-tolerated for long-term use. While benzodiazepines are effective for short-term symptom relief, they are not recommended as first-line therapy due to risks of dependence and tolerance. TCAs and antipsychotics are typically reserved for treatment-resistant cases.

Question 54: A patient prescribed an albuterol rescue inhaler should be counseled that it is used for what?

Quick relief of acute bronchospasm symptoms (Correct answer)
Daily long-term control regardless of symptoms
Prevention of all asthma at night only
Treating bacterial pneumonia

Correct answer: Quick relief of acute bronchospasm symptoms

Albuterol is a short-acting beta-agonist used for rapid symptom relief.

Question 55: Which drug class works by irreversibly inhibiting the proton pump (H+/K+ ATPase)?

Prostaglandin analogs
Proton pump inhibitors (Correct answer)
Antacids
H2-receptor antagonists

Correct answer: Proton pump inhibitors

PPIs covalently bind and irreversibly inhibit gastric H+/K+ ATPase.

Question 56: A hospital's Pharmacy and Therapeutics (P&T) committee is updating its list of approved 'Tall Man Lettering' conventions to reduce medication errors. Which of the following pairs correctly uses this technique according to ISMP/FDA recommendations?

MetformiN and MetoproloL
AmloDIPINE and LisinoPRIL
HYDROcodone and Oxycodone
predniSONE and prednisoLONE (Correct answer)

Correct answer: predniSONE and prednisoLONE

Tall Man Lettering is a safety strategy that uses a mix of uppercase and lowercase letters to draw attention to the dissimilarities in look-alike drug names. The FDA and ISMP have established official lists of recommended name pairs. Among the choices, 'predniSONE' and 'prednisoLONE' is a well-established pair on these lists designed to prevent mix-ups. The other options either do not represent common look-alike pairs or do not use the standard lettering convention.

Question 57: A patient is to receive an IV infusion of 0.9% NaCl with 20 mEq of KCl over 8 hours. The total volume of the IV bag is 1000 mL. The IV administration set delivers 15 gtt/mL. What is the correct flow rate in drops per minute (gtt/min)?

21 gtt/min
15 gtt/min
31 gtt/min (Correct answer)
125 gtt/min

Correct answer: 31 gtt/min

First, calculate the flow rate in mL/hr: 1000 mL / 8 hours = 125 mL/hr. Next, convert mL/hr to mL/min: 125 mL / 60 min = 2.083 mL/min. Finally, use the administration set's drop factor to find the rate in gtt/min: 2.083 mL/min * 15 gtt/mL = 31.25 gtt/min. Rounding to the nearest whole number gives 31 gtt/min.

Question 58: A pharmacist is counseling a 19-year-old female patient who is picking up her first prescription for isotretinoin. According to the iPLEDGE REMS program, which of the following is an absolute requirement that must be communicated?

The patient must not donate blood during therapy and for one month after stopping.
The patient must use two forms of effective contraception simultaneously or commit to continuous abstinence. (Correct answer)
The patient must report any signs of depression or mood changes immediately.
The patient should avoid excessive sun exposure and use a broad-spectrum sunscreen.

Correct answer: The patient must use two forms of effective contraception simultaneously or commit to continuous abstinence.

The primary goal of the iPLEDGE REMS program is to prevent fetal exposure to isotretinoin due to its severe teratogenicity. Therefore, the most critical counseling point for a female patient who can become pregnant is the mandatory requirement to use two forms of effective contraception simultaneously (or to be abstinent) for one month before, during, and one month after therapy. The other points are important safety warnings but are not the central focus of the REMS program.

Question 59: Jen is an 75-year-old woman who is undergoing back surgery. Her height is 5 feet 4 inches, her weight is 85 kg, and NKDA. Hypertension, diabetes, serious depression, hypothyroidism, and persistent back pain are among her former medical conditions. Jen's post-op medications include Dexamethasone 8mg iv q6h with taper dose, Ondansetron 4mg iv q6h prn for N/V, and Ondansetron 4mg iv q6h prn for N/V. Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20m, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dosage 0.1mg, metoclopramide 10mg iv q6h, metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg Lockout every 6 minutes, with a one-hour limit of 2.2 mg/hr. Morning labs include serum creatinine 1.4 mg/dl, magnesium 1.5 mg/dl, potassium 5.0 mmol/L, and sodium 135 mmol/L. Which of the following medications has the potential to induce substantial QT prolongation?

Metformin
Citalopram (Correct answer)
Hydromorphone
Lisinopril

Correct answer: Citalopram

Citalopram, an antidepressant belonging to the selective serotonin reuptake inhibitor (SSRI) class, is known to cause dose-dependent QT prolongation. This effect can increase the risk of serious ventricular arrhythmias, including Torsades de Pointes. Due to this cardiac risk, citalopram has specific dosing recommendations and precautions, especially in patients with pre-existing cardiac conditions or those taking other QT-prolonging drugs.

Question 60: A laminar airflow workbench (LAFW) directs HEPA-filtered air in which primary direction during sterile compounding?

Toward the back of the hood
Horizontally toward the compounder (Correct answer)
In a turbulent mixing pattern
Downward over the work surface

Correct answer: Horizontally toward the compounder

A horizontal LAFW pushes HEPA-filtered air horizontally from the back toward the operator across the work surface.

Question 61: A patient is prescribed clopidogrel after having a coronary artery stent placed. Which of the following is the primary mechanism by which clopidogrel exerts its antiplatelet effect?

Inhibition of the cyclooxygenase-1 (COX-1) enzyme
Irreversible inhibition of the P2Y12 ADP receptor on platelets (Correct answer)
Reversible antagonism of the protease-activated receptor-1 (PAR-1)
Blockade of the glycoprotein IIb/IIIa receptor

Correct answer: Irreversible inhibition of the P2Y12 ADP receptor on platelets

Clopidogrel is a prodrug whose active metabolite irreversibly binds to the P2Y12 class of ADP receptors on the platelet surface. This binding prevents ADP from activating the platelets, thereby inhibiting platelet aggregation for the life of the platelet.

Question 62: Which counseling point is correct for a patient prescribed levothyroxine?

Take at bedtime with a calcium supplement
Take on an empty stomach, typically 30-60 minutes before breakfast (Correct answer)
Take only when feeling tired
Take with breakfast and coffee

Correct answer: Take on an empty stomach, typically 30-60 minutes before breakfast

Levothyroxine absorption is best on an empty stomach, separated from food and certain minerals.

Question 63: Per USP <797>, the buffer area (where the PEC sits) should maintain what minimum ISO classification?

ISO Class 7 (Correct answer)
ISO Class 8
ISO Class 6
ISO Class 5

Correct answer: ISO Class 7

The buffer area housing the primary engineering control must be at least ISO Class 7.

Question 64: A type 2 diabetic with an A1c of 9.2% on metformin alone and a history of heart failure should add which agent for best cardiovascular benefit?

Sitagliptin
Glipizide
Pioglitazone
Empagliflozin (Correct answer)

Correct answer: Empagliflozin

SGLT2 inhibitors like empagliflozin reduce heart failure hospitalizations and are preferred in diabetics with HF.

Question 65: A patient on long-term high-dose inhaled corticosteroids reports recurrent oral thrush. What counseling point best addresses this?

Stop the inhaled corticosteroid permanently
Double the corticosteroid dose
Rinse and spit with water after each inhalation (Correct answer)
Take the inhaler only at bedtime

Correct answer: Rinse and spit with water after each inhalation

Rinsing the mouth after inhaled corticosteroid use reduces local drug deposition and prevents oral candidiasis.

Question 66: The antiplatelet effect of clopidogrel requires which step?

Inhibition of cyclooxygenase-1
Direct reversible binding to P2Y12
CYP2C19 activation to its active metabolite (Correct answer)
Conversion by gut bacteria

Correct answer: CYP2C19 activation to its active metabolite

Clopidogrel is a prodrug activated mainly by CYP2C19; poor metabolizers respond less.

Question 67: According to the 2017 ACC/AHA High Blood Pressure Clinical Practice Guideline, which of the following is the most appropriate first-line medication choice for a 58-year-old Black male newly diagnosed with Stage 1 hypertension and no other comorbidities?

Hydrochlorothiazide (Correct answer)
Lisinopril
Losartan
Atenolol

Correct answer: Hydrochlorothiazide

The 2017 ACC/AHA guidelines recommend either a thiazide-type diuretic or a calcium channel blocker as first-line monotherapy for hypertension in Black adults without heart failure or chronic kidney disease. ACE inhibitors (like lisinopril) and ARBs (like losartan) have been shown to be less effective in lowering blood pressure in this population when used as monotherapy. Beta-blockers like atenolol are no longer recommended as initial therapy for hypertension unless the patient has specific comorbidities like ischemic heart disease or heart failure.

Question 68: A patient is brought to the emergency department with respiratory depression following a suspected heroin overdose. The administration of naloxone rapidly improves the patient's breathing. What is the mechanism of action of naloxone?

It is a competitive antagonist at opioid receptors (Correct answer)
It acts as a partial agonist at the mu-opioid receptor
It stimulates the respiratory center in the medulla
It metabolizes opioids into inactive compounds

Correct answer: It is a competitive antagonist at opioid receptors

Naloxone is a competitive opioid receptor antagonist. It has a high affinity for opioid receptors, particularly the mu-receptor, and displaces opioids that are already bound, thereby reversing their effects, including respiratory depression.

Question 69: A patient on an SSRI should be counseled that full therapeutic effect typically occurs after how long?

After 4 to 6 weeks (Correct answer)
Within 1 day
Within a few hours
Only after 6 months

Correct answer: After 4 to 6 weeks

Antidepressant effects of SSRIs generally take several weeks to develop fully.

Question 70: A patient starting isotretinoin must be counseled about which critical requirement?

Stop sunscreen use
Take with high-fat alcohol
Strict pregnancy prevention due to teratogenicity (iPLEDGE) (Correct answer)
No need for any pregnancy precautions

Correct answer: Strict pregnancy prevention due to teratogenicity (iPLEDGE)

Isotretinoin is highly teratogenic and requires the iPLEDGE program with strict contraception.

Question 71: Which mechanism describes the action of allopurinol in gout?

Increasing renal uric acid excretion
Inhibiting cyclooxygenase
Inhibiting leukocyte migration
Inhibition of xanthine oxidase reducing uric acid production (Correct answer)

Correct answer: Inhibition of xanthine oxidase reducing uric acid production

Allopurinol inhibits xanthine oxidase, lowering uric acid synthesis.

Question 72: Which antibiotic mechanism is associated with inhibition of the 50S ribosomal subunit?

Aminoglycosides such as gentamicin
Macrolides such as azithromycin (Correct answer)
Fluoroquinolones such as ciprofloxacin
Beta-lactams such as amoxicillin

Correct answer: Macrolides such as azithromycin

Macrolides bind the 50S subunit to block bacterial protein synthesis.

Question 73: When counseling a patient on the proper use of a new albuterol metered-dose inhaler (MDI), which of the following steps is most frequently performed incorrectly by patients and should be a point of emphasis?

Failing to shake the inhaler well before each use.
Neglecting to rinse their mouth out with water after use.
Not coordinating a slow, deep breath with pressing the canister. (Correct answer)
Forgetting to wash the plastic actuator weekly.

Correct answer: Not coordinating a slow, deep breath with pressing the canister.

Studies show that one of the most common and critical errors in MDI technique is poor coordination between actuating (pressing) the canister and starting a slow, deep inhalation. This leads to the medication impacting the back of the throat instead of reaching the lungs. While shaking the inhaler is important and rinsing the mouth is vital for inhaled corticosteroids, poor timing of the breath is a more frequent cause of treatment failure for rescue inhalers like albuterol.

Question 74: ACE inhibitors cause cough primarily due to accumulation of:

Angiotensin II
Bradykinin (Correct answer)
Aldosterone
Renin

Correct answer: Bradykinin

ACE also degrades bradykinin; its buildup triggers the characteristic dry cough.

Question 75: A patient with a history of bilateral renal artery stenosis presents with newly diagnosed hypertension. Which antihypertensive class is most likely to precipitate acute renal failure in this patient?

ACE inhibitors (Correct answer)
Dihydropyridine calcium channel blockers
Thiazide diuretics
Beta-1 selective beta-blockers

Correct answer: ACE inhibitors

In bilateral renal artery stenosis, perfusion of both kidneys depends on angiotensin II–mediated efferent arteriolar constriction. ACE inhibitors block this compensatory mechanism, causing a sharp drop in GFR and acute kidney injury.

Question 76: Which adjustment is appropriate for a patient on vancomycin with a trough of 25 mcg/mL and rising creatinine?

Add gentamicin
Increase the dose and frequency
Hold the dose and reassess renal function (Correct answer)
Continue unchanged

Correct answer: Hold the dose and reassess renal function

A supratherapeutic vancomycin trough with rising creatinine suggests accumulation and nephrotoxicity, warranting holding and reassessment.

Question 77: Which chemotherapy spill response item is essential and must be readily available in HD compounding areas?

Only a regular trash bag
A chemotherapy spill kit with appropriate PPE and absorbents (Correct answer)
A fire extinguisher only
A box of standard surgical masks alone

Correct answer: A chemotherapy spill kit with appropriate PPE and absorbents

A dedicated chemotherapy spill kit with PPE, absorbent materials, and disposal bags must be available wherever HDs are handled.

Question 78: Which agent is the preferred first-line pharmacotherapy for a pregnant patient with newly diagnosed chronic hypertension?

Losartan
Hydrochlorothiazide
Lisinopril
Labetalol (Correct answer)

Correct answer: Labetalol

Labetalol is a preferred antihypertensive in pregnancy, while ACE inhibitors and ARBs are contraindicated due to fetal toxicity.

Question 79: Geometric dilution is a technique used primarily to achieve what during non-sterile compounding?

Uniform mixing of a small amount of potent drug with a larger amount of diluent (Correct answer)
Reduction of particle size by trituration only
Increasing the beyond-use date
Sterilization of the final product

Correct answer: Uniform mixing of a small amount of potent drug with a larger amount of diluent

Geometric dilution ensures uniform distribution of a small quantity of potent drug throughout a larger diluent base.

Question 80: A patient with osteoporosis and a history of esophageal stricture needs treatment. Which option best fits the treatment plan?

Oral risedronate daily
IV zoledronic acid annually (Correct answer)
Oral alendronate weekly
Oral ibandronate monthly

Correct answer: IV zoledronic acid annually

Oral bisphosphonates are contraindicated with esophageal abnormalities, so IV zoledronic acid is preferred.

Question 81: A batch of parenteral nutrition (PN) solutions is prepared in an ISO 5 primary engineering control located within an ISO 7 buffer room. The compounding involves multiple additions and manipulations. According to the revised USP <797> guidelines, what is the maximum beyond-use date (BUD) for this Compounded Sterile Product (CSP) if it is stored in a refrigerator?

9 days (Correct answer)
30 hours
48 hours
14 days

Correct answer: 9 days

The revised USP <797> categorizes CSPs based on the environment in which they are compounded rather than by low, medium, or high risk. A CSP prepared in an ISO 5 PEC within an ISO 7 buffer room is considered a Category 2 CSP. For aseptically processed Category 2 CSPs without sterility testing, the maximum BUD when stored under refrigeration (2°C to 8°C) is 9 days, assuming stability data supports it.

Question 82: A patient with stage G3 CKD and persistent albuminuria despite a maximized ACE inhibitor would benefit from adding which agent for renal protection?

A potassium-sparing diuretic for the proteinuria
A SGLT2 inhibitor (Correct answer)
An NSAID
A second RAAS agent (ARB)

Correct answer: A SGLT2 inhibitor

SGLT2 inhibitors slow CKD progression and reduce albuminuria, and adding a second RAAS agent is discouraged.

Question 83: Which electrolyte abnormality predisposes to digoxin toxicity?

Hyperkalemia
Hypokalemia (Correct answer)
Hypernatremia
Hypochloremia

Correct answer: Hypokalemia

Hypokalemia increases digoxin binding to Na/K-ATPase, enhancing toxicity.

Question 84: A patient prescribed clopidogrel after a stent should be counseled to do what?

Not stop the medication without consulting the prescriber (Correct answer)
Stop it whenever bleeding gums occur
Take it only when chest pain occurs
Combine it freely with extra aspirin doses

Correct answer: Not stop the medication without consulting the prescriber

Premature discontinuation of antiplatelet therapy after stenting increases thrombosis risk.

Question 85: To create 1/3 NS 1 liter bag, you'll need 51.3 mEq of NaCl. How much 23.4 percent NaCl would you require? (Na has a molecular weight of 23 while Cl has a molecular weight of 35.5)

58.5ml
23.4ml
10ml
12.82ml (Correct answer)

Correct answer: 12.82ml

To determine the volume of 23.4% NaCl needed, first calculate the total grams of NaCl required: 51.3 mEq of NaCl is equivalent to 51.3 mmol, and with a molecular weight of 58.5 g/mol (23+35.5), this is 2.99955 grams. Since 23.4% NaCl means 23.4 grams of NaCl per 100 mL of solution, you would need (2.99955 g / 23.4 g) * 100 mL, which equals approximately 12.82 mL.

Question 86: Which mechanism explains why ACE inhibitors can cause a dry cough?

Accumulation of bradykinin and substance P (Correct answer)
Histamine release from mast cells
Increased angiotensin II levels
Direct beta-2 receptor blockade

Correct answer: Accumulation of bradykinin and substance P

ACE normally degrades bradykinin, so its inhibition raises bradykinin levels, triggering cough.

Question 87: You are asked to compound 240 mL of a 1:500 (w/v) solution. The drug is available as a pure powder. How many milligrams of the drug powder are needed?

480 mg (Correct answer)
500 mg
120 mg
240 mg

Correct answer: 480 mg

A 1:500 w/v solution means there is 1 gram of solute in every 500 mL of solution. To find out how much drug is needed for 240 mL, a proportion can be set up: (1 g / 500 mL) = (x g / 240 mL). Solving for x gives: x = (1 * 240) / 500 = 0.48 g. To convert grams to milligrams, multiply by 1000: 0.48 g * 1000 mg/g = 480 mg.

Question 88: Which agent reverses dabigatran anticoagulation?

Protamine sulfate
Andexanet alfa
Phytonadione
Idarucizumab (Correct answer)

Correct answer: Idarucizumab

Idarucizumab is a monoclonal antibody fragment specific for dabigatran reversal.

Question 89: A 68-year-old with heart failure (EF 30%) and a serum potassium of 5.6 mEq/L is on lisinopril and spironolactone. Which intervention is most appropriate?

Add amlodipine for additional benefit
Hold the spironolactone and recheck potassium (Correct answer)
Start a potassium supplement
Increase the lisinopril dose

Correct answer: Hold the spironolactone and recheck potassium

Hyperkalemia (>5.5 mEq/L) from combined ACE inhibitor and aldosterone antagonist therapy warrants holding the spironolactone and rechecking potassium.

Question 90: A patient with seizure disorder and hepatic impairment needs an antiepileptic with minimal hepatic metabolism. Which is most appropriate?

Phenytoin
Valproic acid
Levetiracetam (Correct answer)
Carbamazepine

Correct answer: Levetiracetam

Levetiracetam is primarily renally eliminated and is preferred when hepatic metabolism must be minimized.

Question 91: A patient with stable angina remains symptomatic on maximally tolerated metoprolol. Which addition is most appropriate?

A dihydropyridine calcium channel blocker (Correct answer)
Digoxin
Flecainide
An oral nitrate as needed only

Correct answer: A dihydropyridine calcium channel blocker

Adding a dihydropyridine calcium channel blocker to a beta-blocker provides additional antianginal control in stable angina.

Question 92: The mechanism of action of bisphosphonates (e.g., alendronate) is:

RANKL receptor blockade
Stimulation of osteoblast proliferation
Inhibition of osteoclast-mediated bone resorption (Correct answer)
Increased intestinal calcium absorption

Correct answer: Inhibition of osteoclast-mediated bone resorption

Bisphosphonates inhibit osteoclast activity and induce their apoptosis, reducing bone resorption.

Question 93: A child experiencing an acute asthma exacerbation is administered albuterol via a nebulizer. The therapeutic effect of this medication is achieved through which mechanism?

Stabilization of mast cell membranes
Inhibition of leukotriene synthesis
Stimulation of beta-2 adrenergic receptors causing smooth muscle relaxation (Correct answer)
Antagonism of muscarinic receptors leading to bronchodilation

Correct answer: Stimulation of beta-2 adrenergic receptors causing smooth muscle relaxation

Albuterol is a selective beta-2 adrenergic receptor agonist. Stimulation of these receptors in the lungs leads to the relaxation of bronchial smooth muscle, resulting in bronchodilation and relief of bronchospasm.

Question 94: Which vaccine can be co-administered at the same visit with another inactivated vaccine without interval restrictions?

Two different live attenuated vaccines on different days
None can be co-administered
Only one vaccine per visit allowed
Inactivated influenza vaccine (Correct answer)

Correct answer: Inactivated influenza vaccine

Inactivated vaccines can generally be administered simultaneously with other inactivated or live vaccines without spacing concerns.

Question 95: A patient on a transdermal fentanyl patch should be told to do what when applying a new patch?

Apply heat over the patch to speed absorption
Cut the patch to adjust the dose
Rotate application sites and avoid external heat (Correct answer)
Apply to broken or irritated skin

Correct answer: Rotate application sites and avoid external heat

Heat increases fentanyl release and risk of overdose, and sites should be rotated to prevent irritation.

Question 96: Which laboratory value should be monitored when initiating vancomycin therapy?

TSH
Serum trough and renal function (Correct answer)
Lipase
INR

Correct answer: Serum trough and renal function

Vancomycin requires trough or AUC monitoring and renal function assessment due to nephrotoxicity.

Question 97: Beta-blockers reduce heart rate and contractility by:

Blocking L-type calcium channels
Antagonizing beta-1 adrenergic receptors (Correct answer)
Agonizing muscarinic receptors
Inhibiting Na+/K+ ATPase

Correct answer: Antagonizing beta-1 adrenergic receptors

Beta-1 blockade decreases cAMP in cardiac tissue, lowering heart rate and contractility.

Question 98: Jen is an 75-year-old woman who is undergoing back surgery. Her height is 5 feet 4 inches, her weight is 85 kg, and NKDA. Hypertension, diabetes, serious depression, hypothyroidism, and persistent back pain are among her former medical conditions. Jen's post-op medications include Dexamethasone 8mg iv q6h with taper dose, Ondansetron 4mg iv q6h prn for N/V, and Ondansetron 4mg iv q6h prn for N/V. Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20m, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dosage 0.1mg, metoclopramide 10mg iv q6h, metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg Lockout every 6 minutes, with a one-hour limit of 2.2 mg/hr. Morning labs include serum creatinine 1.4 mg/dl, magnesium 1.5 mg/dl, potassium 5.0 mmol/L, and sodium 135 mmol/L. Why is it suggested that people using chronic metformin have their total blood count monitored?

Metformin may cause leukocytosis
Metformin may decrease iron absorption
Metformin may decreases erythropoietin level
Metformin may decreases vitamin B12 levels (Correct answer)

Correct answer: Metformin may decreases vitamin B12 levels

Long-term use of metformin, a medication for type 2 diabetes, can interfere with the absorption of vitamin B12 in the gastrointestinal tract. This can lead to vitamin B12 deficiency, which is crucial for red blood cell formation. Consequently, monitoring a patient's total blood count (CBC) is recommended to detect potential megaloblastic anemia, a hematological manifestation of B12 deficiency, allowing for timely supplementation if needed.

Question 99: A patient with gout on chronic urate-lowering therapy has frequent flares during initiation. What preventive plan is appropriate?

Add anti-inflammatory flare prophylaxis such as colchicine (Correct answer)
Begin high-dose vitamin C
Double the allopurinol immediately
Stop urate-lowering therapy

Correct answer: Add anti-inflammatory flare prophylaxis such as colchicine

Flare prophylaxis with colchicine or NSAIDs is recommended when starting urate-lowering therapy.

Question 100: Metformin's primary glucose-lowering mechanism is best described as:

Inhibiting SGLT2 in the kidney
Blocking intestinal alpha-glucosidase
Decreasing hepatic gluconeogenesis (Correct answer)
Stimulating pancreatic insulin secretion

Correct answer: Decreasing hepatic gluconeogenesis

Metformin chiefly reduces hepatic glucose production via AMPK activation.

Question 101: A patient newly started on a statin reports muscle aches. What is the appropriate counseling response?

Ignore it as statins never cause muscle problems
Double the statin dose immediately
Report muscle pain, tenderness, or dark urine to the provider (Correct answer)
Stop drinking all fluids

Correct answer: Report muscle pain, tenderness, or dark urine to the provider

Muscle pain with dark urine may signal myopathy or rhabdomyolysis and should be reported.

Question 102: Which lab parameter is most important to monitor when initiating allopurinol in a patient with gout and CKD?

Thyroid function
Prolactin
Serum calcium
Serum creatinine and CBC (Correct answer)

Correct answer: Serum creatinine and CBC

Allopurinol requires renal dose adjustment and can cause hypersensitivity/marrow effects, so renal function and CBC are monitored.

Question 103: A pharmacist needs to incorporate a very small amount of a potent powdered drug into a large amount of diluent to prepare a capsule formulation. Which of the following compounding techniques is most appropriate to ensure a homogenous mixture?

Pulverization by intervention
Geometric dilution (Correct answer)
Spatulation
Levigation

Correct answer: Geometric dilution

Geometric dilution is the standard method for blending two or more powder ingredients of unequal quantities to ensure the final mixture is uniform. It involves starting with the smallest quantity ingredient and mixing it with an approximately equal amount of the larger quantity ingredient, then continuing to add the diluent in amounts equal to the mixture's volume until all the diluent is incorporated.

Question 104: Which mechanism explains aspirin's antiplatelet action?

ADP receptor blockade
Vitamin K epoxide reductase inhibition
Reversible COX-2 inhibition
Irreversible acetylation of COX-1 blocking thromboxane A2 (Correct answer)

Correct answer: Irreversible acetylation of COX-1 blocking thromboxane A2

Aspirin irreversibly acetylates platelet COX-1, reducing thromboxane A2.

Question 105: Per USP <800>, where should hazardous drugs be unpacked?

In the pharmacy waiting room
Only inside the laminar airflow hood
In any convenient positive-pressure office
In a neutral or negative-pressure area, never in a positive-pressure space (Correct answer)

Correct answer: In a neutral or negative-pressure area, never in a positive-pressure space

HDs must be unpacked in a neutral/negative-pressure area to prevent contamination spread, not in positive-pressure rooms.

Question 106: Which mechanism explains the antiemetic action of ondansetron?

Dopamine D2 receptor agonism
Histamine H1 receptor agonism
5-HT3 serotonin receptor antagonism (Correct answer)
Muscarinic M1 receptor agonism

Correct answer: 5-HT3 serotonin receptor antagonism

Ondansetron blocks 5-HT3 receptors in the gut and CTZ to prevent nausea.

Question 107: A patient taking lithium 300 mg three times daily reports new-onset coarse tremor, confusion, and vomiting. His lithium serum level is 2.1 mEq/L. What is the most appropriate immediate intervention?

Hold lithium, provide IV hydration, and arrange emergent evaluation (Correct answer)
Administer sodium polystyrene sulfonate to enhance lithium excretion
Reduce the lithium dose by 50% and recheck level in 48 hours
Add propranolol to manage the tremor and continue lithium

Correct answer: Hold lithium, provide IV hydration, and arrange emergent evaluation

A lithium level of 2.1 mEq/L with neurological and GI symptoms indicates moderate-to-severe toxicity (therapeutic range: 0.6–1.2 mEq/L for maintenance). Lithium must be held immediately, and IV normal saline is given to enhance renal clearance. Emergent evaluation for possible hemodialysis is indicated.

Question 108: What is the minimum percentage of active ingredient recovery typically required for an acceptable compounded preparation?

50–150% of labeled potency
80–125% of labeled potency
70–130% of labeled potency
90–110% of labeled potency (Correct answer)

Correct answer: 90–110% of labeled potency

Compounded preparations generally must contain 90–110% of the labeled amount of active ingredient.

Question 109: A prescription is written for aminophylline 300 mg tablets, with a direction of 'Take 1 tablet TID for 10 days'. The bioavailability of aminophylline is 80% of theophylline. How many milligrams of theophylline will the patient receive from a single dose?

60 mg
300 mg
375 mg
240 mg (Correct answer)

Correct answer: 240 mg

Each tablet contains 300 mg of aminophylline. To find the equivalent amount of theophylline, you must account for the salt factor. Aminophylline is approximately 80% theophylline by weight. Therefore, the amount of theophylline in one 300 mg aminophylline tablet is: 300 mg aminophylline * 0.80 = 240 mg of theophylline. The frequency and duration are not needed to answer the specific question about a single dose.

Question 110: Which agent is first-line for acute anaphylaxis?

IV diphenhydramine
Nebulized albuterol
IM epinephrine (Correct answer)
Oral prednisone

Correct answer: IM epinephrine

Intramuscular epinephrine into the anterolateral thigh is the immediate first-line treatment for anaphylaxis.

Question 111: What is the primary medication safety goal for using 'tall man lettering' (e.g., glipiZIDE vs. glyBURIDE) on pharmacy labels and in computer systems?

To fulfill a legal requirement for the labeling of all generic medications.
To help visually differentiate the names of look-alike drug products to prevent selection errors. (Correct answer)
To identify medications that are classified as controlled substances.
To indicate which medications require special storage conditions like refrigeration.

Correct answer: To help visually differentiate the names of look-alike drug products to prevent selection errors.

Tall man lettering is an error-prevention strategy that uses a mix of uppercase and lowercase letters to highlight the differences between look-alike, sound-alike (LASA) drug names. This practice, promoted by the ISMP and FDA, helps pharmacists and technicians more easily distinguish between similar names, reducing the risk of selecting the wrong product.

Question 112: Statins lower LDL primarily by:

Binding bile acids in the intestine
Inhibiting HMG-CoA reductase and upregulating LDL receptors (Correct answer)
Inhibiting PCSK9
Blocking intestinal cholesterol absorption

Correct answer: Inhibiting HMG-CoA reductase and upregulating LDL receptors

Statins inhibit HMG-CoA reductase, lowering intracellular cholesterol and upregulating hepatic LDL receptors.

Question 113: Co-administration of valproic acid with lamotrigine results in which clinically important pharmacokinetic interaction?

Lamotrigine induces valproic acid metabolism, reducing its efficacy
Both drugs mutually induce each other's elimination
Valproic acid induces lamotrigine glucuronidation, halving its levels
Valproic acid inhibits UGT-mediated lamotrigine glucuronidation, approximately doubling its half-life (Correct answer)

Correct answer: Valproic acid inhibits UGT-mediated lamotrigine glucuronidation, approximately doubling its half-life

Valproic acid inhibits UDP-glucuronosyltransferase (UGT1A4/2B7), the enzymes responsible for lamotrigine conjugation; this doubles lamotrigine's half-life and plasma levels, necessitating a 50% lamotrigine dose reduction to avoid toxicity.

Question 114: Which statement about metformin counseling is most accurate?

It must be taken on an empty stomach
GI upset is common and improves by taking it with meals (Correct answer)
It causes significant weight gain
It commonly causes hypoglycemia as monotherapy

Correct answer: GI upset is common and improves by taking it with meals

Metformin frequently causes GI side effects that are minimized by taking it with food.

Question 115: A patient prescribed oral contraceptives should be told that which medication may reduce their effectiveness?

Loratadine
Vitamin C
Rifampin (Correct answer)
Acetaminophen

Correct answer: Rifampin

Rifampin induces hepatic enzymes and can lower contraceptive hormone levels.

Question 116: Which electrolyte abnormality is most commonly associated with thiazide diuretic therapy?

Hypokalemia (Correct answer)
Hyperkalemia
Hypernatremia
Hyperphosphatemia

Correct answer: Hypokalemia

Thiazides increase sodium and water delivery to the distal collecting duct, stimulating aldosterone-mediated potassium secretion and resulting in clinically significant hypokalemia, particularly dangerous in patients also taking digoxin.

Question 117: What is the primary purpose of a low-lint, sterile wipe when cleaning the PEC?

Add fragrance to the hood
Minimize particle and fiber shedding that could contaminate the sterile field (Correct answer)
Sterilize the HEPA filter
Increase humidity in the buffer room

Correct answer: Minimize particle and fiber shedding that could contaminate the sterile field

Low-lint wipes prevent fibers and particles from shedding into the ISO Class 5 environment.

Question 118: A patient starting warfarin asks about diet. What is the most appropriate counseling point?

Double the dose on days you eat leafy greens
Keep vitamin K intake consistent rather than eliminating it (Correct answer)
Avoid all foods containing vitamin K entirely
Take warfarin with grapefruit juice to boost effect

Correct answer: Keep vitamin K intake consistent rather than eliminating it

Consistency of vitamin K intake matters more than avoidance, since sudden changes alter INR.

Question 119: Which counseling point is correct for a patient using a topical nitroglycerin or other transdermal patch with a nitrate-free interval?

Apply two patches at once
Wear the patch continuously 24 hours a day
Cut the patch in half for a lower dose
Remove the patch for a daily nitrate-free period to prevent tolerance (Correct answer)

Correct answer: Remove the patch for a daily nitrate-free period to prevent tolerance

A daily nitrate-free interval helps prevent the development of nitrate tolerance.

Question 120: Which of the following medications can reduce the severity of seizures?

All of the above (Correct answer)
Tramadol
Bupropion
Thiothixene

Correct answer: All of the above

All the listed medications have the potential to lower the seizure threshold, thereby increasing the risk or severity of seizures. Tramadol is an opioid that can induce seizures, especially at higher doses. Bupropion is an antidepressant well-known for its dose-dependent seizure risk. Thiothixene, an antipsychotic, can also lower the seizure threshold. Therefore, caution is warranted when these drugs are used in patients prone to seizures.

Question 121: You are asked to compound 240 mL of a 250 mg/5 mL amoxicillin suspension. The pharmacy only has amoxicillin 400 mg/5 mL suspension and a suitable cherry-flavored syrup for dilution. How much of the 400 mg/5 mL suspension is required?

120 mL
150 mL (Correct answer)
200 mL
180 mL

Correct answer: 150 mL

Use the dilution formula C1V1 = C2V2. C1 = 400 mg/5 mL, V1 = ?, C2 = 250 mg/5 mL, V2 = 240 mL. To simplify, you can use the concentrations directly: (400 mg/5 mL) * V1 = (250 mg/5 mL) * 240 mL. The ' /5 mL' term cancels out. So, 400 * V1 = 250 * 240. V1 = (250 * 240) / 400. V1 = 60000 / 400. V1 = 150 mL.

Question 122: A patient started on a statin develops unexplained muscle pain with a markedly elevated creatine kinase. What is the appropriate action?

Add a fibrate to the statin
Discontinue the statin immediately (Correct answer)
Increase the statin dose
Continue the statin and recheck in 6 months

Correct answer: Discontinue the statin immediately

Marked CK elevation with myalgia suggests statin-induced myopathy, requiring prompt discontinuation of the statin.

Question 123: A patient on chronic NSAIDs for arthritis with a history of peptic ulcer should receive which protective therapy?

An additional NSAID
An anticoagulant
A high-dose corticosteroid
A proton pump inhibitor (Correct answer)

Correct answer: A proton pump inhibitor

PPIs reduce NSAID-related GI ulcer risk in high-risk patients.

Question 124: Which antibiotic class inhibits bacterial DNA gyrase and topoisomerase IV?

Fluoroquinolones (Correct answer)
Macrolides
Aminoglycosides
Tetracyclines

Correct answer: Fluoroquinolones

Fluoroquinolones target DNA gyrase and topoisomerase IV, blocking DNA replication.

Question 125: A patient with a sulfa allergy should avoid which diuretic class without caution?

Mannitol
Ethacrynic acid
Loop diuretics generally (Correct answer)
Spironolactone

Correct answer: Loop diuretics generally

Most thiazide and loop diuretics contain a sulfonamide moiety; ethacrynic acid is the loop option lacking it.

Question 126: A patient starting allopurinol for gout should be counseled that it does what?

Lowers uric acid over time and may initially trigger flares (Correct answer)
Requires no fluid intake
Relieves acute gout pain within minutes
Should be stopped at the first sign of any flare

Correct answer: Lowers uric acid over time and may initially trigger flares

Allopurinol is a urate-lowering maintenance therapy that can precipitate flares early on.

Question 127: A pharmacist needs to prepare 120 g of a 1.5% hydrocortisone cream. The pharmacy has 2.5% and 0.5% hydrocortisone creams in stock. How many grams of the 2.5% cream are needed?

45 g
90 g
30 g
60 g (Correct answer)

Correct answer: 60 g

This is an alligation problem. Set up the alligation grid. The desired percentage (1.5%) is in the center. The higher concentration (2.5%) is in the top left, and the lower concentration (0.5%) is in the bottom left. Subtract diagonally: 2.5 - 1.5 = 1 (part of 0.5% cream) and 1.5 - 0.5 = 1 (part of 2.5% cream). The ratio of 2.5% cream to 0.5% cream is 1:1. The total number of parts is 1 + 1 = 2. To find the amount of 2.5% cream needed: (1 part / 2 total parts) * 120 g = 60 g.

Question 128: A patient with newly diagnosed atrial fibrillation has a CHA2DS2-VASc score of 4. What is the appropriate anticoagulation plan if there are no contraindications?

No anticoagulation
Dual antiplatelet therapy
A direct oral anticoagulant (Correct answer)
Aspirin alone

Correct answer: A direct oral anticoagulant

A CHA2DS2-VASc score of 4 indicates high stroke risk warranting oral anticoagulation, with DOACs preferred over warfarin in nonvalvular AF.

Question 129: A pharmacist is conducting a medication therapy review (MTR) for a 75-year-old female patient with osteoporosis, GERD, and insomnia. Her profile includes alendronate 70 mg weekly, calcium/vitamin D supplement daily, omeprazole 20 mg daily, and zolpidem 5 mg at bedtime as needed. The patient reports experiencing increased mid-back pain over the last month. When assessing the therapeutic plan, which is the most critical parameter for the pharmacist to evaluate further?

The timing of the calcium supplement administration.
Long-term use of a proton pump inhibitor.
The risk of falls associated with zolpidem use. (Correct answer)
The potential for esophagitis with alendronate.

Correct answer: The risk of falls associated with zolpidem use.

While all options are valid considerations in a comprehensive review, the combination of advanced age, a medication known to cause CNS depression and ataxia (zolpidem), and a diagnosis of osteoporosis makes the risk of falls and subsequent fractures the most critical safety concern. A fall in this patient could have devastating consequences. The pharmacist must assess the frequency of zolpidem use, inquire about dizziness or drowsiness, and discuss fall prevention strategies, potentially recommending a safer alternative for insomnia.

Question 130: A patient using a new insulin pen should be counseled to do what before injecting a dose?

Inject into a muscle for faster action
Prime the pen to remove air and confirm flow (Correct answer)
Reuse the same needle for a week
Inject into the same exact spot daily

Correct answer: Prime the pen to remove air and confirm flow

Priming clears air and ensures accurate dose delivery from the pen.

Question 131: Which monitoring is essential when a patient begins long-term oral corticosteroid therapy?

Visual acuity weekly
Serum amylase only
Coagulation panel daily
Blood glucose and bone density (Correct answer)

Correct answer: Blood glucose and bone density

Chronic corticosteroids cause hyperglycemia and osteoporosis, so glucose and bone health are monitored.

Question 132: Jen is an 75-year-old woman who is undergoing back surgery. Her height is 5 feet 4 inches, her weight is 85 kg, and NKDA. Hypertension, diabetes, serious depression, hypothyroidism, and persistent back pain are among her former medical conditions. Jen's post-op medications include Dexamethasone 8mg iv q6h with taper dose, Ondansetron 4mg iv q6h prn for N/V, and Ondansetron 4mg iv q6h prn for N/V. Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20m, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dosage 0.1mg, metoclopramide 10mg iv q6h, metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg Lockout every 6 minutes, with a one-hour limit of 2.2 mg/hr. Morning labs include serum creatinine 1.4 mg/dl, magnesium 1.5 mg/dl, potassium 5.0 mmol/L, and sodium 135 mmol/L. When given at a larger dose and over a longer period of time, which of the following medications may cause tardive dyskinesia?

Metoclopramide (Correct answer)
Lisinopril
Dexamethasone
Famotidine

Correct answer: Metoclopramide

Metoclopramide is a dopamine D2 receptor antagonist used as an antiemetic and prokinetic agent. A significant and serious adverse effect associated with its long-term or high-dose use is tardive dyskinesia, a movement disorder characterized by involuntary, repetitive body movements. Due to this risk, metoclopramide carries a black box warning, and its use is generally limited to short durations.

Question 133: Which statin requires the most caution when combined with gemfibrozil due to rhabdomyolysis risk?

Pravastatin
Atorvastatin
Rosuvastatin
Simvastatin (Correct answer)

Correct answer: Simvastatin

Gemfibrozil is contraindicated with simvastatin because it greatly increases statin exposure and myopathy risk.

Question 134: Which counseling point is essential for a patient starting alendronate?

Take at bedtime with food
Take with calcium for better absorption
Take with at least 6 oz water and remain upright 30 minutes (Correct answer)
Crush and mix in juice

Correct answer: Take with at least 6 oz water and remain upright 30 minutes

Bisphosphonates must be taken with plain water on an empty stomach, staying upright to prevent esophageal irritation.

Question 135: A patient starting montelukast should be counseled about which potential adverse effect?

Neuropsychiatric effects such as mood changes (Correct answer)
Bright orange urine
Permanent hair loss
Severe hyperglycemia

Correct answer: Neuropsychiatric effects such as mood changes

Montelukast carries a warning for neuropsychiatric events including mood and behavior changes.

Question 136: A patient taking an SSRI is started on tramadol. What is the primary concern?

QT shortening
Serotonin syndrome (Correct answer)
Hypoglycemia
Hyperkalemia

Correct answer: Serotonin syndrome

Tramadol has serotonergic activity, and combining it with an SSRI raises serotonin syndrome risk.

Question 137: A patient with chronic stable HFrEF on optimized therapy still has a heart rate of 80 bpm in sinus rhythm and remains symptomatic. Which agent may be added?

Disopyramide
Verapamil
Ivabradine (Correct answer)
Sotalol

Correct answer: Ivabradine

Ivabradine reduces heart rate in symptomatic HFrEF patients in sinus rhythm with a rate of 70 bpm or higher on a maximally tolerated beta-blocker.

Question 138: What should a pharmacist do if a refrigerated vaccine is inadvertently exposed to freezing temperatures?

Quarantine the vaccine and contact the manufacturer or state program before use (Correct answer)
Re-refrigerate and ignore
Discard all freezer contents only
Use it immediately

Correct answer: Quarantine the vaccine and contact the manufacturer or state program before use

Vaccines exposed to out-of-range temperatures should be quarantined and not used until viability is confirmed.

Question 139: What is the appropriate hand antiseptic step immediately before donning sterile gloves in the anteroom?

Apply a waterless alcohol-based surgical hand scrub and let dry (Correct answer)
Wipe hands with a dry paper towel
Rinse with tap water only
Apply petroleum-based lotion

Correct answer: Apply a waterless alcohol-based surgical hand scrub and let dry

After gowning, a persistent alcohol-based surgical hand antiseptic is applied and allowed to dry before donning sterile gloves.

Question 140: A patient taking levothyroxine also begins calcium carbonate supplements. What counseling is needed?

Stop the levothyroxine
Separate administration by at least 4 hours (Correct answer)
Double the levothyroxine dose
Take them together for convenience

Correct answer: Separate administration by at least 4 hours

Calcium binds levothyroxine and reduces absorption, so dosing should be separated by several hours.

Question 141: A patient with chronic kidney disease stage 4 and anemia has iron-replete stores. What is the most appropriate therapy?

Folic acid alone
An erythropoiesis-stimulating agent (Correct answer)
Oral iron supplementation alone
Vitamin B12 injection

Correct answer: An erythropoiesis-stimulating agent

Anemia of CKD with adequate iron stores is treated with an erythropoiesis-stimulating agent to correct erythropoietin deficiency.

Question 142: Which of the following correctly describes the air pressure relationship required by USP <797> for a non-hazardous sterile compounding cleanroom suite?

The buffer area and anteroom must be at a negative pressure relative to the general pharmacy area.
The buffer area must be at a positive pressure to the anteroom, and the anteroom must be at a positive pressure to the general pharmacy area. (Correct answer)
All compounding areas, including the buffer and anteroom, should have equal air pressure to the surrounding pharmacy.
The anteroom must be at a higher positive pressure than the buffer area to create an air lock.

Correct answer: The buffer area must be at a positive pressure to the anteroom, and the anteroom must be at a positive pressure to the general pharmacy area.

To prevent the influx of lower-quality air, USP <797> requires a positive pressure cascade for non-hazardous compounding. The buffer area (the cleanest room, typically ISO 7) must maintain a positive pressure relative to the adjacent anteroom (typically ISO 8). The anteroom, in turn, must maintain a positive pressure relative to the unclassified general pharmacy area. This ensures that air flows from cleaner spaces to less clean spaces, reducing the risk of contamination.

Question 143: A patient's creatinine clearance is calculated to be 45 mL/min. The standard dose of Drug X is 500 mg every 12 hours for patients with a CrCl > 60 mL/min. The dosing guidelines recommend a 50% dose reduction for patients with a CrCl between 30-60 mL/min. What is the appropriate adjusted daily dose for this patient?

250 mg
750 mg
1000 mg
500 mg (Correct answer)

Correct answer: 500 mg

The standard total daily dose is 500 mg/dose * 2 doses/day = 1000 mg/day. The patient's CrCl of 45 mL/min falls into the 30-60 mL/min range, which requires a 50% dose reduction. The adjusted daily dose is 1000 mg * 0.50 = 500 mg/day.

Question 144: When using a horizontal laminar airflow hood, why should objects never be placed between the HEPA filter and a sterile item?

It reduces the humidity needed for sterility
It increases the temperature of the hood
It causes the HEPA filter to expire faster
It blocks airflow and creates downstream contamination zones (Correct answer)

Correct answer: It blocks airflow and creates downstream contamination zones

Objects upstream disrupt first air, creating zones of turbulence and contamination shadows downstream.

Question 145: Which antihypertensive is preferred in a pregnant patient with chronic hypertension?

Labetalol (Correct answer)
Spironolactone
Losartan
Lisinopril

Correct answer: Labetalol

Labetalol is considered safe in pregnancy, whereas ACE inhibitors and ARBs are contraindicated.

Question 146: Under USP <800>, what type of facility ventilation is required for compounding hazardous drugs?

Open laboratory with general HVAC only
Positive-pressure room with no external venting
Externally vented, negative-pressure room with at least 12 air changes per hour (Correct answer)
Recirculating HEPA with no pressure differential

Correct answer: Externally vented, negative-pressure room with at least 12 air changes per hour

USP <800> requires HD compounding rooms to be externally vented, negative pressure, with a minimum of 12 ACPH.

Question 147: Why must aminoglycosides be dosed carefully with monitoring?

Narrow therapeutic index with nephro- and ototoxicity (Correct answer)
They are CYP3A4 inducers
They are highly protein bound
They cause QT prolongation primarily

Correct answer: Narrow therapeutic index with nephro- and ototoxicity

Aminoglycosides have a narrow therapeutic index, risking nephrotoxicity and ototoxicity.

Question 148: A patient with Helicobacter pylori-associated peptic ulcer disease and no penicillin allergy should receive which regimen?

A single antibiotic with a PPI
A PPI alone for 8 weeks
An H2 blocker plus sucralfate
Clarithromycin triple therapy or bismuth quadruple therapy (Correct answer)

Correct answer: Clarithromycin triple therapy or bismuth quadruple therapy

Eradication of H. pylori requires combination therapy such as clarithromycin triple or bismuth quadruple therapy.

Question 149: What proportion of the sample is found within two standard deviations of the mean in a normal distribution?

78%
95% (Correct answer)
95%
100%

Correct answer: 95%

In a normal distribution, also known as a Gaussian distribution, a specific proportion of data falls within certain standard deviations from the mean. According to the empirical rule (or 68-95-99.7 rule), approximately 68% of data falls within one standard deviation, and approximately 95% of the data falls within two standard deviations of the mean. This is a fundamental concept in statistics.

Question 150: Which is the best counseling for a patient starting oral prednisone for a tapering course?

Stop abruptly once you feel better
Take all doses at bedtime to aid sleep
Do not stop suddenly; follow the taper as directed (Correct answer)
Skip doses on weekends

Correct answer: Do not stop suddenly; follow the taper as directed

Abrupt discontinuation of corticosteroids can cause adrenal insufficiency, so tapering is required.

Question 151: Which antihypertensive class is preferred first-line in a diabetic patient with albuminuria?

ACE inhibitors (Correct answer)
Alpha blockers
Beta-blockers
Loop diuretics

Correct answer: ACE inhibitors

ACE inhibitors provide renoprotection and reduce albuminuria in diabetic nephropathy.

Question 152: Per USP <797>, what is a beyond-use date (BUD) primarily based on?

The pharmacist's preference
The patient's insurance coverage period
The expiration date printed on the source vial only
Sterility and stability risk of the preparation (Correct answer)

Correct answer: Sterility and stability risk of the preparation

BUDs are assigned based on the risk of microbial contamination and chemical/physical stability of the compounded preparation.

Question 153: When assessing a patient's therapeutic plan, which of the following is the primary goal of evaluating the 'effectiveness' of a medication?

To ensure the medication has an appropriate indication for the patient's condition.
To determine if the medication is achieving its desired therapeutic goals. (Correct answer)
To verify that the patient is taking the medication as prescribed.
To determine if the medication is causing any adverse effects.

Correct answer: To determine if the medication is achieving its desired therapeutic goals.

The assessment of a therapeutic plan involves evaluating four key areas: indication, effectiveness, safety, and adherence. The 'effectiveness' component specifically focuses on whether the drug therapy is producing the desired positive outcomes and meeting the established therapeutic goals for the patient's condition. Safety relates to adverse effects, adherence is about compliance, and indication is about the reason for the therapy.

Question 154: A patient stabilized on warfarin begins amiodarone therapy for atrial fibrillation. What dose adjustment to warfarin is typically required?

Decrease warfarin dose by 30–50% (Correct answer)
Increase warfarin dose by 50%
No dose adjustment is needed
Discontinue warfarin immediately

Correct answer: Decrease warfarin dose by 30–50%

Amiodarone inhibits CYP2C9, the primary enzyme responsible for metabolizing warfarin's active S-enantiomer, resulting in elevated INR and requiring a 30–50% reduction in warfarin dose.

Question 155: A patient maintained on lithium for bipolar disorder begins taking ibuprofen regularly for arthritis pain. What effect on lithium levels is expected?

Lithium levels will remain unchanged
Lithium levels will decrease
Lithium half-life will shorten significantly
Lithium levels will increase (Correct answer)

Correct answer: Lithium levels will increase

NSAIDs inhibit prostaglandin-mediated renal vasodilation, reducing renal blood flow and lithium clearance, which raises serum lithium levels and increases the risk of toxicity.

Question 156: Which therapeutic change is appropriate for a patient on amiodarone who develops elevated TSH and low free T4?

Double the amiodarone dose
Stop monitoring thyroid function
Add levothyroxine and continue monitoring (Correct answer)
Start methimazole

Correct answer: Add levothyroxine and continue monitoring

Amiodarone-induced hypothyroidism is treated with levothyroxine while continuing thyroid monitoring.

Question 157: A patient is brought to the emergency department with respiratory depression and miosis. An opioid overdose is suspected. Administration of naloxone rapidly reverses these symptoms. By what mechanism does naloxone work?

It acts as a partial agonist at the mu-opioid receptor, displacing the full agonist.
It increases the metabolic clearance of opioids by inducing hepatic enzymes.
It stimulates the release of endogenous endorphins to counteract the opioid effect.
It acts as a competitive antagonist at mu, kappa, and delta opioid receptors. (Correct answer)

Correct answer: It acts as a competitive antagonist at mu, kappa, and delta opioid receptors.

Naloxone is a pure opioid antagonist that has a high affinity for opioid receptors, particularly the mu-receptor. It works by competitively binding to these receptors, thereby displacing the opioid agonist (like heroin or oxycodone) and rapidly reversing its effects, most critically respiratory depression.

Question 158: Beta-blockers reduce heart rate primarily by antagonizing which receptor?

Beta-2 adrenergic receptors
Beta-1 adrenergic receptors (Correct answer)
Muscarinic M2 receptors
Alpha-1 adrenergic receptors

Correct answer: Beta-1 adrenergic receptors

Blocking cardiac beta-1 receptors decreases heart rate and contractility.

Question 159: A patient on metformin is scheduled for a CT scan requiring iodinated contrast. What is the primary pharmacokinetic concern?

Allergic cross-reaction between metformin and iodine
Contrast media reduces CT image quality in patients on metformin
Contrast-induced nephropathy impairs metformin excretion, raising lactic acidosis risk (Correct answer)
Iodinated contrast increases hypoglycemia risk

Correct answer: Contrast-induced nephropathy impairs metformin excretion, raising lactic acidosis risk

Iodinated contrast can precipitate acute kidney injury, which impairs metformin's renal elimination; the resulting metformin accumulation shifts glucose metabolism toward anaerobic pathways and risks potentially fatal lactic acidosis.

Question 160: A healthy 30-year-old patient with no contraindications requests influenza vaccination in October. Which formulation is preferred?

Inactivated influenza vaccine (IIV) (Correct answer)
Pneumococcal polysaccharide vaccine
Live attenuated influenza vaccine only for those over 65
Tetanus-diphtheria vaccine

Correct answer: Inactivated influenza vaccine (IIV)

Inactivated influenza vaccine is appropriate for most adults and is the standard recommended formulation.

Question 161: A hospital pharmacy is implementing new safety protocols for U-500 regular insulin, a high-alert medication. Which of the following strategies is the MOST critical to prevent a catastrophic dosing error?

Applying an auxiliary label that states 'High-Alert Medication' to the vial before dispensing.
Dispensing U-500 insulin only with U-500 specific syringes or dedicated pens. (Correct answer)
Requiring a mandatory pharmacist-led education session for all new nursing staff.
Storing U-500 insulin vials in a separate, clearly labeled bin in the main pharmacy refrigerator.

Correct answer: Dispensing U-500 insulin only with U-500 specific syringes or dedicated pens.

U-500 insulin is five times more concentrated than standard U-100 insulin. The greatest risk of error comes from accidentally measuring a U-500 dose using a standard U-100 syringe, which can lead to a 5-fold overdose. Therefore, the most critical safety measure is to eliminate this possibility by dispensing U-500 insulin ONLY with syringes calibrated specifically for it or in its own dedicated pen device. While storage, education, and labels are important, they are less effective at preventing this specific, high-risk error than using the correct administration device.

Question 162: What is the best counseling for a patient prescribed oral tetracycline?

Avoid dairy, antacids, and iron near dosing time (Correct answer)
Take immediately after a calcium supplement
Take with milk for better tolerability
Always take with an antacid

Correct answer: Avoid dairy, antacids, and iron near dosing time

Divalent and trivalent cations chelate tetracyclines and reduce absorption.

Question 163: Jen is an 75-year-old woman who is undergoing back surgery. Her height is 5 feet 4 inches, her weight is 85 kg, and NKDA. Hypertension, diabetes, serious depression, hypothyroidism, and persistent back pain are among her former medical conditions. Jen's post-op medications include Dexamethasone 8mg iv q6h with taper dose, Ondansetron 4mg iv q6h prn for N/V, and Ondansetron 4mg iv q6h prn for N/V. Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20m, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dosage 0.1mg, metoclopramide 10mg iv q6h, metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg Lockout every 6 minutes, with a one-hour limit of 2.2 mg/hr. Morning labs include serum creatinine 1.4 mg/dl, magnesium 1.5 mg/dl, potassium 5.0 mmol/L, and sodium 135 mmol/L. Which of the following medications has the potential to raise Jen's blood glucose levels?

Metoclopramide
Lisinopril
Hydromorphone
Dexamethasone (Correct answer)

Correct answer: Dexamethasone

Dexamethasone is a corticosteroid, and a well-known adverse effect of corticosteroids is their ability to increase blood glucose levels. This occurs through various mechanisms, including increased gluconeogenesis and insulin resistance. For a patient with a history of diabetes, like Jen, this effect is particularly significant and requires close monitoring of blood glucose.

Question 164: Which mechanism underlies the bronchodilation of tiotropium?

Long-acting muscarinic receptor antagonism (Correct answer)
Mast cell stabilization
Beta-2 agonism
Leukotriene receptor blockade

Correct answer: Long-acting muscarinic receptor antagonism

Tiotropium is a LAMA that blocks muscarinic receptors in airway smooth muscle.

Question 165: A patient on phenazopyridine for urinary discomfort should be told to expect what?

Blue-green stools
Reddish-orange discoloration of urine (Correct answer)
Permanent kidney damage
Loss of taste

Correct answer: Reddish-orange discoloration of urine

Phenazopyridine harmlessly stains urine an orange-red color.

Question 166: What is the preferred treatment for a pregnant patient with a UTI in the first trimester?

Cephalexin (Correct answer)
Doxycycline
Ciprofloxacin
Nitrofurantoin

Correct answer: Cephalexin

Cephalexin is a safe first-line choice; nitrofurantoin and sulfa are avoided near term, and fluoroquinolones/tetracyclines are contraindicated.

Question 167: A 68-year-old male with a new diagnosis of heart failure with reduced ejection fraction (HFrEF) is being evaluated for initiation of guideline-directed medical therapy (GDMT). His vital signs are stable, and he is euvolemic. According to the 2024 ACC Expert Consensus Decision Pathway, which of the following represents the core foundational therapies that should be initiated?

An ACE inhibitor, a beta-blocker, a loop diuretic, and an aldosterone antagonist.
A hydralazine/isosorbide dinitrate combination, a beta-blocker, a loop diuretic, and an SGLT2 inhibitor.
An angiotensin receptor blocker (ARB), a beta-blocker, a thiazide diuretic, and digoxin.
An angiotensin receptor-neprilysin inhibitor (ARNI), an evidence-based beta-blocker, a mineralocorticoid receptor antagonist (MRA), and a sodium-glucose cotransporter-2 (SGLT2) inhibitor. (Correct answer)

Correct answer: An angiotensin receptor-neprilysin inhibitor (ARNI), an evidence-based beta-blocker, a mineralocorticoid receptor antagonist (MRA), and a sodium-glucose cotransporter-2 (SGLT2) inhibitor.

The 2024 ACC Expert Consensus Decision Pathway for HFrEF recommends initiating all four pillars of guideline-directed medical therapy (GDMT) as tolerated. These core therapies are an ARNI, an evidence-based beta-blocker, an MRA, and an SGLT2 inhibitor. This combination has been shown to significantly reduce morbidity and mortality in patients with HFrEF. While ACE inhibitors/ARBs and diuretics are used in heart failure management, the four-drug regimen listed is considered the foundational therapy.

Question 168: Under USP <797>, what is the ISO class requirement for the primary engineering control (PEC) where sterile compounding is performed?

ISO Class 9
ISO Class 8
ISO Class 7
ISO Class 5 (Correct answer)

Correct answer: ISO Class 5

The direct compounding area within the PEC must maintain ISO Class 5 air quality.

Question 169: Which of the following patient scenarios represents an absolute contraindication to the administration of a live attenuated vaccine, such as the Measles, Mumps, and Rubella (MMR) vaccine?

A 28-year-old woman who is confirmed to be pregnant. (Correct answer)
A 55-year-old man with a mild upper respiratory infection and a temperature of 99.5°F.
A 30-year-old who is currently breastfeeding her 4-month-old infant.
A 5-year-old child with a severe egg allergy, including anaphylaxis.

Correct answer: A 28-year-old woman who is confirmed to be pregnant.

Live attenuated vaccines are generally contraindicated in individuals who are severely immunocompromised or pregnant due to a theoretical risk of fetal harm. Breastfeeding is not a contraindication. A severe egg allergy is no longer considered a contraindication for the MMR vaccine. A mild illness is a precaution, not a contraindication, and vaccination can typically proceed.

Question 170: Which of the following medications has the potential to raise LDL?

Hydrochlorothiazide (Correct answer)
Amlodipine
Metoprolol
Lisinopril

Correct answer: Hydrochlorothiazide

Thiazide diuretics, such as hydrochlorothiazide, are known to have several metabolic side effects, including the potential to increase LDL cholesterol and triglyceride levels. While these effects are generally modest and dose-dependent, they are a recognized adverse effect, particularly with higher doses. The other listed medications (metoprolol, lisinopril, amlodipine) typically do not raise LDL cholesterol.

Question 171: A patient using a metered-dose inhaler with an inhaled corticosteroid should be counseled to do what after each use?

Rinse the mouth and spit to prevent oral thrush (Correct answer)
Use the inhaler only when symptoms occur
Hold breath for 1 second only
Swallow extra water with the medication

Correct answer: Rinse the mouth and spit to prevent oral thrush

Rinsing the mouth after an inhaled corticosteroid reduces the risk of oral candidiasis.

Question 172: A patient who received an MMR vaccine should avoid pregnancy for how long?

No restriction
1 year
1 week
At least 4 weeks (Correct answer)

Correct answer: At least 4 weeks

Because MMR is a live vaccine, pregnancy should be avoided for at least 4 weeks after vaccination.

Question 173: A patient on lithium starts an NSAID. What is the expected effect?

Increased lithium renal clearance
Decreased lithium levels
No change
Increased lithium levels (Correct answer)

Correct answer: Increased lithium levels

NSAIDs reduce renal lithium clearance, raising serum lithium and toxicity risk.

Question 174: According to USP Chapter <797>, which of the following represents the correct sequence for donning personal protective equipment (PPE) before entering the buffer area for sterile compounding?

Don gown, wash hands, don sterile gloves, don shoe covers.
Wash hands, don shoe covers, don gown, don sterile gloves in buffer area.
Don sterile gloves, don gown, wash hands, don hair cover.
Don shoe covers and hair cover, wash hands, don gown, apply alcohol-based hand scrub, don sterile gloves. (Correct answer)

Correct answer: Don shoe covers and hair cover, wash hands, don gown, apply alcohol-based hand scrub, don sterile gloves.

USP <797> outlines a specific garbing procedure to minimize contamination, moving from dirtiest to cleanest activities. Personnel should first don shoe covers, head/facial hair covers, and face masks. Following this, they must perform hand hygiene. After hand washing, a non-shedding gown is donned. An alcohol-based surgical hand scrub should be used before entering the buffer area. Sterile gloves are the last item to be donned, typically inside the buffer room just before compounding.

Question 175: The mechanism of action of digoxin includes:

Inhibition of Na+/K+ ATPase increasing intracellular calcium (Correct answer)
Direct ACE inhibition
Calcium channel blockade in the AV node only
Blockade of beta-1 adrenergic receptors

Correct answer: Inhibition of Na+/K+ ATPase increasing intracellular calcium

Digoxin inhibits Na+/K+ ATPase, raising intracellular calcium and increasing contractility.

Question 176: A patient is prescribed alendronate 70 mg weekly. Which statement represents the most accurate and critical counseling instruction for administering this medication?

Take the tablet at bedtime with 8 ounces of plain water to ensure it is absorbed overnight.
Take the tablet with your breakfast and a cup of coffee to make it easier to remember.
Take the tablet first thing in the morning with at least 6 ounces of plain water, and do not lie down for at least 30 minutes. (Correct answer)
Take the tablet with a full glass of milk to prevent stomach upset and remain upright for at least 15 minutes.

Correct answer: Take the tablet first thing in the morning with at least 6 ounces of plain water, and do not lie down for at least 30 minutes.

Proper administration of bisphosphonates like alendronate is critical to ensure absorption and prevent severe esophageal irritation. The medication must be taken upon waking with a full glass of plain water (not coffee, juice, or milk) at least 30 minutes before any food, drink, or other medication. The patient must also remain upright (sitting or standing) for at least 30 minutes to prevent the tablet from lodging in the esophagus.

Question 177: Which of the following describes the correct order of garbing procedures for a pharmacist entering a sterile compounding cleanroom suite, according to general USP <797> principles?

Don shoe covers, head/hair covers, and mask; perform hand hygiene; don gown; apply hand sanitizer; don sterile gloves. (Correct answer)
Perform hand hygiene, don gown, don shoe and hair covers, then don sterile gloves.
Don sterile gloves, perform hand hygiene, don gown, then don shoe and hair covers.
Don gown, don sterile gloves, perform hand hygiene, then don shoe and hair covers.

Correct answer: Don shoe covers, head/hair covers, and mask; perform hand hygiene; don gown; apply hand sanitizer; don sterile gloves.

USP <797> requires a specific garbing sequence to minimize contamination, proceeding from dirtiest to cleanest activities. Personnel first don shoe covers, head/hair covers, and a face mask in the ante-area. This is followed by hand hygiene. A non-shedding gown is donned next. Upon entering the buffer area, an alcohol-based hand rub is used before donning sterile gloves as the final step before compounding.

Question 178: Which of the following is a first-line therapy for atherosclerotic cardiovascular disease (ASCVD) prevention?

Fish oil
HMG Co-A reductase inhibitors (Correct answer)
Bile acid resins
Fibrates

Correct answer: HMG Co-A reductase inhibitors

HMG Co-A reductase inhibitors, commonly known as statins, are the cornerstone of atherosclerotic cardiovascular disease (ASCVD) prevention. They work by inhibiting the rate-limiting enzyme in cholesterol synthesis, effectively lowering LDL-C levels and reducing the risk of cardiovascular events. Major guidelines consistently recommend statins as first-line therapy for both primary and secondary prevention due to their proven efficacy.

Question 179: How many milliliters of a 50% dextrose stock solution are needed to prepare 1,000 mL of a 10% dextrose solution?

100 mL
500 mL
200 mL (Correct answer)
50 mL

Correct answer: 200 mL

Using C1V1 = C2V2: (50%)(V1) = (10%)(1000 mL), so V1 = 200 mL.

Question 180: Which receptor does ondansetron antagonize to prevent nausea?

NK1 substance P receptor
5-HT3 serotonin receptor (Correct answer)
D2 dopamine receptor
H1 histamine receptor

Correct answer: 5-HT3 serotonin receptor

Ondansetron blocks 5-HT3 receptors centrally and in the GI tract.

Question 181: Under USP <797>, how often must media-fill testing be performed for personnel compounding low- and medium-risk preparations?

Every month
Only once at hire
Every five years
At least annually (Correct answer)

Correct answer: At least annually

Media-fill testing to verify aseptic technique competency must be performed at least annually for low- and medium-risk compounding.

Question 182: An asthmatic patient using a rescue albuterol inhaler more than twice weekly indicates the need for which therapy adjustment?

Add an oral decongestant
Discontinue all therapy
Increase albuterol frequency
Add an inhaled corticosteroid (Correct answer)

Correct answer: Add an inhaled corticosteroid

Frequent rescue inhaler use signals inadequate control, requiring a controller such as an inhaled corticosteroid.

Question 183: Which of the following anti-diabetic drugs acts by reducing glucose absorption?

Empagliflozin (Correct answer)
Pioglitazone
Exenatide
Linagliptin

Correct answer: Empagliflozin

Empagliflozin is an SGLT2 inhibitor, a class of drugs that specifically target the sodium-glucose co-transporter 2 in the renal tubules. By inhibiting this transporter, SGLT2 inhibitors reduce the reabsorption of glucose back into the bloodstream, thereby increasing glucose excretion in the urine. This mechanism directly reduces glucose absorption (reabsorption) by the kidneys.

Question 184: Under USP <800>, gloves used when handling hazardous drugs should meet which standard?

ASTM D6978 chemotherapy-tested gloves (Correct answer)
Standard non-sterile exam gloves only
Reusable cloth gloves
Latex gloves of any thickness

Correct answer: ASTM D6978 chemotherapy-tested gloves

HD handling requires chemotherapy gloves tested per ASTM D6978 for permeation resistance.

Question 185: Which counseling point is appropriate for a patient using a fluoroquinolone such as ciprofloxacin?

It is safe in all children
Report tendon pain and avoid taking with dairy or antacids near the dose (Correct answer)
Take with antacids for best absorption
Increase sun exposure to boost effect

Correct answer: Report tendon pain and avoid taking with dairy or antacids near the dose

Fluoroquinolones carry a tendon rupture risk and chelate with cations that reduce absorption.

Question 186: A patient on simvastatin 40 mg is started on which medication that requires lowering the simvastatin dose due to interaction?

Metoprolol
Aspirin
Furosemide
Amlodipine (Correct answer)

Correct answer: Amlodipine

Amlodipine inhibits simvastatin metabolism, so simvastatin should not exceed 20 mg daily when combined.

Question 187: A 58-year-old patient is started on isoniazid (INH) for latent tuberculosis. Which supplement should routinely be co-administered to prevent a common dose-dependent adverse effect?

Vitamin B6 (pyridoxine) (Correct answer)
Folic acid
Vitamin D
Vitamin B12 (cyanocobalamin)

Correct answer: Vitamin B6 (pyridoxine)

INH inhibits pyridoxine (B6) metabolism, which can lead to peripheral neuropathy, particularly in high-risk groups (elderly, malnourished, diabetic, pregnant). Pyridoxine 25–50 mg daily is co-prescribed to prevent this toxicity.

Question 188: A physician orders an IV infusion of dopamine at 7 mcg/kg/min for a patient weighing 187 lbs. The pharmacy provides a dopamine drip of 400 mg in 250 mL of D5W. At what rate, in mL/hr, should the infusion pump be set?

45.2 mL/hr
22.6 mL/hr (Correct answer)
33.8 mL/hr
15.1 mL/hr

Correct answer: 22.6 mL/hr

First, convert the patient's weight from pounds to kilograms: 187 lbs / 2.2 lbs/kg = 85 kg. Next, calculate the total dose in mcg per minute: 85 kg * 7 mcg/kg/min = 595 mcg/min. Then, convert the dose from mcg/min to mg/hr: 595 mcg/min * 60 min/hr / 1000 mcg/mg = 35.7 mg/hr. Now, determine the concentration of the dopamine solution: 400 mg / 250 mL = 1.6 mg/mL. Finally, calculate the infusion rate in mL/hr: 35.7 mg/hr / 1.6 mg/mL = 22.31 mL/hr, which rounds to 22.3 mL/hr. Among the choices, 22.6 mL/hr is the closest answer.

Question 189: Which mechanism underlies the bronchodilation produced by albuterol?

Leukotriene receptor blockade
Beta-2 adrenergic receptor agonism increasing cAMP (Correct answer)
Muscarinic receptor antagonism
Phosphodiesterase inhibition

Correct answer: Beta-2 adrenergic receptor agonism increasing cAMP

Albuterol stimulates beta-2 receptors, raising cAMP and relaxing airway smooth muscle.

Question 190: A patient is to receive 1 liter of D5W over 10 hours. The IV administration set delivers 15 gtt/mL. What is the flow rate in drops per minute (gtt/min)?

30 gtt/min
25 gtt/min (Correct answer)
21 gtt/min
17 gtt/min

Correct answer: 25 gtt/min

First, calculate the flow rate in mL/hr: 1000 mL / 10 hours = 100 mL/hr. Next, convert mL/hr to mL/min: 100 mL/hr / 60 min/hr = 1.67 mL/min. Finally, calculate the flow rate in gtt/min using the drop factor: 1.67 mL/min * 15 gtt/mL = 25 gtt/min.

Question 191: A pharmacist needs to prepare 120 g of a 2.5% hydrocortisone cream by mixing 1% and 5% hydrocortisone creams. How many grams of the 5% cream are required?

45 g (Correct answer)
75 g
60 g
30 g

Correct answer: 45 g

This is an alligation problem. Set up the alligation grid. The desired percentage (2.5%) is in the center. The higher (5%) and lower (1%) concentrations are on the left. Subtract diagonally: 2.5 - 1 = 1.5 (parts of 5% cream) and 5 - 2.5 = 2.5 (parts of 1% cream). The total parts are 1.5 + 2.5 = 4 parts. The proportion of the 5% cream needed is 1.5/4. Calculate the amount needed: (1.5 / 4) * 120 g = 45 g.

Question 192: What is the primary mechanism by which NSAIDs increase the toxicity of low-dose methotrexate?

Increasing GI absorption of methotrexate
Inducing methotrexate hepatic metabolism
Competing with methotrexate for renal tubular secretion (Correct answer)
Displacing methotrexate from plasma protein binding sites

Correct answer: Competing with methotrexate for renal tubular secretion

NSAIDs compete with methotrexate for renal tubular secretion via OAT transporters, reducing its elimination and causing dangerous accumulation and toxicity.

Question 193: Which medication class is first-line for chronic management of stable heart failure with reduced ejection fraction?

Class I antiarrhythmics
ACE inhibitors/ARBs (Correct answer)
Alpha-1 blockers
Calcium channel blockers

Correct answer: ACE inhibitors/ARBs

RAAS inhibitors (ACEi/ARB/ARNI) plus beta-blockers form the mortality-reducing foundation of HFrEF therapy.

Question 194: A patient with newly diagnosed stage 2 hypertension and no compelling indications has a blood pressure of 162/98 mmHg. What is the preferred initial pharmacologic approach?

A loop diuretic plus a beta-blocker
Single low-dose thiazide only
Two first-line agents from different classes (Correct answer)
An alpha-blocker monotherapy

Correct answer: Two first-line agents from different classes

Stage 2 hypertension generally warrants initiating two first-line antihypertensives of different classes to reach goal blood pressure.

Question 195: A 72-year-old patient is starting apixaban for stroke prevention in nonvalvular atrial fibrillation. When counseling the patient, which of the following points is MOST critical to emphasize?

Avoid co-administration with NSAIDs like ibuprofen without consulting a provider.
Take the medication at the same times each day to maintain consistent blood levels.
To seek immediate medical attention for signs of major bleeding, such as red or black tarry stools. (Correct answer)
Do not stop taking the medication abruptly as this can increase the risk of stroke.

Correct answer: To seek immediate medical attention for signs of major bleeding, such as red or black tarry stools.

While all points are important for counseling on apixaban, the most critical for immediate patient safety is recognizing and acting on signs of major bleeding. A gastrointestinal bleed, indicated by red or black tarry stools, can be life-threatening and requires immediate medical intervention. The other points relate to adherence, drug interactions, and long-term risks, which are crucial but secondary to the acute danger of a major bleed.

Question 196: Which antipsychotic medication requires mandatory enrollment in a Risk Evaluation and Mitigation Strategy (REMS) program due to the risk of severe agranulocytosis?

Quetiapine
Olanzapine
Aripiprazole
Clozapine (Correct answer)

Correct answer: Clozapine

Clozapine carries a black box warning for potentially fatal agranulocytosis and requires the Clozapine REMS Program, which mandates ANC monitoring before dispensing. No other antipsychotic has this requirement.

Question 197: Which of the following represents the correct calculation for the osmolarity (mOsmol/L) of a 3% hypertonic saline (NaCl) solution? (MW of Na = 23, MW of Cl = 35.5)

(3 g/L / 58.5 g/mol) * 2 * 1000
(30 g/L / 58.5 g/mol) * 2 * 1000 (Correct answer)
(30 g/L / 94.5 g/mol) * 2 * 1000
(30 g/L / 58.5 g/mol) * 1 * 1000

Correct answer: (30 g/L / 58.5 g/mol) * 2 * 1000

Osmolarity (mOsmol/L) = (Concentration in g/L / MW in g/mol) * number of species * 1000. A 3% solution is 3 g/100 mL, which is 30 g/L. The molecular weight (MW) of NaCl is 23 + 35.5 = 58.5 g/mol. NaCl dissociates into 2 species (Na+ and Cl-). Therefore, the correct calculation is (30 g/L / 58.5 g/mol) * 2 * 1000.

Question 198: Which mechanism best describes the action of montelukast?

Beta-2 agonism
Mast cell stabilization
Leukotriene receptor antagonism (Correct answer)
Anti-IgE monoclonal antibody

Correct answer: Leukotriene receptor antagonism

Montelukast blocks the CysLT1 leukotriene receptor, reducing bronchoconstriction and inflammation.

Question 199: Which counseling point is correct for a patient prescribed alendronate for osteoporosis?

Take with a full glass of water and remain upright for 30 minutes (Correct answer)
Take at bedtime with a snack
Lie down immediately after dosing
Take with calcium supplement simultaneously

Correct answer: Take with a full glass of water and remain upright for 30 minutes

Alendronate must be taken with water on an empty stomach, staying upright to prevent esophageal irritation.

Question 200: Which of the following types of data are ordinal?

NYHA I-IV
Improvement Yes/No
Sex
Grade of breast cancer (Correct answer)

Correct answer: Grade of breast cancer

Ordinal data is a type of categorical data where the categories have a natural, meaningful order or ranking, but the differences between categories are not necessarily equal. The grade of breast cancer (e.g., Grade 1, 2, 3) exemplifies ordinal data because it represents increasing severity or aggressiveness in a ranked sequence. Other options like sex or improvement (yes/no) are nominal, lacking an inherent order.

Question 201: A patient on warfarin starts amiodarone. What is the primary mechanism of the resulting increased INR?

Inhibition of CYP2C9 metabolism of warfarin (Correct answer)
Induction of vitamin K epoxide reductase
Increased renal clearance of warfarin
Displacement of warfarin from albumin only

Correct answer: Inhibition of CYP2C9 metabolism of warfarin

Amiodarone inhibits CYP2C9 (and CYP3A4), reducing warfarin metabolism and raising INR.

Question 202: GLP-1 receptor agonists (e.g., semaglutide) lower glucose by:

Enhancing glucose-dependent insulin secretion and slowing gastric emptying (Correct answer)
Blocking SGLT2
Inhibiting alpha-glucosidase
Inhibiting DPP-4 directly

Correct answer: Enhancing glucose-dependent insulin secretion and slowing gastric emptying

GLP-1 agonists augment glucose-dependent insulin release, suppress glucagon, and slow gastric emptying.

Question 203: A 58-year-old with type 2 diabetes, eGFR 28 mL/min, and HbA1c 8.9% is on metformin. What is the most appropriate change to the treatment plan?

Continue metformin and add a sulfonylurea
Discontinue metformin and add a GLP-1 receptor agonist or insulin (Correct answer)
Increase metformin to maximum dose
Discontinue metformin and start a SGLT2 inhibitor

Correct answer: Discontinue metformin and add a GLP-1 receptor agonist or insulin

Metformin is contraindicated when eGFR is below 30 mL/min due to lactic acidosis risk, so it should be stopped and replaced with an agent safe in renal impairment.

Question 204: During a prospective drug utilization review (DUR), a pharmacist notes a prescription for rosuvastatin for a patient currently taking gemfibrozil. Which of the following drug therapy problems should the pharmacist identify?

A dose that is too low to be effective
Unnecessary drug therapy
A significant drug-drug interaction increasing the risk of myopathy (Correct answer)
Therapeutic duplication

Correct answer: A significant drug-drug interaction increasing the risk of myopathy

The concurrent use of gemfibrozil with statins, particularly rosuvastatin, significantly increases the risk of severe myopathy and rhabdomyolysis. Gemfibrozil inhibits the metabolism of statins, leading to higher systemic concentrations. This combination is generally contraindicated or requires extreme caution with very low statin doses and close monitoring. This represents a critical safety issue that must be addressed before dispensing.

Question 205: A patient with a confirmed penicillin anaphylaxis history needs treatment for streptococcal pharyngitis. Which is the safest choice?

Amoxicillin
Cephalexin
Azithromycin (Correct answer)
Ampicillin

Correct answer: Azithromycin

With a history of penicillin anaphylaxis, a macrolide such as azithromycin avoids cross-reactivity concerns.

Question 206: A patient taking metformin is scheduled for a contrast CT scan. What is the appropriate plan?

Continue metformin without changes
Hold metformin around contrast and reassess renal function (Correct answer)
Permanently discontinue metformin
Double the metformin dose

Correct answer: Hold metformin around contrast and reassess renal function

Metformin is held around iodinated contrast to reduce the risk of lactic acidosis if renal function declines.

Question 207: Which therapy is most appropriate first-line for a patient with a new VTE and normal renal function who prefers oral therapy without monitoring?

Aspirin alone
Subcutaneous heparin indefinitely
A direct oral anticoagulant such as rivaroxaban (Correct answer)
Warfarin with frequent INR checks

Correct answer: A direct oral anticoagulant such as rivaroxaban

DOACs are preferred first-line for VTE in patients without contraindications and require no routine monitoring.

Question 208: Phenytoin exhibits which pharmacokinetic property at therapeutic doses?

No protein binding
First-order elimination only
Zero-order (nonlinear) elimination (Correct answer)
Renal elimination unchanged

Correct answer: Zero-order (nonlinear) elimination

Phenytoin shows saturable metabolism, so small dose changes cause large level swings.

Question 209: When preparing an admixture, what is 'coring' and how is it minimized?

Air bubble formation; minimized by shaking
Dislodging a rubber fragment into the vial; minimized by inserting the needle bevel up at an angle (Correct answer)
Light degradation; minimized by amber bags
Drug precipitation; minimized by warming

Correct answer: Dislodging a rubber fragment into the vial; minimized by inserting the needle bevel up at an angle

Coring is a rubber-stopper fragment dislodged into the vial, reduced by inserting the needle bevel-up at a 45–60° angle and applying gentle pressure.

Question 210: A patient on a DOAC needs an urgent reversal before emergency surgery. Which reversal agent matches dabigatran?

Andexanet alfa
Idarucizumab (Correct answer)
Vitamin K
Protamine

Correct answer: Idarucizumab

Idarucizumab is the specific reversal agent for the direct thrombin inhibitor dabigatran.

Question 211: A patient with rheumatoid arthritis has inadequate control on methotrexate monotherapy. What is an appropriate next step?

Switch to NSAIDs alone
Discontinue all DMARDs
Add a TNF inhibitor or other biologic DMARD (Correct answer)
Start chronic high-dose prednisone monotherapy

Correct answer: Add a TNF inhibitor or other biologic DMARD

Inadequate response to methotrexate warrants adding a biologic such as a TNF inhibitor to achieve disease control.

Question 212: A patient with newly diagnosed HIV is to start an integrase inhibitor regimen. Which baseline test guides whether abacavir can be safely used?

Serum ferritin
TSH level
G6PD activity
HLA-B*5701 testing (Correct answer)

Correct answer: HLA-B*5701 testing

Abacavir hypersensitivity is strongly associated with HLA-B*5701, so screening is required before use.

Question 213: What is the purpose of a 0.22-micron filter in sterile compounding?

Adding preservatives
Concentrating the drug
Sterilizing filtration to remove bacteria from a solution (Correct answer)
Removing dissolved gases

Correct answer: Sterilizing filtration to remove bacteria from a solution

A 0.22-micron filter provides sterilizing-grade filtration by removing bacteria from a solution.

Question 214: A patient on warfarin needs an antibiotic. Which choice carries the HIGHEST risk of increasing INR?

Azithromycin
Nitrofurantoin
Trimethoprim-sulfamethoxazole (Correct answer)
Cephalexin

Correct answer: Trimethoprim-sulfamethoxazole

Trimethoprim-sulfamethoxazole inhibits CYP2C9 and displaces warfarin from protein, markedly raising INR.

Question 215: Beta-blockers mask most adrenergic symptoms of hypoglycemia. Which symptom is notably PRESERVED because it is mediated by the cholinergic nervous system?

Tremor
Palpitations
Diaphoresis (sweating) (Correct answer)
Tachycardia

Correct answer: Diaphoresis (sweating)

Beta-blockers block adrenergically mediated hypoglycemia symptoms (tachycardia, tremor, palpitations) but diaphoresis is mediated by cholinergic sympathetic fibers that are unaffected by beta-blockade, making sweating a useful remaining warning sign.

Question 216: On a patient weighing 125 pounds, an order for heparin 18 units per kg per hour is received. The IV bag has a 50-unit-per-milliliter concentration. Calculate the rate of infusion in mL/hr.

40.9 mls/hr
18 mls/hr
20.45 mls/hr (Correct answer)
10.23 mls/hr

Correct answer: 20.45 mls/hr

First, convert the patient's weight from pounds to kilograms: 125 lbs / 2.2 lbs/kg = 56.82 kg. Next, calculate the total heparin units needed per hour: 18 units/kg/hr * 56.82 kg = 1022.76 units/hr. Finally, divide the total units per hour by the concentration of the IV bag to find the infusion rate in mL/hr: 1022.76 units/hr / 50 units/mL = 20.4552 mL/hr, which rounds to 20.45 mL/hr.

Question 217: SGLT2 inhibitors like empagliflozin lower glucose by:

Activating AMPK in the liver
Inhibiting alpha-glucosidase
Stimulating pancreatic insulin secretion
Blocking glucose reabsorption in the proximal tubule (Correct answer)

Correct answer: Blocking glucose reabsorption in the proximal tubule

SGLT2 inhibitors promote urinary glucose excretion via the proximal tubule.

Question 218: A patient with hyperkalemia (K 6.2) and ECG changes should first receive which agent to stabilize the myocardium?

Sodium polystyrene sulfonate
Calcium gluconate (Correct answer)
Insulin and dextrose
Albuterol

Correct answer: Calcium gluconate

IV calcium gluconate stabilizes the cardiac membrane immediately, even though it does not lower potassium.

Question 219: A patient on chronic opioid therapy for cancer pain reports constant constipation. What is the most appropriate addition to the plan?

A scheduled stimulant laxative with a stool softener (Correct answer)
Loperamide
A bulk-forming fiber laxative alone
No intervention as tolerance develops

Correct answer: A scheduled stimulant laxative with a stool softener

Opioid-induced constipation does not improve with tolerance and is best managed with a scheduled stimulant laxative plus a softener.

Question 220: A pharmacist is explaining a new, complex insulin regimen to an elderly patient who appears to be nodding along but seems hesitant. Which of the following is the BEST approach to confirm the patient's understanding?

Provide the patient with a large-print handout that reviews all the steps.
Ask a family member to come in to ensure the instructions are followed correctly.
Ask the patient, "Do you have any questions about these instructions?"
Say, "Just to be sure I did a good job explaining, can you tell me in your own words how you will take your insulin?" (Correct answer)

Correct answer: Say, "Just to be sure I did a good job explaining, can you tell me in your own words how you will take your insulin?"

This is an example of the teach-back method. It is a non-shaming way to assess a patient's understanding by asking them to explain the instructions in their own words. It places the responsibility on the pharmacist for clear communication ("to be sure I did a good job explaining"). Asking "Do you have any questions?" often elicits a simple "no" response, even if the patient is confused. While handouts and family involvement are helpful aids, they do not directly confirm the patient's own comprehension in the moment.

Question 221: What does a media-fill test specifically evaluate?

The pH of the IV solution
The HEPA filter integrity
The compounder's aseptic technique using microbial growth media (Correct answer)
The potency of the final drug

Correct answer: The compounder's aseptic technique using microbial growth media

A media-fill test substitutes a sterile growth medium for drug to challenge and verify the operator's aseptic technique.

Question 222: Which oral anticoagulant requires renal dose adjustment and is reversed by idarucizumab?

Apixaban
Rivaroxaban
Dabigatran (Correct answer)
Warfarin

Correct answer: Dabigatran

Dabigatran is renally cleared and specifically reversed by idarucizumab.

Question 223: A patient taking high-dose corticosteroids (20 mg prednisone daily for 3 weeks) should avoid which vaccine?

Inactivated influenza vaccine
MMR (Correct answer)
Hepatitis A vaccine
Pneumococcal conjugate vaccine

Correct answer: MMR

Live vaccines like MMR are contraindicated in patients on high-dose immunosuppressive corticosteroid therapy.

Question 224: A patient was dispensed the wrong strength of warfarin, but the error was caught by the patient before any harm occurred. The pharmacy manager decides to conduct a root cause analysis (RCA). Which of the following is the main objective of this process?

To determine the appropriate disciplinary action for the staff member involved.
To complete the required paperwork for the pharmacy's liability insurance carrier.
To exclusively focus on retraining the individual who made the final check on the prescription.
To identify system-level vulnerabilities and process failures that allowed the error to happen. (Correct answer)

Correct answer: To identify system-level vulnerabilities and process failures that allowed the error to happen.

A root cause analysis (RCA) is a systematic, non-punitive process focused on identifying the underlying system and process failures that led to an error, rather than blaming an individual. The goal is to understand 'why' the system failed so that effective preventative actions can be implemented to reduce the likelihood of recurrence.

Question 225: The anxiolytic and sedative effects of diazepam are produced by which of the following molecular actions on the GABA-A receptor?

Potentiating the effects of GABA by increasing the frequency of chloride channel opening. (Correct answer)
Directly activating the GABA-A receptor in the absence of GABA.
Blocking the reuptake of GABA from the synaptic cleft.
Increasing the duration of chloride channel opening when GABA is bound.

Correct answer: Potentiating the effects of GABA by increasing the frequency of chloride channel opening.

Benzodiazepines like diazepam are positive allosteric modulators of the GABA-A receptor. They bind to a site distinct from the GABA binding site, which increases the receptor's affinity for GABA. This potentiation results in an increased frequency of chloride ion channel opening when GABA is bound, leading to enhanced neuronal inhibition and producing anxiolytic and sedative effects.

NAPLEX (North American Pharmacist Licensure) Exam

The NAPLEX (North American Pharmacist Licensure Examination) is administered by the National Association of Boards of Pharmacy (NABP). The exam consists of 225 multiple-choice questions (200 scored, 25 unscored pretest items) with a 6-hour time limit. A scaled passing score of 75 is required. The exam covers six competency areas including pharmaceutical calculations, pharmacology and mechanism of action, therapeutic plan assessment, medication safety, patient counseling, and sterile/non-sterile compounding.

225

Questions

360 min

Time Limit

75%

To Pass

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