ExCPT Pharmacology MCQ — Questions and Answers
Question 1: Which of the following is a common pharmacologic effect of beta-blockers such as metoprolol?
- Increase heart rate and cardiac output.
- Decrease heart rate and blood pressure. (Correct answer)
- Stimulate insulin secretion in the pancreas.
- Cause bronchodilation in the lungs.
Correct answer: Decrease heart rate and blood pressure.
Beta-blockers like metoprolol work by blocking beta-adrenergic receptors, primarily in the heart. This action reduces the heart's workload by decreasing heart rate and myocardial contractility. Consequently, this leads to a reduction in blood pressure and cardiac output.
Question 2: Lisinopril, commonly dispensed by pharmacy technicians, belongs to which drug class?
- Calcium channel blocker
- Angiotensin-converting enzyme (ACE) inhibitor (Correct answer)
- Thiazide diuretic
- Beta-adrenergic agonist
Correct answer: Angiotensin-converting enzyme (ACE) inhibitor
Lisinopril is an Angiotensin-Converting Enzyme (ACE) inhibitor, identifiable by its '-pril' suffix. ACE inhibitors work by blocking the enzyme that converts angiotensin I to angiotensin II, a potent vasoconstrictor. This leads to vasodilation and a decrease in blood pressure, making them effective for hypertension and heart failure.
Question 3: Which statement best describes the pharmacology of a Schedule II opioid such as oxycodone?
- They are non-psychoactive and available over-the-counter.
- They provide mild pain relief with no abuse potential.
- They provide strong analgesia with high abuse potential. (Correct answer)
- They are primarily used as antibiotics for infections.
Correct answer: They provide strong analgesia with high abuse potential.
Schedule II opioids, such as oxycodone, are potent analgesics used for severe pain. Due to their strong pain-relieving properties and significant effects on the central nervous system, they carry a high potential for abuse and physical or psychological dependence. This classification reflects their therapeutic benefits alongside their inherent risks.
Question 4: Which of the following is a key counseling point for a patient starting warfarin therapy?
- Increase vitamin K foods dramatically every week.
- Avoid all blood tests while taking warfarin.
- Maintain a consistent intake of vitamin K–containing foods. (Correct answer)
- Stop the medication if minor bruising occurs once.
Correct answer: Maintain a consistent intake of vitamin K–containing foods.
Warfarin is an anticoagulant that works by interfering with vitamin K-dependent clotting factors. Therefore, maintaining a consistent intake of vitamin K-containing foods is crucial to ensure stable therapeutic effects and prevent fluctuations in its effectiveness. Significant changes in vitamin K intake can either increase the risk of bleeding or reduce the drug's efficacy.
Question 5: Which dosage form is specifically designed to release medication slowly over an extended period?
- Immediate-release tablet
- Enteric-coated tablet
- Extended-release tablet or capsule (Correct answer)
- Oral solution
Correct answer: Extended-release tablet or capsule
Extended-release (ER) or sustained-release (SR) tablets and capsules are specifically formulated to release medication slowly over an extended period. This design allows for less frequent dosing, maintains more consistent drug levels in the body, and can improve patient adherence. Other dosage forms like immediate-release or enteric-coated tablets have different release profiles.
Question 6: A patient with type 2 diabetes is prescribed metformin. What is a common gastrointestinal side effect that technicians should recognize?
- Severe hair loss
- Persistent diarrhea or stomach upset (Correct answer)
- Yellowing of the eyes overnight
- Sudden hearing loss
Correct answer: Persistent diarrhea or stomach upset
Metformin, a common medication for type 2 diabetes, frequently causes gastrointestinal side effects, especially when treatment is initiated. Patients often experience persistent diarrhea, nausea, vomiting, or stomach upset. These symptoms can often be mitigated by starting with a low dose and gradually increasing it, or by taking the medication with food.
Question 7: Which term describes the process by which a drug is chemically changed by the body, usually in the liver?
- Absorption
- Distribution
- Metabolism (Correct answer)
- Excretion
Correct answer: Metabolism
Metabolism is the process by which drugs are chemically altered in the body, primarily by enzymes in the liver. This transformation typically converts drugs into more water-soluble compounds, facilitating their excretion from the body. It is a key phase in pharmacokinetics, influencing a drug's duration of action and elimination.
Question 8: Which of the following antihypertensive medications is classified as a calcium channel blocker?
- Amlodipine (Correct answer)
- Losartan
- Hydrochlorothiazide
- Lisinopril
Correct answer: Amlodipine
Amlodipine is classified as a calcium channel blocker, specifically a dihydropyridine type, identifiable by its '-dipine' suffix. These medications work by relaxing the smooth muscles in blood vessel walls, leading to vasodilation and a reduction in blood pressure. They are commonly used to treat hypertension and angina.
Question 9: A pharmacy technician notices a prescription for simvastatin at bedtime. What is the main therapeutic purpose of this medication?
- Treat acute migraine headaches.
- Reduce blood glucose levels quickly.
- Lower cholesterol to reduce cardiovascular risk. (Correct answer)
- Provide rapid relief of heartburn.
Correct answer: Lower cholesterol to reduce cardiovascular risk.
Simvastatin is a statin medication, which belongs to the class of HMG-CoA reductase inhibitors. Its primary therapeutic purpose is to lower cholesterol levels in the blood, particularly LDL ('bad') cholesterol. By reducing cholesterol, simvastatin helps to decrease the risk of cardiovascular events such as heart attacks and strokes.
ExCPT Pharmacology MCQ
Which of the following is a common pharmacologic effect of beta-blockers such as metoprolol?