Pharmacological and Parenteral Therapies — Questions and Answers
Question 1: What is the purpose of pharmacokinetics in nursing practice?
- To determine the drug's effectiveness
- To understand how the drug is absorbed, distributed, metabolized, and excreted (Correct answer)
- To identify side effects of the drug
- To administer medication without understanding its action
Correct answer: To understand how the drug is absorbed, distributed, metabolized, and excreted
Pharmacokinetics describes the movement of drugs within the body, encompassing the processes of absorption, distribution, metabolism, and excretion (ADME). Understanding these processes allows nurses to predict how a drug will behave in a patient, optimize dosing, minimize adverse effects, and ensure therapeutic efficacy. It is fundamental to safe and effective medication administration.
Question 2: Which of the following is a common side effect of opioid medications?
- Increased blood pressure
- Constipation and sedation (Correct answer)
- Increased heart rate
- Diarrhea and weight loss
Correct answer: Constipation and sedation
Opioid medications work by binding to opioid receptors in the central nervous system and gastrointestinal tract. Common side effects include constipation due to decreased gut motility and sedation due to central nervous system depression. Nurses must monitor for these effects and implement interventions, such as stool softeners or fall precautions, to ensure patient comfort and safety.
Question 3: What is the proper method for administering an intramuscular (IM) injection?
- Injecting at a 45-degree angle into the muscle
- Injecting at a 90-degree angle into the muscle (Correct answer)
- Injecting at a 15-degree angle into the subcutaneous tissue
- Injecting into the vein at a shallow angle
Correct answer: Injecting at a 90-degree angle into the muscle
Intramuscular (IM) injections are administered at a 90-degree angle to ensure the medication reaches the deep muscle tissue, where it can be absorbed effectively. This angle is crucial for proper drug delivery and to minimize the risk of injecting into subcutaneous tissue or hitting nerves or blood vessels. The choice of needle length also depends on the patient's muscle mass and the injection site.
Question 4: Which of the following is an example of parenteral medication administration?
- Oral medication
- Intravenous (IV) injection (Correct answer)
- Topical cream
- Inhalation medication
Correct answer: Intravenous (IV) injection
Parenteral medication administration refers to routes that bypass the gastrointestinal tract, meaning the medication is delivered directly into the body tissues or bloodstream. Intravenous (IV) injection is a prime example, as the medication is injected directly into a vein, providing rapid systemic effects. Oral, topical, and inhalation routes are not considered parenteral.
Question 5: Which of the following is a common reason for administering a medication via the subcutaneous route?
- For medications that need to act quickly
- For medications that need to be absorbed slowly over time (Correct answer)
- For high doses of medication
- For medications that need to be absorbed in the stomach
Correct answer: For medications that need to be absorbed slowly over time
The subcutaneous route is chosen for medications that require slow, sustained absorption into the bloodstream. The subcutaneous tissue has a rich blood supply but less than muscle, allowing for a gradual release of the drug. This route is commonly used for medications like insulin, heparin, and some vaccines, providing a prolonged therapeutic effect.
Question 6: What is the role of the nurse in administering insulin injections?
- To determine the insulin dose without consulting the physician
- To assess the patient's blood sugar level and administer insulin accordingly (Correct answer)
- To administer insulin at random times of the day
- To use insulin for all patients, regardless of their condition
Correct answer: To assess the patient's blood sugar level and administer insulin accordingly
The nurse's role in insulin administration is critical for patient safety and effective blood glucose management. This includes accurately assessing the patient's current blood sugar level, verifying the correct insulin type and dose against the physician's order, and administering it precisely. This ensures appropriate blood sugar control and prevents dangerous fluctuations like hypo- or hyperglycemia.
Question 7: Which of the following medications should be administered with caution due to the risk of causing renal toxicity?
- Acetaminophen
- Aminoglycoside antibiotics (Correct answer)
- Penicillin
- Ibuprofen
Correct answer: Aminoglycoside antibiotics
Aminoglycoside antibiotics, such as gentamicin and tobramycin, are known for their potential to cause nephrotoxicity (renal toxicity) and ototoxicity (ear toxicity). Nurses must administer these medications with extreme caution, closely monitor kidney function tests (e.g., creatinine, BUN), and ensure therapeutic drug levels to minimize adverse effects and protect patient organs.
Question 8: How should a nurse manage a patient who is receiving intravenous (IV) fluids?
- Monitor the IV site for signs of infiltration or infection (Correct answer)
- Change the IV site every 48 hours, regardless of condition
- Administer fluids without regard to the patient's condition
- Increase the flow rate to ensure faster administration
Correct answer: Monitor the IV site for signs of infiltration or infection
When a patient is receiving intravenous (IV) fluids, the nurse's primary responsibility is to continuously monitor the IV insertion site for complications. Signs of infiltration include swelling, coolness, and pain, while infection signs include redness, warmth, and purulent drainage. Early detection and intervention prevent serious harm and ensure the effectiveness of the therapy.
Question 9: What is the nurse's role in educating a patient about a new medication?
- Only explaining the brand name of the medication
- Providing information on how the medication works, side effects, and proper administration (Correct answer)
- Allowing the patient to figure out how to take the medication
- Telling the patient to consult a pharmacist for all medication questions
Correct answer: Providing information on how the medication works, side effects, and proper administration
Patient education about new medications is a vital nursing responsibility. The nurse must provide comprehensive information, including the medication's purpose, how it works, potential side effects, and correct administration techniques (e.g., dosage, timing, special instructions). This empowers patients to safely and effectively manage their own medication regimen and promotes adherence.
Pharmacological and Parenteral Therapies
What is the purpose of pharmacokinetics in nursing practice?