NURS 5663 Pharm Weekly Quizzes | Week 1-6 | Questions
and Answers with Rationales | 2026 Updated | 100% Correct
- TWU.
Course
NURS 5663
1. A patient asks why two medications with the same dose can produce different effects.
Which pharmacokinetic factor best explains differences in drug exposure?
A. Drug color
B. Absorption, distribution, metabolism, and excretion
C. Tablet shape
D. Medication packaging
Answer: B. Absorption, distribution, metabolism, and excretion
Rationale: Pharmacokinetics describes what the body does to a drug, including absorption,
distribution, metabolism, and excretion. Differences in these processes can alter drug
concentrations and clinical effects.
2. Which pharmacokinetic process primarily occurs in the liver through drug-metabolizing
enzymes?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C. Metabolism
Rationale: The liver is a major site of drug metabolism. Hepatic enzymes can transform
medications into metabolites that may be active, inactive, or toxic.
3. A medication has a half-life of 8 hours. Approximately how long will it generally take for
most of the drug to be eliminated after stopping therapy?
A. 8 hours
B. 16 hours
,C. 24 hours
D. 32–40 hours
Answer: D. 32–40 hours
Rationale: A common pharmacokinetic approximation is about 4–5 half-lives for near-complete
elimination. Five 8-hour half-lives equal approximately 40 hours.
4. Which patient characteristic is most likely to increase the risk of toxicity from a renally
eliminated medication?
A. Increased muscle mass
B. Reduced renal function
C. Increased appetite
D. Mild seasonal allergies
Answer: B. Reduced renal function
Rationale: Impaired renal clearance can cause medications or active metabolites to accumulate,
increasing the risk of adverse effects and toxicity.
5. What does a medication's therapeutic index primarily describe?
A. How quickly the drug is absorbed
B. The relationship between toxic and therapeutic doses
C. The duration of tablet dissolution
D. The percentage of the dose excreted in stool
Answer: B. The relationship between toxic and therapeutic doses
Rationale: The therapeutic index provides an indication of a medication's safety margin. Drugs
with a narrow therapeutic index require particularly careful dosing and monitoring.
Week 2 — Pharmacodynamics & Drug Interactions
6. A medication binds to a receptor and produces a maximal biological response. How is the
medication best classified?
A. Antagonist
B. Partial agonist
, C. Full agonist
D. Inverse transporter
Answer: C. Full agonist
Rationale: A full agonist binds to a receptor and activates it to produce the maximum response
associated with that receptor system.
7. What is the primary action of a competitive receptor antagonist?
A. Permanently destroys the receptor
B. Competes with an agonist for receptor binding
C. Increases agonist absorption
D. Converts an agonist into a metabolite
Answer: B. Competes with an agonist for receptor binding
Rationale: Competitive antagonists compete with agonists at the same receptor site and can
reduce the agonist's effect.
8. A patient takes two medications that both depress central nervous system activity. What
type of interaction is most concerning?
A. Additive or synergistic CNS depression
B. Increased renal filtration
C. Reduced protein binding only
D. Increased gastrointestinal motility
Answer: A. Additive or synergistic CNS depression
Rationale: Drugs with overlapping CNS-depressant effects can produce excessive sedation,
respiratory depression, impaired coordination, or loss of consciousness.
9. Which statement best describes pharmacodynamics?
A. What the body does to a medication
B. What a medication does to the body
C. How a medication is packaged
D. How a prescription is transmitted
Answer: B. What a medication does to the body
and Answers with Rationales | 2026 Updated | 100% Correct
- TWU.
Course
NURS 5663
1. A patient asks why two medications with the same dose can produce different effects.
Which pharmacokinetic factor best explains differences in drug exposure?
A. Drug color
B. Absorption, distribution, metabolism, and excretion
C. Tablet shape
D. Medication packaging
Answer: B. Absorption, distribution, metabolism, and excretion
Rationale: Pharmacokinetics describes what the body does to a drug, including absorption,
distribution, metabolism, and excretion. Differences in these processes can alter drug
concentrations and clinical effects.
2. Which pharmacokinetic process primarily occurs in the liver through drug-metabolizing
enzymes?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C. Metabolism
Rationale: The liver is a major site of drug metabolism. Hepatic enzymes can transform
medications into metabolites that may be active, inactive, or toxic.
3. A medication has a half-life of 8 hours. Approximately how long will it generally take for
most of the drug to be eliminated after stopping therapy?
A. 8 hours
B. 16 hours
,C. 24 hours
D. 32–40 hours
Answer: D. 32–40 hours
Rationale: A common pharmacokinetic approximation is about 4–5 half-lives for near-complete
elimination. Five 8-hour half-lives equal approximately 40 hours.
4. Which patient characteristic is most likely to increase the risk of toxicity from a renally
eliminated medication?
A. Increased muscle mass
B. Reduced renal function
C. Increased appetite
D. Mild seasonal allergies
Answer: B. Reduced renal function
Rationale: Impaired renal clearance can cause medications or active metabolites to accumulate,
increasing the risk of adverse effects and toxicity.
5. What does a medication's therapeutic index primarily describe?
A. How quickly the drug is absorbed
B. The relationship between toxic and therapeutic doses
C. The duration of tablet dissolution
D. The percentage of the dose excreted in stool
Answer: B. The relationship between toxic and therapeutic doses
Rationale: The therapeutic index provides an indication of a medication's safety margin. Drugs
with a narrow therapeutic index require particularly careful dosing and monitoring.
Week 2 — Pharmacodynamics & Drug Interactions
6. A medication binds to a receptor and produces a maximal biological response. How is the
medication best classified?
A. Antagonist
B. Partial agonist
, C. Full agonist
D. Inverse transporter
Answer: C. Full agonist
Rationale: A full agonist binds to a receptor and activates it to produce the maximum response
associated with that receptor system.
7. What is the primary action of a competitive receptor antagonist?
A. Permanently destroys the receptor
B. Competes with an agonist for receptor binding
C. Increases agonist absorption
D. Converts an agonist into a metabolite
Answer: B. Competes with an agonist for receptor binding
Rationale: Competitive antagonists compete with agonists at the same receptor site and can
reduce the agonist's effect.
8. A patient takes two medications that both depress central nervous system activity. What
type of interaction is most concerning?
A. Additive or synergistic CNS depression
B. Increased renal filtration
C. Reduced protein binding only
D. Increased gastrointestinal motility
Answer: A. Additive or synergistic CNS depression
Rationale: Drugs with overlapping CNS-depressant effects can produce excessive sedation,
respiratory depression, impaired coordination, or loss of consciousness.
9. Which statement best describes pharmacodynamics?
A. What the body does to a medication
B. What a medication does to the body
C. How a medication is packaged
D. How a prescription is transmitted
Answer: B. What a medication does to the body
