NURS 711 Pharmacotherapies Final
Exam A Comprehensive 100-
Question Practice Test with Verified
Answers, Detailed Rationales
Advanced Practice Nursing Students
(Graded A+)| Instant Downloaded
PDF
SECTION 1: Pharmacokinetics & Pharmacodynamics (Q1–
15)
1. A patient receives a drug intravenously. What is the bioavailability of this dose?
A. 25%
B. 50%
C. 75%
D. 100%
Answer: D
Rationale: IV administration bypasses absorption barriers entirely, so 100% of the
drug enters systemic circulation.
2. A drug with a half-life of 6 hours is administered at a constant rate. Approximately
how long until steady state is reached?
A. 6 hours
B. 12 hours
C. 24–30 hours
D. 48 hours
,Answer: C
Rationale: Steady state is typically reached after 4–5 half-lives. 4 × 6 = 24 hours; 5 ×
6 = 30 hours.
3. Which route of administration avoids first-pass metabolism?
A. Oral
B. Sublingual
C. Rectal (upper)
D. Enteric-coated oral
Answer: B
Rationale: Sublingual absorption drains into the systemic circulation via the venous
system, bypassing hepatic first-pass metabolism.
4. A patient with cirrhosis has reduced albumin. What effect would you expect on a
highly protein-bound drug?
A. Decreased free drug concentration
B. Increased free drug concentration
C. No change
D. Increased renal clearance only
Answer: B
Rationale: Less albumin means more unbound (free) drug, increasing pharmacologic
effect and toxicity risk.
5. Which parameter best reflects the safety margin of a drug?
A. Volume of distribution
B. Therapeutic index
C. Bioavailability
D. Clearance
Answer: B
Rationale: Therapeutic index = toxic dose / therapeutic dose. A narrow TI means
greater toxicity risk.
, 6. A drug is a potent CYP3A4 inhibitor. Which effect is expected when co-
administered with a CYP3A4 substrate?
A. Decreased substrate levels
B. Increased substrate levels
C. No change
D. Increased renal excretion of substrate
Answer: B
Rationale: Inhibiting metabolism reduces clearance of the substrate, raising its
plasma concentration and toxicity risk.
7. Rifampin is a potent enzyme inducer. What happens to oral contraceptive efficacy?
A. Increased efficacy
B. Decreased efficacy
C. No change
D. Only affects progestin
Answer: B
Rationale: Induction accelerates metabolism of contraceptive steroids, reducing
effectiveness; backup contraception is advised.
8. Which drug property most directly determines how quickly a drug reaches its site
of action?
A. Protein binding
B. Lipid solubility
C. Molecular weight
D. Half-life
Answer: B
Rationale: Lipid solubility facilitates crossing membranes to reach target tissues.
9. A loading dose is indicated when:
A. The drug has a long half-life and rapid effect is needed
B. The drug has a short half-life
Exam A Comprehensive 100-
Question Practice Test with Verified
Answers, Detailed Rationales
Advanced Practice Nursing Students
(Graded A+)| Instant Downloaded
SECTION 1: Pharmacokinetics & Pharmacodynamics (Q1–
15)
1. A patient receives a drug intravenously. What is the bioavailability of this dose?
A. 25%
B. 50%
C. 75%
D. 100%
Answer: D
Rationale: IV administration bypasses absorption barriers entirely, so 100% of the
drug enters systemic circulation.
2. A drug with a half-life of 6 hours is administered at a constant rate. Approximately
how long until steady state is reached?
A. 6 hours
B. 12 hours
C. 24–30 hours
D. 48 hours
,Answer: C
Rationale: Steady state is typically reached after 4–5 half-lives. 4 × 6 = 24 hours; 5 ×
6 = 30 hours.
3. Which route of administration avoids first-pass metabolism?
A. Oral
B. Sublingual
C. Rectal (upper)
D. Enteric-coated oral
Answer: B
Rationale: Sublingual absorption drains into the systemic circulation via the venous
system, bypassing hepatic first-pass metabolism.
4. A patient with cirrhosis has reduced albumin. What effect would you expect on a
highly protein-bound drug?
A. Decreased free drug concentration
B. Increased free drug concentration
C. No change
D. Increased renal clearance only
Answer: B
Rationale: Less albumin means more unbound (free) drug, increasing pharmacologic
effect and toxicity risk.
5. Which parameter best reflects the safety margin of a drug?
A. Volume of distribution
B. Therapeutic index
C. Bioavailability
D. Clearance
Answer: B
Rationale: Therapeutic index = toxic dose / therapeutic dose. A narrow TI means
greater toxicity risk.
, 6. A drug is a potent CYP3A4 inhibitor. Which effect is expected when co-
administered with a CYP3A4 substrate?
A. Decreased substrate levels
B. Increased substrate levels
C. No change
D. Increased renal excretion of substrate
Answer: B
Rationale: Inhibiting metabolism reduces clearance of the substrate, raising its
plasma concentration and toxicity risk.
7. Rifampin is a potent enzyme inducer. What happens to oral contraceptive efficacy?
A. Increased efficacy
B. Decreased efficacy
C. No change
D. Only affects progestin
Answer: B
Rationale: Induction accelerates metabolism of contraceptive steroids, reducing
effectiveness; backup contraception is advised.
8. Which drug property most directly determines how quickly a drug reaches its site
of action?
A. Protein binding
B. Lipid solubility
C. Molecular weight
D. Half-life
Answer: B
Rationale: Lipid solubility facilitates crossing membranes to reach target tissues.
9. A loading dose is indicated when:
A. The drug has a long half-life and rapid effect is needed
B. The drug has a short half-life
