NSG 5240 Advanced Pharmacology:
Comprehensive Practice Exam Bank
Questions with Answers & Rationales
Section 1: Pharmacokinetics & Pharmacodynamics (Questions
1–25)
1. A drug with a high volume of distribution (Vd) primarily
indicates:
A. The drug is highly protein-bound
B. The drug is confined to the vascular space
C. The drug extensively distributes into tissues
D. The drug has a short half-life
Correct Answer: C
Rationale: A high Vd suggests the drug has left the plasma and
entered tissues, often due to lipophilicity or tissue binding. High
protein binding usually decreases Vd by keeping the drug in the
vascular space.
2. A patient with hepatic cirrhosis is prescribed a prodrug. The
nurse practitioner anticipates:
, A. Enhanced therapeutic effect
B. Reduced conversion to active metabolite
C. Increased first-pass metabolism
D. No change in drug activity
Correct Answer: B
Rationale: Cirrhosis impairs liver function, reducing the
conversion of prodrugs to their active form, potentially leading to
therapeutic failure.
3. Which cytochrome P450 enzyme is most commonly
involved in drug-drug interactions?
A. CYP1A2
B. CYP2D6
C. CYP3A4
D. CYP2C9
Correct Answer: C
Rationale: CYP3A4 metabolizes over 50% of all drugs and is
inhibited/induced by many agents (e.g., grapefruit juice, rifampin,
ketoconazole).
4. A drug's half-life is 12 hours. How many hours until steady
state is reached?
A. 24 hours
, B. 36 hours
C. 48 hours
D. 60 hours
Correct Answer: D
Rationale: Steady state is achieved after approximately 4–5 half-
lives. 5 × 12 hours = 60 hours.
5. The primary route of drug excretion for water-soluble
drugs is:
A. Bile
B. Feces
C. Kidney
D. Sweat
Correct Answer: C
Rationale: Kidneys filter water-soluble drugs and metabolites into
urine; bile is secondary for larger molecules.
6. Phase II metabolism typically involves:
A. Oxidation via CYP450
B. Reduction reactions
C. Conjugation (e.g., glucuronidation)
D. Hydrolysis
, Correct Answer: C
Rationale: Phase II reactions add polar groups (glucuronide,
sulfate, glutathione) to increase water solubility and excretion.
7. Grapefruit juice increases levels of certain drugs by:
A. Inducing CYP3A4
B. Inhibiting intestinal CYP3A4
C. Increasing gastric emptying
D. Enhancing renal reabsorption
Correct Answer: B
Rationale: Grapefruit juice inhibits intestinal CYP3A4, reducing
first-pass metabolism and increasing systemic drug levels.
8. The term "bioavailability" refers to:
A. The amount of drug that reaches systemic circulation
unchanged
B. The rate at which a drug is metabolized by the liver
C. The volume of distribution of a drug
D. The time it takes for a drug to reach peak concentration
Correct Answer: A
Rationale: Bioavailability (F) is the fraction of an administered
dose that reaches systemic circulation unchanged. IV drugs have
Comprehensive Practice Exam Bank
Questions with Answers & Rationales
Section 1: Pharmacokinetics & Pharmacodynamics (Questions
1–25)
1. A drug with a high volume of distribution (Vd) primarily
indicates:
A. The drug is highly protein-bound
B. The drug is confined to the vascular space
C. The drug extensively distributes into tissues
D. The drug has a short half-life
Correct Answer: C
Rationale: A high Vd suggests the drug has left the plasma and
entered tissues, often due to lipophilicity or tissue binding. High
protein binding usually decreases Vd by keeping the drug in the
vascular space.
2. A patient with hepatic cirrhosis is prescribed a prodrug. The
nurse practitioner anticipates:
, A. Enhanced therapeutic effect
B. Reduced conversion to active metabolite
C. Increased first-pass metabolism
D. No change in drug activity
Correct Answer: B
Rationale: Cirrhosis impairs liver function, reducing the
conversion of prodrugs to their active form, potentially leading to
therapeutic failure.
3. Which cytochrome P450 enzyme is most commonly
involved in drug-drug interactions?
A. CYP1A2
B. CYP2D6
C. CYP3A4
D. CYP2C9
Correct Answer: C
Rationale: CYP3A4 metabolizes over 50% of all drugs and is
inhibited/induced by many agents (e.g., grapefruit juice, rifampin,
ketoconazole).
4. A drug's half-life is 12 hours. How many hours until steady
state is reached?
A. 24 hours
, B. 36 hours
C. 48 hours
D. 60 hours
Correct Answer: D
Rationale: Steady state is achieved after approximately 4–5 half-
lives. 5 × 12 hours = 60 hours.
5. The primary route of drug excretion for water-soluble
drugs is:
A. Bile
B. Feces
C. Kidney
D. Sweat
Correct Answer: C
Rationale: Kidneys filter water-soluble drugs and metabolites into
urine; bile is secondary for larger molecules.
6. Phase II metabolism typically involves:
A. Oxidation via CYP450
B. Reduction reactions
C. Conjugation (e.g., glucuronidation)
D. Hydrolysis
, Correct Answer: C
Rationale: Phase II reactions add polar groups (glucuronide,
sulfate, glutathione) to increase water solubility and excretion.
7. Grapefruit juice increases levels of certain drugs by:
A. Inducing CYP3A4
B. Inhibiting intestinal CYP3A4
C. Increasing gastric emptying
D. Enhancing renal reabsorption
Correct Answer: B
Rationale: Grapefruit juice inhibits intestinal CYP3A4, reducing
first-pass metabolism and increasing systemic drug levels.
8. The term "bioavailability" refers to:
A. The amount of drug that reaches systemic circulation
unchanged
B. The rate at which a drug is metabolized by the liver
C. The volume of distribution of a drug
D. The time it takes for a drug to reach peak concentration
Correct Answer: A
Rationale: Bioavailability (F) is the fraction of an administered
dose that reaches systemic circulation unchanged. IV drugs have
