NR 565 Advanced Pharmacology – Final Exam Questions and Answers | 2025/ 2026
1. A drug exhibits a high first-pass hepatic effect. Which route of administration would
MOST significantly increase its bioavailability?
A. Oral
B. Sublingual
C. Rectal
D. Intramuscular
✅ Correct Answer: B
Rationale:
Sublingual administration bypasses first-pass hepatic metabolism, significantly increasing
bioavailability for drugs extensively metabolized by the liver.
2. Which pharmacokinetic parameter BEST reflects the time required for a drug to reach
steady state?
A. Peak concentration
B. Bioavailability
C. Half-life
D. Volume of distribution
✅ Correct Answer: C
Rationale:
Steady state is typically achieved after 4–5 half-lives of a drug.
,3. A medication is 95% protein-bound. Which condition would MOST increase free drug
concentration?
A. Obesity
B. Hypoalbuminemia
C. Increased renal perfusion
D. Delayed gastric emptying
✅ Correct Answer: B
Rationale:
Low albumin reduces protein binding, increasing the free (active) fraction and toxicity risk.
4. Which patient is at HIGHEST risk for adverse drug reactions due to altered
pharmacokinetics?
A. Healthy adult
B. Pediatric patient
C. Pregnant patient
D. Older adult with renal impairment
✅ Correct Answer: D
Rationale:
Age-related renal decline alters drug clearance, increasing toxicity risk.
5. A drug with a narrow therapeutic index requires monitoring of:
A. Trough levels only
B. Peak levels only
,C. Serum drug concentrations
D. Liver enzymes only
✅ Correct Answer: C
Rationale:
Small differences between therapeutic and toxic levels require serum concentration monitoring.
6. Which receptor interaction produces a maximal response?
A. Partial agonist
B. Competitive antagonist
C. Full agonist
D. Inverse agonist
✅ Correct Answer: C
Rationale:
A full agonist activates receptors to produce the maximum biological response.
7. Administering a partial agonist with a full agonist will:
A. Increase drug effect
B. Have no impact
C. Reduce the overall effect
D. Eliminate toxicity
✅ Correct Answer: C
Rationale:
Partial agonists compete for receptors but produce less activity, reducing overall effect.
, 8. Which drug interaction increases toxicity by inhibiting metabolism?
A. Induction of CYP450
B. Competitive receptor antagonism
C. CYP450 enzyme inhibition
D. Increased renal clearance
✅ Correct Answer: C
Rationale:
Enzyme inhibition slows metabolism, increasing serum drug levels.
9. A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole. What is the
primary concern?
A. Reduced INR
B. Increased bleeding risk
C. Reduced warfarin absorption
D. Thromboembolism
✅ Correct Answer: B
Rationale:
TMP-SMX inhibits warfarin metabolism, increasing INR and bleeding risk.
10. Which pharmacodynamic concept explains diminishing response after repeated dosing?
A. Synergism
B. Tolerance
1. A drug exhibits a high first-pass hepatic effect. Which route of administration would
MOST significantly increase its bioavailability?
A. Oral
B. Sublingual
C. Rectal
D. Intramuscular
✅ Correct Answer: B
Rationale:
Sublingual administration bypasses first-pass hepatic metabolism, significantly increasing
bioavailability for drugs extensively metabolized by the liver.
2. Which pharmacokinetic parameter BEST reflects the time required for a drug to reach
steady state?
A. Peak concentration
B. Bioavailability
C. Half-life
D. Volume of distribution
✅ Correct Answer: C
Rationale:
Steady state is typically achieved after 4–5 half-lives of a drug.
,3. A medication is 95% protein-bound. Which condition would MOST increase free drug
concentration?
A. Obesity
B. Hypoalbuminemia
C. Increased renal perfusion
D. Delayed gastric emptying
✅ Correct Answer: B
Rationale:
Low albumin reduces protein binding, increasing the free (active) fraction and toxicity risk.
4. Which patient is at HIGHEST risk for adverse drug reactions due to altered
pharmacokinetics?
A. Healthy adult
B. Pediatric patient
C. Pregnant patient
D. Older adult with renal impairment
✅ Correct Answer: D
Rationale:
Age-related renal decline alters drug clearance, increasing toxicity risk.
5. A drug with a narrow therapeutic index requires monitoring of:
A. Trough levels only
B. Peak levels only
,C. Serum drug concentrations
D. Liver enzymes only
✅ Correct Answer: C
Rationale:
Small differences between therapeutic and toxic levels require serum concentration monitoring.
6. Which receptor interaction produces a maximal response?
A. Partial agonist
B. Competitive antagonist
C. Full agonist
D. Inverse agonist
✅ Correct Answer: C
Rationale:
A full agonist activates receptors to produce the maximum biological response.
7. Administering a partial agonist with a full agonist will:
A. Increase drug effect
B. Have no impact
C. Reduce the overall effect
D. Eliminate toxicity
✅ Correct Answer: C
Rationale:
Partial agonists compete for receptors but produce less activity, reducing overall effect.
, 8. Which drug interaction increases toxicity by inhibiting metabolism?
A. Induction of CYP450
B. Competitive receptor antagonism
C. CYP450 enzyme inhibition
D. Increased renal clearance
✅ Correct Answer: C
Rationale:
Enzyme inhibition slows metabolism, increasing serum drug levels.
9. A patient taking warfarin is prescribed trimethoprim-sulfamethoxazole. What is the
primary concern?
A. Reduced INR
B. Increased bleeding risk
C. Reduced warfarin absorption
D. Thromboembolism
✅ Correct Answer: B
Rationale:
TMP-SMX inhibits warfarin metabolism, increasing INR and bleeding risk.
10. Which pharmacodynamic concept explains diminishing response after repeated dosing?
A. Synergism
B. Tolerance
