NORTH AMERICAN PHARMACIST
LICENSURE EXAMINATION (NAPLEX). |
COMPREHENSIVE EXAM WITH CORRECT
VERIFIED ANSWERS
A patient receives 500 mg of a drug with 50% bioavailability.
How much reaches systemic circulation?
A. 50 mg
B. 100 mg
C. 250 mg
D. 500 mg
✅ Answer: C. 250 mg
Rationale: Bioavailability × dose = 0.5 × 500 mg.
2. Which drug class reduces mortality in heart failure with
reduced ejection fraction?
A. NSAIDs
B. ACE inhibitors
C. Calcium supplements
D. Antacids
,✅ Answer: B. ACE inhibitors
Rationale: Prevent ventricular remodeling and reduce
afterload.
3. Which antibiotic inhibits bacterial cell wall synthesis?
A. Ciprofloxacin
B. Amoxicillin
C. Azithromycin
D. Doxycycline
✅ Answer: B. Amoxicillin
Rationale: Beta-lactams inhibit peptidoglycan cross-linking.
4. A drug with zero-order kinetics:
A. Has constant half-life
B. Is eliminated proportionally
C. Is eliminated at constant rate
D. Follows first-order kinetics
✅ Answer: C. Is eliminated at constant rate
Rationale: Fixed amount eliminated per time unit.
5. Which medication requires INR monitoring?
,A. Heparin
B. Warfarin
C. Aspirin
D. Clopidogrel
✅ Answer: B. Warfarin
Rationale: Monitored using prothrombin time/INR.
6. First-line treatment for type 2 diabetes:
A. Insulin
B. Metformin
C. Glyburide
D. Pioglitazone
✅ Answer: B. Metformin
Rationale: Decreases hepatic glucose production.
7. A patient is allergic to penicillin. Which is safest
alternative?
A. Amoxicillin
B. Cephalexin
C. Azithromycin
D. Piperacillin
, ✅ Answer: C. Azithromycin
Rationale: Macrolide with no beta-lactam cross-reactivity.
8. Therapeutic range of digoxin:
A. 0.5–2 ng/mL
B. 5–10 ng/mL
C. 10–20 ng/mL
D. 20–40 ng/mL
✅ Answer: A. 0.5–2 ng/mL
Rationale: Narrow therapeutic index.
9. Which drug is contraindicated in pregnancy?
A. Labetalol
B. Methyldopa
C. ACE inhibitors
D. Insulin
✅ Answer: C. ACE inhibitors
Rationale: Causes fetal renal damage.
10. Vancomycin primarily treats:
LICENSURE EXAMINATION (NAPLEX). |
COMPREHENSIVE EXAM WITH CORRECT
VERIFIED ANSWERS
A patient receives 500 mg of a drug with 50% bioavailability.
How much reaches systemic circulation?
A. 50 mg
B. 100 mg
C. 250 mg
D. 500 mg
✅ Answer: C. 250 mg
Rationale: Bioavailability × dose = 0.5 × 500 mg.
2. Which drug class reduces mortality in heart failure with
reduced ejection fraction?
A. NSAIDs
B. ACE inhibitors
C. Calcium supplements
D. Antacids
,✅ Answer: B. ACE inhibitors
Rationale: Prevent ventricular remodeling and reduce
afterload.
3. Which antibiotic inhibits bacterial cell wall synthesis?
A. Ciprofloxacin
B. Amoxicillin
C. Azithromycin
D. Doxycycline
✅ Answer: B. Amoxicillin
Rationale: Beta-lactams inhibit peptidoglycan cross-linking.
4. A drug with zero-order kinetics:
A. Has constant half-life
B. Is eliminated proportionally
C. Is eliminated at constant rate
D. Follows first-order kinetics
✅ Answer: C. Is eliminated at constant rate
Rationale: Fixed amount eliminated per time unit.
5. Which medication requires INR monitoring?
,A. Heparin
B. Warfarin
C. Aspirin
D. Clopidogrel
✅ Answer: B. Warfarin
Rationale: Monitored using prothrombin time/INR.
6. First-line treatment for type 2 diabetes:
A. Insulin
B. Metformin
C. Glyburide
D. Pioglitazone
✅ Answer: B. Metformin
Rationale: Decreases hepatic glucose production.
7. A patient is allergic to penicillin. Which is safest
alternative?
A. Amoxicillin
B. Cephalexin
C. Azithromycin
D. Piperacillin
, ✅ Answer: C. Azithromycin
Rationale: Macrolide with no beta-lactam cross-reactivity.
8. Therapeutic range of digoxin:
A. 0.5–2 ng/mL
B. 5–10 ng/mL
C. 10–20 ng/mL
D. 20–40 ng/mL
✅ Answer: A. 0.5–2 ng/mL
Rationale: Narrow therapeutic index.
9. Which drug is contraindicated in pregnancy?
A. Labetalol
B. Methyldopa
C. ACE inhibitors
D. Insulin
✅ Answer: C. ACE inhibitors
Rationale: Causes fetal renal damage.
10. Vancomycin primarily treats:
