NAPLEX (North American Pharmacist Licensure Examination)
TEST BANK TEST EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS PLUS RATIONALES 2026| ALREADY
GRADE A+.
1. A patient with hypertension is started on lisinopril. Which of the following is the most
important parameter to monitor initially?
A. Blood glucose
B. Serum potassium
C. Hemoglobin
D. Liver enzymes
Correct Answer: B
Rationale: ACE inhibitors like lisinopril can cause hyperkalemia; therefore, serum
potassium must be closely monitored. Blood glucose, hemoglobin, and liver enzymes
are less directly affected.
2. Which of the following antibiotics is most appropriate for treating a urinary tract
infection caused by E. coli?
A. Azithromycin
B. Nitrofurantoin
C. Vancomycin
D. Clindamycin
Correct Answer: B
Rationale: Nitrofurantoin is commonly used for uncomplicated UTIs caused by E.
coli. Azithromycin targets respiratory infections, while vancomycin and clindamycin
are more effective against Gram-positive organisms.
3. A patient taking warfarin should avoid which of the following due to increased
bleeding risk?
A. Vitamin C
B. Vitamin D
C. Vitamin K
D. Aspirin
Correct Answer: D
Rationale: Aspirin increases bleeding risk due to its antiplatelet effects. Vitamin K
reduces warfarin’s effect, while vitamins C and D have minimal impact.
4. Which of the following is a common adverse effect of metformin?
A. Hypoglycemia
B. Lactic acidosis
C. Weight gain
, D. Hyperkalemia
Correct Answer: B
Rationale: Metformin is associated with lactic acidosis, especially in renal
impairment. It does not typically cause hypoglycemia and often leads to weight
neutrality or loss.
5. A pharmacist is counseling a patient on albuterol inhaler use. What is the correct
instruction?
A. Use once daily regardless of symptoms
B. Shake well before use
C. Swallow after inhalation
D. Store in freezer
Correct Answer: B
Rationale: Albuterol inhalers should be shaken before use to ensure proper drug
delivery. It is used as needed, not swallowed, and stored at room temperature.
6. Which medication is contraindicated in pregnancy due to teratogenicity?
A. Acetaminophen
B. Lisinopril
C. Amoxicillin
D. Insulin
Correct Answer: B
Rationale: ACE inhibitors like lisinopril are teratogenic. Acetaminophen, amoxicillin,
and insulin are generally considered safe in pregnancy.
7. A patient presents with digoxin toxicity. Which electrolyte imbalance is most likely
present?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hyponatremia
Correct Answer: B
Rationale: Hypokalemia increases the risk of digoxin toxicity by enhancing its effects
on cardiac cells.
8. Which statin has the highest risk of drug-drug interactions due to CYP3A4
metabolism?
A. Pravastatin
B. Rosuvastatin
C. Simvastatin
D. Fluvastatin
Correct Answer: C
, Rationale: Simvastatin is extensively metabolized by CYP3A4, leading to significant
interaction potential.
9. A patient with asthma should avoid which medication?
A. Atenolol
B. Propranolol
C. Metoprolol
D. Amlodipine
Correct Answer: B
Rationale: Propranolol is a non-selective beta-blocker that can worsen
bronchospasm in asthma patients.
10. Which of the following is the antidote for acetaminophen overdose?
A. Naloxone
B. Flumazenil
C. N-acetylcysteine
D. Atropine
Correct Answer: C
Rationale: N-acetylcysteine replenishes glutathione and prevents liver damage in
acetaminophen toxicity.
11. Which diuretic is potassium-sparing?
A. Furosemide
B. Hydrochlorothiazide
C. Spironolactone
D. Bumetanide
Correct Answer: C
Rationale: Spironolactone is a potassium-sparing diuretic, unlike loop and thiazide
diuretics.
12. Which drug class is first-line for GERD treatment?
A. Antacids
B. Proton pump inhibitors
C. H2 blockers
D. Prokinetics
Correct Answer: B
Rationale: PPIs are the most effective for acid suppression and are first-line therapy
for GERD.
, 13. A patient on insulin develops hypoglycemia. What is the best immediate treatment?
A. Glucagon IM
B. IV saline
C. Oral glucose
D. Insulin adjustment
Correct Answer: C
Rationale: Conscious patients should receive oral glucose immediately. Glucagon is
used if unconscious.
14. Which antibiotic is associated with tendon rupture?
A. Penicillin
B. Ciprofloxacin
C. Doxycycline
D. Ceftriaxone
Correct Answer: B
Rationale: Fluoroquinolones like ciprofloxacin are associated with tendon rupture
risk.
15. Which lab value is used to monitor long-term glucose control?
A. Fasting glucose
B. HbA1c
C. Random glucose
D. Insulin levels
Correct Answer: B
Rationale: HbA1c reflects average glucose levels over 2–3 months.
16. A patient taking levothyroxine should take it:
A. With food
B. At bedtime
C. On an empty stomach
D. With calcium
Correct Answer: C
Rationale: Levothyroxine absorption is best on an empty stomach; food and calcium
reduce absorption.
17. Which medication is used for opioid overdose?
A. Methadone
B. Naloxone
C. Buprenorphine
D. Naltrexone
Correct Answer: B
Rationale: Naloxone is a rapid-acting opioid antagonist used in overdose.
TEST BANK TEST EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS PLUS RATIONALES 2026| ALREADY
GRADE A+.
1. A patient with hypertension is started on lisinopril. Which of the following is the most
important parameter to monitor initially?
A. Blood glucose
B. Serum potassium
C. Hemoglobin
D. Liver enzymes
Correct Answer: B
Rationale: ACE inhibitors like lisinopril can cause hyperkalemia; therefore, serum
potassium must be closely monitored. Blood glucose, hemoglobin, and liver enzymes
are less directly affected.
2. Which of the following antibiotics is most appropriate for treating a urinary tract
infection caused by E. coli?
A. Azithromycin
B. Nitrofurantoin
C. Vancomycin
D. Clindamycin
Correct Answer: B
Rationale: Nitrofurantoin is commonly used for uncomplicated UTIs caused by E.
coli. Azithromycin targets respiratory infections, while vancomycin and clindamycin
are more effective against Gram-positive organisms.
3. A patient taking warfarin should avoid which of the following due to increased
bleeding risk?
A. Vitamin C
B. Vitamin D
C. Vitamin K
D. Aspirin
Correct Answer: D
Rationale: Aspirin increases bleeding risk due to its antiplatelet effects. Vitamin K
reduces warfarin’s effect, while vitamins C and D have minimal impact.
4. Which of the following is a common adverse effect of metformin?
A. Hypoglycemia
B. Lactic acidosis
C. Weight gain
, D. Hyperkalemia
Correct Answer: B
Rationale: Metformin is associated with lactic acidosis, especially in renal
impairment. It does not typically cause hypoglycemia and often leads to weight
neutrality or loss.
5. A pharmacist is counseling a patient on albuterol inhaler use. What is the correct
instruction?
A. Use once daily regardless of symptoms
B. Shake well before use
C. Swallow after inhalation
D. Store in freezer
Correct Answer: B
Rationale: Albuterol inhalers should be shaken before use to ensure proper drug
delivery. It is used as needed, not swallowed, and stored at room temperature.
6. Which medication is contraindicated in pregnancy due to teratogenicity?
A. Acetaminophen
B. Lisinopril
C. Amoxicillin
D. Insulin
Correct Answer: B
Rationale: ACE inhibitors like lisinopril are teratogenic. Acetaminophen, amoxicillin,
and insulin are generally considered safe in pregnancy.
7. A patient presents with digoxin toxicity. Which electrolyte imbalance is most likely
present?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hyponatremia
Correct Answer: B
Rationale: Hypokalemia increases the risk of digoxin toxicity by enhancing its effects
on cardiac cells.
8. Which statin has the highest risk of drug-drug interactions due to CYP3A4
metabolism?
A. Pravastatin
B. Rosuvastatin
C. Simvastatin
D. Fluvastatin
Correct Answer: C
, Rationale: Simvastatin is extensively metabolized by CYP3A4, leading to significant
interaction potential.
9. A patient with asthma should avoid which medication?
A. Atenolol
B. Propranolol
C. Metoprolol
D. Amlodipine
Correct Answer: B
Rationale: Propranolol is a non-selective beta-blocker that can worsen
bronchospasm in asthma patients.
10. Which of the following is the antidote for acetaminophen overdose?
A. Naloxone
B. Flumazenil
C. N-acetylcysteine
D. Atropine
Correct Answer: C
Rationale: N-acetylcysteine replenishes glutathione and prevents liver damage in
acetaminophen toxicity.
11. Which diuretic is potassium-sparing?
A. Furosemide
B. Hydrochlorothiazide
C. Spironolactone
D. Bumetanide
Correct Answer: C
Rationale: Spironolactone is a potassium-sparing diuretic, unlike loop and thiazide
diuretics.
12. Which drug class is first-line for GERD treatment?
A. Antacids
B. Proton pump inhibitors
C. H2 blockers
D. Prokinetics
Correct Answer: B
Rationale: PPIs are the most effective for acid suppression and are first-line therapy
for GERD.
, 13. A patient on insulin develops hypoglycemia. What is the best immediate treatment?
A. Glucagon IM
B. IV saline
C. Oral glucose
D. Insulin adjustment
Correct Answer: C
Rationale: Conscious patients should receive oral glucose immediately. Glucagon is
used if unconscious.
14. Which antibiotic is associated with tendon rupture?
A. Penicillin
B. Ciprofloxacin
C. Doxycycline
D. Ceftriaxone
Correct Answer: B
Rationale: Fluoroquinolones like ciprofloxacin are associated with tendon rupture
risk.
15. Which lab value is used to monitor long-term glucose control?
A. Fasting glucose
B. HbA1c
C. Random glucose
D. Insulin levels
Correct Answer: B
Rationale: HbA1c reflects average glucose levels over 2–3 months.
16. A patient taking levothyroxine should take it:
A. With food
B. At bedtime
C. On an empty stomach
D. With calcium
Correct Answer: C
Rationale: Levothyroxine absorption is best on an empty stomach; food and calcium
reduce absorption.
17. Which medication is used for opioid overdose?
A. Methadone
B. Naloxone
C. Buprenorphine
D. Naltrexone
Correct Answer: B
Rationale: Naloxone is a rapid-acting opioid antagonist used in overdose.
