1
HESI Pharmacology Specialty Exam
(2025/2026) – Verified Questions and
Correct Rationales | 100% Exam
Success Assured
Medication Classes (15 Questions)
1. Which medication class is used to manage hypertension by blocking angiotensin II
receptors?
A. Beta-blockers
B. Angiotensin-converting enzyme (ACE) inhibitors
C. Angiotensin II receptor blockers (ARBs)
D. Calcium channel blockers
Correct Answer: C. Angiotensin II receptor blockers (ARBs)
Rationale: ARBs, such as losartan, block angiotensin II receptors, reducing
vasoconstriction and lowering blood pressure, distinct from ACE inhibitors, which block
angiotensin I conversion.
2. What is the primary action of loop diuretics like furosemide?
A. Increase potassium reabsorption
B. Inhibit sodium and chloride reabsorption in the loop of Henle
C. Block calcium channels
D. Promote vasoconstriction
Correct Answer: B. Inhibit sodium and chloride reabsorption in the loop of Henle
Rationale: Loop diuretics inhibit sodium and chloride reabsorption in the loop of Henle,
increasing urine output and reducing fluid overload in conditions like heart failure.
3. Which medication class is first-line for managing type 2 diabetes?
A. Sulfonylureas
B. Biguanides
C. Thiazolidinediones
D. DPP-4 inhibitors
Correct Answer: B. Biguanides
Rationale: Biguanides, such as metformin, are first-line for type 2 diabetes as they
decrease hepatic glucose production and improve insulin sensitivity, per ADA guidelines.
4. A patient is prescribed a selective serotonin reuptake inhibitor (SSRI). What
condition is this likely treating?
A. Hypertension
B. Depression
C. Seizures
D. Arrhythmias
Correct Answer: B. Depression
, 2
Rationale: SSRIs, like sertraline, increase serotonin levels in the brain, making them
effective for treating depression and anxiety disorders.
5. What is the mechanism of action of beta-blockers like metoprolol?
A. Increase heart rate
B. Block beta-adrenergic receptors to reduce heart rate and blood pressure
C. Inhibit sodium reabsorption
D. Enhance calcium influx
Correct Answer: B. Block beta-adrenergic receptors to reduce heart rate and blood
pressure
Rationale: Beta-blockers reduce cardiac output and blood pressure by blocking beta-
adrenergic receptors, used in hypertension and heart failure.
6. Which class of medications is used to treat bronchospasm in asthma?
A. Antihistamines
B. Beta-2 agonists
C. Anticholinergics
D. Corticosteroids
Correct Answer: B. Beta-2 agonists
Rationale: Beta-2 agonists, such as albuterol, relax bronchial smooth muscles to relieve
bronchospasm in asthma, acting as bronchodilators.
7. What is the primary use of HMG-CoA reductase inhibitors?
A. Lower blood glucose
B. Reduce cholesterol levels
C. Treat bacterial infections
D. Manage seizures
Correct Answer: B. Reduce cholesterol levels
Rationale: HMG-CoA reductase inhibitors (statins), like atorvastatin, lower LDL
cholesterol by inhibiting cholesterol synthesis in the liver.
8. Which medication class is used to prevent blood clots in atrial fibrillation?
A. Anticoagulants
B. Antiplatelets
C. Thrombolytics
D. Diuretics
Correct Answer: A. Anticoagulants
Rationale: Anticoagulants, such as warfarin or apixaban, prevent clot formation in
conditions like atrial fibrillation, reducing stroke risk.
9. What is the action of proton pump inhibitors (PPIs) like omeprazole?
A. Increase gastric acid production
B. Inhibit gastric acid secretion
C. Neutralize stomach acid
D. Enhance gastric motility
Correct Answer: B. Inhibit gastric acid secretion
Rationale: PPIs block the proton pump in parietal cells, reducing acid secretion and
treating conditions like GERD and ulcers.
10. Which class of medications is used to manage seizures by enhancing GABA activity?
A. Benzodiazepines
B. Beta-blockers
HESI Pharmacology Specialty Exam
(2025/2026) – Verified Questions and
Correct Rationales | 100% Exam
Success Assured
Medication Classes (15 Questions)
1. Which medication class is used to manage hypertension by blocking angiotensin II
receptors?
A. Beta-blockers
B. Angiotensin-converting enzyme (ACE) inhibitors
C. Angiotensin II receptor blockers (ARBs)
D. Calcium channel blockers
Correct Answer: C. Angiotensin II receptor blockers (ARBs)
Rationale: ARBs, such as losartan, block angiotensin II receptors, reducing
vasoconstriction and lowering blood pressure, distinct from ACE inhibitors, which block
angiotensin I conversion.
2. What is the primary action of loop diuretics like furosemide?
A. Increase potassium reabsorption
B. Inhibit sodium and chloride reabsorption in the loop of Henle
C. Block calcium channels
D. Promote vasoconstriction
Correct Answer: B. Inhibit sodium and chloride reabsorption in the loop of Henle
Rationale: Loop diuretics inhibit sodium and chloride reabsorption in the loop of Henle,
increasing urine output and reducing fluid overload in conditions like heart failure.
3. Which medication class is first-line for managing type 2 diabetes?
A. Sulfonylureas
B. Biguanides
C. Thiazolidinediones
D. DPP-4 inhibitors
Correct Answer: B. Biguanides
Rationale: Biguanides, such as metformin, are first-line for type 2 diabetes as they
decrease hepatic glucose production and improve insulin sensitivity, per ADA guidelines.
4. A patient is prescribed a selective serotonin reuptake inhibitor (SSRI). What
condition is this likely treating?
A. Hypertension
B. Depression
C. Seizures
D. Arrhythmias
Correct Answer: B. Depression
, 2
Rationale: SSRIs, like sertraline, increase serotonin levels in the brain, making them
effective for treating depression and anxiety disorders.
5. What is the mechanism of action of beta-blockers like metoprolol?
A. Increase heart rate
B. Block beta-adrenergic receptors to reduce heart rate and blood pressure
C. Inhibit sodium reabsorption
D. Enhance calcium influx
Correct Answer: B. Block beta-adrenergic receptors to reduce heart rate and blood
pressure
Rationale: Beta-blockers reduce cardiac output and blood pressure by blocking beta-
adrenergic receptors, used in hypertension and heart failure.
6. Which class of medications is used to treat bronchospasm in asthma?
A. Antihistamines
B. Beta-2 agonists
C. Anticholinergics
D. Corticosteroids
Correct Answer: B. Beta-2 agonists
Rationale: Beta-2 agonists, such as albuterol, relax bronchial smooth muscles to relieve
bronchospasm in asthma, acting as bronchodilators.
7. What is the primary use of HMG-CoA reductase inhibitors?
A. Lower blood glucose
B. Reduce cholesterol levels
C. Treat bacterial infections
D. Manage seizures
Correct Answer: B. Reduce cholesterol levels
Rationale: HMG-CoA reductase inhibitors (statins), like atorvastatin, lower LDL
cholesterol by inhibiting cholesterol synthesis in the liver.
8. Which medication class is used to prevent blood clots in atrial fibrillation?
A. Anticoagulants
B. Antiplatelets
C. Thrombolytics
D. Diuretics
Correct Answer: A. Anticoagulants
Rationale: Anticoagulants, such as warfarin or apixaban, prevent clot formation in
conditions like atrial fibrillation, reducing stroke risk.
9. What is the action of proton pump inhibitors (PPIs) like omeprazole?
A. Increase gastric acid production
B. Inhibit gastric acid secretion
C. Neutralize stomach acid
D. Enhance gastric motility
Correct Answer: B. Inhibit gastric acid secretion
Rationale: PPIs block the proton pump in parietal cells, reducing acid secretion and
treating conditions like GERD and ulcers.
10. Which class of medications is used to manage seizures by enhancing GABA activity?
A. Benzodiazepines
B. Beta-blockers
