MEDSCI303 | MEDSCI303 Pharmacy Exam 1
Version 2 | Questions with Correct Answers and
Expert Explanation for Each Question | Rajiv
Gandhi University of Health Sciences
1. What is the primary mechanism of action for ACE inhibitors like Lisinopril?
A. Increases the excretion of sodium and water in the distal tubule
B. Blocks beta-1 adrenergic receptors in the heart
C. Inhibits the conversion of Angiotensin I to Angiotensin II
D. Directly relaxes vascular smooth muscle
Correct Answer: C
Expert Explanation: ACE inhibitors target the angiotensin-converting enzyme to
prevent the production of Angiotensin II. This inhibition leads to systemic
vasodilation and a reduction in blood pressure. The drug also decreases aldosterone
secretion, which helps reduce fluid volume. It is a cornerstone therapy for patients
with hypertension and congestive heart failure. Clinicians must monitor for a
persistent dry cough as a common side effect.
2. Which of the following is a significant side effect of long-term NSAID therapy?
A. Hypoglycemia
B. Tachycardia
,C. Gastrointestinal ulceration and bleeding
D. Hepatotoxicity at therapeutic doses
Correct Answer: C
Expert Explanation: Nonsteroidal anti-inflammatory drugs inhibit prostaglandin
synthesis by blocking COX enzymes. Prostaglandins play a vital role in protecting
the gastric mucosa from acid. Long-term use of these agents significantly increases
the risk of peptic ulcers. Patients are often advised to take these medications with
food to mitigate irritation. Chronic use also requires monitoring of renal function
and blood pressure.
3. Beta-blockers are primarily contraindicated in patients with which of the following
conditions?
A. Hypertension
B. Glaucoma
C. Hyperthyroidism
D. Asthma or COPD
Correct Answer: D
Expert Explanation: Non-selective beta-blockers can cause bronchoconstriction by
blocking beta-2 receptors in the lungs. This effect can be life-threatening for patients
,with pre-existing airway diseases like asthma. Selective beta-1 blockers are
preferred if a beta-blocker is absolutely necessary in these patients. Healthcare
providers must evaluate the respiratory history before initiating therapy. Sudden
withdrawal of these drugs should also be avoided to prevent rebound tachycardia.
4. What is the therapeutic indication for the drug Metformin?
A. Type 1 Diabetes Mellitus
B. Gestational Diabetes only
C. Type 2 Diabetes Mellitus
D. Diabetes Insipidus
Correct Answer: C
Expert Explanation: Metformin is the first-line pharmacological treatment for Type
2 Diabetes Mellitus. It works by decreasing hepatic glucose production and
improving insulin sensitivity. Unlike sulfonylureas, it does not typically cause
hypoglycemia when used alone. It is often favored because it supports weight
neutrality or modest weight loss. Patients must be screened for renal impairment
before starting this medication.
5. Which drug is considered a HMG-CoA reductase inhibitor?
A. Atorvastatin
B. Furosemide
, C. Warfarin
D. Amiodarone
Correct Answer: A
Expert Explanation: Atorvastatin belongs to the statin class, which lowers LDL
cholesterol levels effectively. It inhibits the enzyme HMG-CoA reductase, which is
the rate-limiting step in cholesterol synthesis. This reduction in cholesterol helps
prevent atherosclerotic cardiovascular disease. Statins are typically administered in
the evening when cholesterol synthesis is highest. Monitoring for muscle pain or
weakness is crucial to detect rare rhabdomyolysis.
6. What is the specific antidote for a Heparin overdose?
A. Vitamin K
B. Protamine sulfate
C. Flumazenil
D. Naloxone
Correct Answer: B
Expert Explanation: Protamine sulfate is a highly alkaline protein that neutralizes
the acidic heparin molecule. It forms a stable salt complex that lacks anticoagulant
activity. Dosage is calculated based on the amount of heparin administered recently.
Version 2 | Questions with Correct Answers and
Expert Explanation for Each Question | Rajiv
Gandhi University of Health Sciences
1. What is the primary mechanism of action for ACE inhibitors like Lisinopril?
A. Increases the excretion of sodium and water in the distal tubule
B. Blocks beta-1 adrenergic receptors in the heart
C. Inhibits the conversion of Angiotensin I to Angiotensin II
D. Directly relaxes vascular smooth muscle
Correct Answer: C
Expert Explanation: ACE inhibitors target the angiotensin-converting enzyme to
prevent the production of Angiotensin II. This inhibition leads to systemic
vasodilation and a reduction in blood pressure. The drug also decreases aldosterone
secretion, which helps reduce fluid volume. It is a cornerstone therapy for patients
with hypertension and congestive heart failure. Clinicians must monitor for a
persistent dry cough as a common side effect.
2. Which of the following is a significant side effect of long-term NSAID therapy?
A. Hypoglycemia
B. Tachycardia
,C. Gastrointestinal ulceration and bleeding
D. Hepatotoxicity at therapeutic doses
Correct Answer: C
Expert Explanation: Nonsteroidal anti-inflammatory drugs inhibit prostaglandin
synthesis by blocking COX enzymes. Prostaglandins play a vital role in protecting
the gastric mucosa from acid. Long-term use of these agents significantly increases
the risk of peptic ulcers. Patients are often advised to take these medications with
food to mitigate irritation. Chronic use also requires monitoring of renal function
and blood pressure.
3. Beta-blockers are primarily contraindicated in patients with which of the following
conditions?
A. Hypertension
B. Glaucoma
C. Hyperthyroidism
D. Asthma or COPD
Correct Answer: D
Expert Explanation: Non-selective beta-blockers can cause bronchoconstriction by
blocking beta-2 receptors in the lungs. This effect can be life-threatening for patients
,with pre-existing airway diseases like asthma. Selective beta-1 blockers are
preferred if a beta-blocker is absolutely necessary in these patients. Healthcare
providers must evaluate the respiratory history before initiating therapy. Sudden
withdrawal of these drugs should also be avoided to prevent rebound tachycardia.
4. What is the therapeutic indication for the drug Metformin?
A. Type 1 Diabetes Mellitus
B. Gestational Diabetes only
C. Type 2 Diabetes Mellitus
D. Diabetes Insipidus
Correct Answer: C
Expert Explanation: Metformin is the first-line pharmacological treatment for Type
2 Diabetes Mellitus. It works by decreasing hepatic glucose production and
improving insulin sensitivity. Unlike sulfonylureas, it does not typically cause
hypoglycemia when used alone. It is often favored because it supports weight
neutrality or modest weight loss. Patients must be screened for renal impairment
before starting this medication.
5. Which drug is considered a HMG-CoA reductase inhibitor?
A. Atorvastatin
B. Furosemide
, C. Warfarin
D. Amiodarone
Correct Answer: A
Expert Explanation: Atorvastatin belongs to the statin class, which lowers LDL
cholesterol levels effectively. It inhibits the enzyme HMG-CoA reductase, which is
the rate-limiting step in cholesterol synthesis. This reduction in cholesterol helps
prevent atherosclerotic cardiovascular disease. Statins are typically administered in
the evening when cholesterol synthesis is highest. Monitoring for muscle pain or
weakness is crucial to detect rare rhabdomyolysis.
6. What is the specific antidote for a Heparin overdose?
A. Vitamin K
B. Protamine sulfate
C. Flumazenil
D. Naloxone
Correct Answer: B
Expert Explanation: Protamine sulfate is a highly alkaline protein that neutralizes
the acidic heparin molecule. It forms a stable salt complex that lacks anticoagulant
activity. Dosage is calculated based on the amount of heparin administered recently.
