Pharmacology MCQs
Pharmacology MCQs test knowledge of drug actions, interactions, classifications, pharmacokinetics, pharmacodynamics, and toxicology. Ideal for MDCAT, USMLE, FCPS, and NTS preparation, these quizzes strengthen medical understanding and boost exam performance through targeted practice.
Q: Use of lidocaine in clinical settings
A) Antifungal activity
B) Antidepressant effect
C) Local anesthesia
D) Vasoconstriction
✅ Correct Answer: C
Explanation: Lidocaine blocks sodium channels, preventing nerve impulse transmission.
Q: Class of drugs to treat hyperlipidemia
A) Statins
B) Diuretics
C) ACE inhibitors
D) Beta-blockers
✅ Correct Answer: A
Explanation: Statins lower cholesterol by inhibiting HMG-CoA reductase, a key enzyme in cholesterol synthesis.
Q: Therapeutic application of isoniazid
A) Leprosy
B) Fungal infection
C) Malaria
D) Tuberculosis
✅ Correct Answer: D
Explanation: Isoniazid is a first-line antitubercular drug that inhibits mycolic acid synthesis in mycobacteria.
Q: Dihydropyridine calcium channel blocker used in hypertension
A) Diltiazem
B) Propranolol
C) Amlodipine
D) Verapamil
✅ Correct Answer: C
Explanation: Amlodipine causes vasodilation by inhibiting calcium influx in vascular smooth muscle.
Q: Common side effect of ACE inhibitors
A) Cough
B) Constipation
C) Sedation
D) Hypoglycemia
✅ Correct Answer: A
Explanation: ACE inhibitors increase bradykinin levels, often leading to a persistent dry cough.