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: Drug causing gingival hyperplasia
A) Metoprolol
B) Ciprofloxacin
C) Nifedipine
D) Omeprazole
✅ Correct Answer: C
Explanation: Calcium channel blockers like nifedipine can induce gingival overgrowth.
Q: Sulfonylureas stimulate insulin release from
A) Pancreatic beta cells
B) Liver
C) Muscle
D) Adipose tissue
✅ Correct Answer: A
Explanation: Sulfonylureas close potassium channels in beta cells, leading to insulin release.
Q: Drug of choice in malaria caused by P. vivax
A) Chloroquine
B) Quinine
C) Artemether
D) Doxycycline
✅ Correct Answer: A
Explanation: Chloroquine is effective against P. vivax in areas where resistance is not present.
Q: Mechanism of action of heparin
A) Inhibits platelet aggregation
B) Inhibits vitamin K
C) Blocks thrombin directly
D) Activates antithrombin III
✅ Correct Answer: D
Explanation: Heparin enhances the activity of antithrombin III, which inactivates clotting factors.
Q: Antibiotic class targeting bacterial ribosomes
A) Penicillins
B) Quinolones
C) Aminoglycosides
D) Cephalosporins
✅ Correct Answer: C
Explanation: Aminoglycosides bind to the 30S subunit of bacterial ribosomes, inhibiting protein synthesis.