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: Tetracyclines inhibit bacterial growth by blocking
A) DNA replication
B) Protein synthesis
C) Cell wall formation
D) Lipid metabolism
✅ Correct Answer: B
Explanation: Tetracyclines bind to the 30S ribosomal subunit to prevent protein synthesis.
Q: Dopamine agonists are prescribed in
A) Depression
B) Diabetes
C) Parkinson’s disease
D) Tuberculosis
✅ Correct Answer: C
Explanation: Dopamine agonists improve motor symptoms in Parkinson’s disease.
Q: Anaphylactic shock is treated with
A) Epinephrine
B) Lorazepam
C) Warfarin
D) Insulin
✅ Correct Answer: A
Explanation: Epinephrine rapidly reverses airway constriction and hypotension during anaphylaxis.
Q: Heparin acts immediately by inhibiting
A) Platelets
B) Thrombin
C) Erythropoietin
D) Lipase
✅ Correct Answer: B
Explanation: Heparin activates antithrombin III, which inactivates thrombin and factor Xa.
Q: ACE inhibitors lower blood pressure by reducing
A) Sodium levels
B) Angiotensin II
C) Calcium influx
D) Glucose reabsorption
✅ Correct Answer: B
Explanation: ACE inhibitors prevent the formation of angiotensin II, a potent vasoconstrictor.