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: Isoniazid acts against tuberculosis by inhibiting
A) Protein translation
B) Cell wall cross-linking
C) RNA polymerase
D) Mycolic acid synthesis
✅ Correct Answer: D
Explanation: Isoniazid disrupts mycobacterial cell wall synthesis by blocking mycolic acid production.
Q: Therapeutic use of warfarin is primarily aimed at preventing
A) Hypertension
B) Thromboembolism
C) Hyperglycemia
D) Asthma
✅ Correct Answer: B
Explanation: Warfarin inhibits vitamin K-dependent clotting factors to prevent blood clots.
Q: Furosemide induces diuresis by blocking
A) Na⁺-K⁺-2Cl⁻ symporter
B) Beta receptors
C) Sodium-potassium pump
D) Calcium channels
✅ Correct Answer: A
Explanation: Furosemide acts on the loop of Henle to increase salt and water excretion.
Q: Inhaled corticosteroids are first-line therapy in
A) Asthma
B) Diabetes
C) Anemia
D) Tuberculosis
✅ Correct Answer: A
Explanation: They reduce airway inflammation and prevent asthma exacerbations.
Q: MAO inhibitors elevate mood by preventing
A) Acetylcholine synthesis
B) Dopamine uptake
C) GABA release
D) Monoamine degradation
✅ Correct Answer: D
Explanation: MAOIs block the breakdown of neurotransmitters like serotonin and norepinephrine.