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: Preferred route for insulin administration
A) Oral
B) Subcutaneous
C) Intravenous
D) Intramuscular
✅ Correct Answer: B
Explanation: Insulin is administered subcutaneously to allow for slow and steady absorption.
Q: Digoxin toxicity is commonly precipitated by
A) Hypernatremia
B) Hypokalemia
C) Hyponatremia
D) Hypercalcemia
✅ Correct Answer: B
Explanation: Low potassium levels increase digoxin binding to cardiac Na⁺/K⁺ ATPase, enhancing toxicity.
Q: Warfarin acts by inhibiting synthesis of
A) Platelets
B) Thrombin
C) Fibrin
D) Vitamin K-dependent clotting factors
✅ Correct Answer: D
Explanation: Warfarin interferes with synthesis of clotting factors II, VII, IX, and X in the liver.
Q: Dopamine precursor used in Parkinson's disease
A) Serotonin
B) GABA
C) Levodopa
D) Acetylcholine
✅ Correct Answer: C
Explanation: Levodopa crosses the blood-brain barrier and is converted to dopamine in the brain.
Q: Preferred inhalational anesthetic for rapid induction
A) Isoflurane
B) Sevoflurane
C) Desflurane
D) Halothane
✅ Correct Answer: C
Explanation: Desflurane has a low blood-gas partition coefficient, leading to fast onset and recovery.