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: Antacids neutralize stomach acid through
A) Receptor blockage
B) Hormone suppression
C) Chemical reaction
D) Enzyme inhibition
✅ Correct Answer: C
Explanation: They act directly on gastric acid to reduce acidity.
Q: Hydralazine lowers blood pressure by promoting
A) Diuresis
B) Vagal stimulation
C) Bronchoconstriction
D) Arterial vasodilation
✅ Correct Answer: D
Explanation: Hydralazine relaxes smooth muscle in arterioles.
Q: Dopamine agonists like bromocriptine are used to treat
A) Parkinson’s disease
B) Hyperthyroidism
C) Hypertension
D) Bacterial infections
✅ Correct Answer: A
Explanation: These drugs stimulate dopamine receptors to relieve Parkinsonian symptoms.
Q: Vancomycin administration requires careful monitoring due to risk of
A) Hypoglycemia
B) Constipation
C) Nephrotoxicity
D) Hair loss
✅ Correct Answer: C
Explanation: High doses may impair kidney function.
Q: Baclofen reduces spasticity by mimicking
A) Acetylcholine
B) GABA
C) Norepinephrine
D) Glutamate
✅ Correct Answer: B
Explanation: Baclofen activates GABA-B receptors, decreasing nerve transmission in the spinal cord.