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: Adverse effect commonly associated with aminoglycosides
A) Ototoxicity
B) Hepatotoxicity
C) Hyperkalemia
D) Bone marrow suppression
✅ Correct Answer: A
Explanation: Aminoglycosides can cause irreversible damage to the auditory and vestibular systems.
Q: Primary action of loop diuretics
A) Aldosterone receptor blockade
B) Inhibition of Na⁺-K⁺-2Cl⁻ transporter in thick ascending limb
C) Sodium reabsorption in distal tubule
D) Inhibition of carbonic anhydrase
✅ Correct Answer: B
Explanation: Loop diuretics act on the thick ascending limb to block sodium and chloride reabsorption.
Q: Pharmacological classification of omeprazole
A) Antacid
B) H2 blocker
C) Prokinetic agent
D) Proton pump inhibitor
✅ Correct Answer: D
Explanation: Omeprazole irreversibly inhibits the H⁺/K⁺ ATPase pump in gastric parietal cells.
Q: Use of atropine in organophosphate poisoning
A) Activates muscarinic receptors
B) Blocks muscarinic receptors
C) Stimulates nicotinic receptors
D) Enhances acetylcholine
✅ Correct Answer: B
Explanation: Atropine blocks overstimulated muscarinic receptors caused by excess acetylcholine.
Q: Drug of choice for status epilepticus
A) Carbamazepine
B) Diazepam
C) Ethosuximide
D) Lamotrigine
✅ Correct Answer: B
Explanation: Diazepam, a benzodiazepine, is rapidly effective in controlling convulsions.