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: Warfarin acts by inhibiting
A) Fibrinolysis
B) Thrombin activity
C) Vitamin K epoxide reductase
D) Platelet function
✅ Correct Answer: C
Explanation: Warfarin prevents clot formation by inhibiting the enzyme that recycles vitamin K.
Q: Primary adverse effect of aminoglycosides
A) Constipation
B) Hypoglycemia
C) Nephrotoxicity
D) Bronchospasm
✅ Correct Answer: C
Explanation: Aminoglycosides can accumulate in renal tissue and damage nephrons.
Q: Naloxone is administered to reverse
A) Acetaminophen toxicity
B) Alcohol poisoning
C) Benzodiazepine toxicity
D) Opioid overdose
✅ Correct Answer: D
Explanation: Naloxone is an opioid receptor antagonist used to reverse opioid-induced respiratory depression.
Q: Therapeutic use of salicylates
A) Analgesia
B) Antipsychotic action
C) Sedation
D) Antiviral activity
✅ Correct Answer: A
Explanation: Salicylates like aspirin are effective pain relievers and anti-inflammatory agents.
Q: Use of atropine in clinical emergency
A) Seizures
B) Bradycardia
C) Hyperkalemia
D) Anemia
✅ Correct Answer: B
Explanation: Atropine blocks vagal stimulation to the heart, raising heart rate in bradycardia.