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: Sulfonylureas help manage diabetes by stimulating
A) Fat metabolism
B) Protein synthesis
C) Insulin secretion
D) Glucagon release
✅ Correct Answer: C
Explanation: Sulfonylureas increase insulin release from pancreatic beta cells.
Q: Nitroglycerin relieves chest pain through
A) Vasodilation
B) Muscle relaxation
C) Anticoagulation
D) Bronchodilation
✅ Correct Answer: A
Explanation: Nitroglycerin relaxes vascular smooth muscle, reducing cardiac workload.
Q: Fluoroquinolones exert antibacterial action by inhibiting
A) DNA gyrase
B) Cell wall synthesis
C) Peptidoglycan linkage
D) Ribosomal subunits
✅ Correct Answer: A
Explanation: These antibiotics disrupt bacterial DNA replication by targeting DNA gyrase.
Q: SSRIs are commonly prescribed to treat
A) Hypertension
B) Asthma
C) Depression
D) Epilepsy
✅ Correct Answer: C
Explanation: SSRIs increase serotonin levels in the brain, improving mood.
Q: Methotrexate interferes with cell division by inhibiting
A) Glucose absorption
B) Iron transport
C) Lipid synthesis
D) Folate metabolism
✅ Correct Answer: D
Explanation: Methotrexate blocks dihydrofolate reductase, essential for DNA synthesis.