Comprehensive Practice
Questions and Answers |
2026–2027
Description: This revision set contains 200 multiple-choice questions (MCQs)
covering advanced pharmacology, including pharmacokinetics, pharmacodynamics,
pharmacogenomics, autonomic pharmacology, cardiovascular drugs, CNS drugs,
antimicrobials, endocrine drugs, chemotherapy, toxicology, and clinical
applications. Each question includes four options with the correct answer marked ✅.
Answers are randomly distributed to avoid patterns.
Keywords: advanced pharmacology, pharmacokinetics, pharmacodynamics,
pharmacogenomics, autonomic drugs, cardiovascular pharmacology, CNS
pharmacology, antimicrobials, endocrine pharmacology, chemotherapy, toxicology,
clinical pharmacology, MCQs, revision, 2026–2027.
1. Which phase of pharmacokinetics involves the movement of a drug from its site
of administration into the systemic circulation?
A. Distribution
B. Metabolism
C. Absorption ✅
D. Excretion
,2. Which enzyme system is most responsible for phase I drug metabolism?
A. Cytochrome P450 ✅
B. Glucuronyl transferase
C. Acetyltransferase
D. Sulfotransferase
3. A drug with a narrow therapeutic index is best described as one that:
A. Has a wide margin between therapeutic and toxic doses
B. Requires no therapeutic drug monitoring
C. Has a small margin between therapeutic and toxic doses ✅
D. Is always safe in overdose
4. Which route of administration bypasses first-pass metabolism?
A. Oral
B. Rectal (partially)
C. Intravenous ✅
D. Enteral
5. The volume of distribution (Vd) is a measure of:
A. Drug clearance
B. Apparent space available for drug distribution ✅
C. Rate of drug absorption
D. Protein binding capacity
6. Which of the following is a phase II metabolic reaction?
A. Oxidation
B. Reduction
C. Hydrolysis
D. Glucuronidation ✅
7. A drug that is a competitive antagonist will:
A. Shift the dose-response curve to the right ✅
B. Shift the dose-response curve to the left
,C. Reduce the maximal efficacy
D. Have no effect on agonist response
8. Which of the following best describes a partial agonist?
A. Produces a maximal response equal to a full agonist
B. Produces a submaximal response even at full receptor occupancy ✅
C. Blocks the receptor completely
D. Has no affinity for the receptor
9. The therapeutic index is calculated as:
A. ED50 / LD50
B. LD50 / ED50 ✅
C. TD50 / ED50
D. ED50 / TD50
10. Which of the following drugs is a potent inhibitor of CYP3A4?
A. Rifampin
B. Ketoconazole ✅
C. Phenytoin
D. Carbamazepine
11. Which of the following is a prodrug?
A. Aspirin
B. Enalapril ✅
C. Atorvastatin
D. Metoprolol
12. First-order elimination kinetics means that:
A. A constant amount of drug is eliminated per unit time
B. A constant fraction of drug is eliminated per unit time ✅
C. Elimination is independent of plasma concentration
D. Elimination is saturable
, 13. Which of the following is true about zero-order kinetics?
A. The rate of elimination is proportional to plasma concentration
B. A constant amount of drug is eliminated per unit time ✅
C. It is the most common type of elimination
D. It follows first-order principles
14. Which receptor type is a ligand-gated ion channel?
A. G protein-coupled receptor
B. Nicotinic acetylcholine receptor ✅
C. Tyrosine kinase receptor
D. Nuclear receptor
15. Which of the following is a G protein-coupled receptor?
A. Insulin receptor
B. Muscarinic acetylcholine receptor ✅
C. Nicotinic receptor
D. Steroid receptor
16. Which second messenger is increased by beta-adrenergic receptor activation?
A. cAMP ✅
B. IP3
C. DAG
D. cGMP
17. Which of the following is an example of a drug that acts via a nuclear receptor?
A. Propranolol
B. Prednisolone ✅
C. Atropine
D. Lidocaine
18. Acetylcholine is synthesized by which enzyme?
A. Acetylcholinesterase
B. Choline acetyltransferase ✅