Pharmacology · single question
A hypertensive patient takes metoprolol. Mechanism of action of this antihypertensive?
Show answer and explanation
Correct answer: C. Competitively inhibits β1 receptors
- A. Incorrect. That describes nitrates/some vasodilators, not metoprolol.
- B. Incorrect. Calcium-channel blockade describes drugs like amlodipine.
- C. Correct. Metoprolol is a cardioselective (β1) beta blocker, lowering heart rate and cardiac output to reduce blood pressure.
- D. Incorrect. β2 blockade would risk bronchospasm; metoprolol is selective for β1 (important in this asthmatic patient).