Pharmacology · single question
What is the mechanism of action of verapamil?
Show answer and explanation
Correct answer: C. Calcium channel blocker
- A. Beta-blockers act on adrenergic receptors, not calcium channels.
- B. ACE inhibitors act on the renin-angiotensin system.
- C. Correct. Verapamil blocks voltage-dependent calcium channels (notably cardiac), reducing contractility and rate.
- D. Diuretics act on the kidney, a different mechanism.