Which of the following is a calcium channel blocker?

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Multiple Choice

Which of the following is a calcium channel blocker?

Explanation:
Calcium channel blockers inhibit L-type calcium channels in vascular smooth muscle (and sometimes the heart), causing arteries to relax and blood pressure to fall. Amlodipine is a calcium channel blocker, specifically a dihydropyridine that mainly relaxes arterial smooth muscle to lower blood pressure. The other drugs work by different mechanisms: lisinopril is an ACE inhibitor, irbesartan is an ARB, and metoprolol is a beta-blocker. Therefore, amlodipine best fits the calcium channel blocker mechanism.

Calcium channel blockers inhibit L-type calcium channels in vascular smooth muscle (and sometimes the heart), causing arteries to relax and blood pressure to fall. Amlodipine is a calcium channel blocker, specifically a dihydropyridine that mainly relaxes arterial smooth muscle to lower blood pressure. The other drugs work by different mechanisms: lisinopril is an ACE inhibitor, irbesartan is an ARB, and metoprolol is a beta-blocker. Therefore, amlodipine best fits the calcium channel blocker mechanism.

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