Which medication is a beta-blocker?

Which medication is a beta-blocker?

• A. Metoprolol
• B. Losartan
• C. Amlodipine
• D. Enalapril

Answer: (A)

Beta-blockers work by blocking beta-adrenergic receptors in the heart, especially the beta-1 receptors, which slows heart rate and reduces the force of contraction, helping to lower blood pressure. Metoprolol is a cardioselective beta-1 blocker, so it qualifies as a beta-blocker. The other drugs here act through different mechanisms: Losartan blocks angiotensin II receptors, Amlodipine is a calcium channel blocker that dilates vessels, and Enalapril inhibits the enzyme that makes angiotensin II. So Metoprolol is the beta-blocker among these options.

Beta-blockers work by blocking beta-adrenergic receptors in the heart, especially the beta-1 receptors, which slows heart rate and reduces the force of contraction, helping to lower blood pressure. Metoprolol is a cardioselective beta-1 blocker, so it qualifies as a beta-blocker. The other drugs here act through different mechanisms: Losartan blocks angiotensin II receptors, Amlodipine is a calcium channel blocker that dilates vessels, and Enalapril inhibits the enzyme that makes angiotensin II. So Metoprolol is the beta-blocker among these options.