Which of the following is a beta blocker?

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Multiple Choice

Which of the following is a beta blocker?

Explanation:
Beta blockers work by blocking beta-adrenergic receptors, which lowers heart rate and the force of heart muscle contractions, reducing blood pressure. Labetalol does this and also blocks alpha-1 receptors, giving extra vasodilation to help lower pressure. The other drugs aren’t beta blockers: nifedipine is a calcium channel blocker, which relaxes blood vessels by a different mechanism; benazepril is an ACE inhibitor; irbesartan is an ARB. So, the drug that fits the beta-blocker mechanism is Labetalol.

Beta blockers work by blocking beta-adrenergic receptors, which lowers heart rate and the force of heart muscle contractions, reducing blood pressure. Labetalol does this and also blocks alpha-1 receptors, giving extra vasodilation to help lower pressure. The other drugs aren’t beta blockers: nifedipine is a calcium channel blocker, which relaxes blood vessels by a different mechanism; benazepril is an ACE inhibitor; irbesartan is an ARB. So, the drug that fits the beta-blocker mechanism is Labetalol.

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