Which medication is classified as a selective beta-1 blocker for hypertension?

Atenolol and metoprolol are both classified as selective beta-1 blockers. These medications specifically target the beta-1 adrenergic receptors primarily found in the heart. By selectively blocking these receptors, they reduce heart rate and myocardial contractility, leading to decreased cardiac output and overall lower blood pressure, making them effective in managing hypertension.

In contrast, carvedilol and labetalol are not selective. They are non-selective beta blockers that also block alpha-1 adrenergic receptors, causing additional vasodilation and reducing vascular resistance. While these medications can also be used to treat high blood pressure, they do not fit the classification of selective beta-1 blockers.

Choosing metoprolol as the answer highlights its role as a targeted therapy in treating hypertension through its specific action on beta-1 receptors, which is essential for understanding medication classifications and their respective mechanisms in blood pressure management.