Which of the following is NOT among the antihypertensive examples given?

• A. Albuterol
• B. Sodium nitroprusside
• C. Enalapril
• D. Hydralazine

Answer: (A)

Albuterol is a bronchodilator that acts on beta-2 receptors in the lungs to relieve bronchospasm. It does not primarily lower blood pressure and is not used as an antihypertensive. The other drugs are antihypertensives with different mechanisms: sodium nitroprusside is a rapid-acting vasodilator used in hypertensive emergencies, enalapril is an ACE inhibitor that lowers blood pressure by reducing angiotensin II formation, and hydralazine directly relaxes arterial smooth muscle to decrease vascular resistance. Because albuterol doesn’t fit the role of an antihypertensive, it’s the one that doesn’t belong among the antihypertensive examples.