Which of the following medications is classified as an Alpha-1 Blocker?

Doxazosin is classified as an Alpha-1 Blocker, which is a category of medications that work by blocking alpha-1 adrenergic receptors. This action leads to the relaxation of smooth muscle, particularly in the blood vessels, resulting in vasodilation and a decrease in blood pressure. Alpha-1 blockers are commonly used to treat conditions such as hypertension and benign prostatic hyperplasia, where reducing blood vessel resistance or improving urinary flow is beneficial.

Other medications mentioned do not fall under this classification. Valsartan and Losartan are Angiotensin II receptor blockers (ARBs), primarily used for hypertension and heart failure. Minoxidil is a vasodilator that works differently and is mainly used for severe hypertension or hair loss treatment. Understanding the mechanisms and classifications of these drugs is crucial for comprehending how they are utilized in clinical practice.