Which of the following is an example of a common ARB?

Losartan is recognized as a common angiotensin receptor blocker (ARB) utilized in the treatment of hypertension and certain other cardiovascular conditions. ARBs work by inhibiting the effects of angiotensin II, a hormone that causes blood vessels to constrict; by blocking its action, ARBs help to relax blood vessels, which lowers blood pressure.

This mechanism contributes to their effectiveness in reducing the risk of stroke, heart attack, and kidney problems related to hypertension. In contrast, the other options provided represent different classes of medications. Amlodipine is a calcium channel blocker, which works by preventing calcium from entering cells of the heart and blood vessel walls, leading to relaxation of blood vessels. Hydrochlorothiazide is a thiazide diuretic that helps the body eliminate excess fluid, thereby lowering blood pressure. Diltiazem is also a calcium channel blocker but has distinct uses, particularly in the management of angina and certain heart rhythm disorders.

Understanding these differences highlights why Losartan is classified specifically as an ARB and how it functions pharmacologically to manage hypertension effectively.