Hydrochlorothiazide is primarily used for what purpose?

Hydrochlorothiazide is primarily used as a diuretic to control hypertension, making it effective for lowering blood pressure by reducing fluid retention and decreasing the volume of blood that the heart has to pump. By promoting the excretion of sodium and water through urine, it helps to relax blood vessels and enhance blood flow. This mechanism is crucial in managing high blood pressure and preventing associated complications such as heart disease and stroke.

While it is important to understand the other options, they pertain to different classes of medications or treatments. Lowering cholesterol levels typically involves statins or other lipid-lowering agents rather than diuretics. Treating diabetes usually requires insulin or oral hypoglycemics, which specifically target blood glucose control. Asthma management often includes bronchodilators or corticosteroids to relieve symptoms and improve lung function, rather than addressing blood pressure or fluid retention. Thus, hydrochlorothiazide's primary role in hypertension management is well-established.