Cavazide 75 mg is a combination medication that includes Captopril, an angiotensin-converting enzyme (ACE) inhibitor, and Hydrochlorothiazide, a thiazide diuretic. This combination is designed to treat hypertension (high blood pressure) and manage congestive heart failure. Captopril helps to relax blood vessels, while Hydrochlorothiazide works by promoting the excretion of sodium and water, which reduces blood volume and lowers blood pressure.