This document summarizes different classes of antihypertensive medications. It lists examples of: 1) ACE inhibitors such as captopril, enalapril, and lisinopril; angiotensin receptor blockers such as losartan and irbesartan; and calcium channel blockers such as amlodipine, nifedipine, and diltiazem. 2) Diuretics such as chlorthiazide, furosemide, and spironolactone. Beta blockers such as propranolol and atenolol are also mentioned. 3) Other antihypertensives mentioned include alpha blockers, central sympathol