The antihypertensive drugs of the angiotensin class include angiotensin-converting enzyme inhibitors and angiotensin II receptor antagonists. The representative drugs of angiotensin-converting enzyme inhibitors include captopril, benazepril, enalapril, and ramipril, and the representative drugs of angiotensin II receptor antagonists include candesartan, valsartan, irbesartan, olmesartan, losartan, and telmisartan. Angiotensin class of antihypertensive drugs, mainly acting on the angiotensin system, inhibit system activation, cause vasodilation, reduce the ventricular rate causing a drop in blood pressure, clinically mainly used in patients with hypertension, diabetes, renal disease and cardiac insufficiency.