ARB and ACEI are the abbreviations of two types of antihypertensive drugs commonly used in clinical practice, ARB is also called angiotensin II receptor antagonist, the general composition is Crosartan, Valsartan, Irbesartan, Temisartan, that is, the end of the sartan class is the ARB class antihypertensive drugs. ACEI class antihypertensive drugs are also called angiotensin converting enzyme inhibitors, the general composition is Captopril, Enalapril, Benazepril ACEI class antihypertensive drugs and ARB class antihypertensive drugs are clinically very good antihypertensive drugs, but there are some precautions in the process of taking these two drugs, such as ACEI class antihypertensive drugs, many people in the process of taking coughing side effects, but after taking ARB class antihypertensive drugs The chances of coughing are lower. These two types of antihypertensive drugs have some common contraindications, such as hyperkalemia, pregnant women, and patients with bilateral renal artery stenosis, both of which should not be taken. In patients with renal insufficiency, especially when creatinine >3mg/dL, both types of antihypertensive drugs should be applied with caution, and renal function should be monitored during application, and blood potassium should be monitored.