The drugs used to treat hypertension are divided into the following five categories: 1. diuretics, such as hydrochlorothiazide, furosemide, torasemide, etc. At present, hydrochlorothiazide diuretics are mostly used in combination with other antihypertensive drugs to achieve better antihypertensive effects. 2. calcium antagonists, which are also widely used, are more effective, and a wide range of calcium antagonists are currently used in clinical practice, with representative drugs such as nifedipine, amlodipine, felodipine, etc. 3. Nifedipine, amlodipine, felodipine, etc. 3, angiotensin II receptor antagonists, such as irbesartan, temisartan, valsartan, etc. 4, angiotensin converting enzyme inhibitors, such as Lodin, captopril, enalapril, etc. 5, beta-blockers, such as betalactam, Conotene, etc. In addition to the above five categories of antihypertensive drugs there are sympathetic nerve inhibitors such as reserpine, direct vasodilators such as hydrazidiazide, etc.