There are five major classes of antihypertensive drugs in common use, namely, diphenhydramine, priligy, sartan, diuretics and lorrel. Diphenhydramine is mainly a calcium antagonist, mainly through the dilatation of blood vessels to lower blood pressure, commonly used drugs are nifedipine controlled-release tablets, amlodipine, felodipine extended-release tablets, lacidipine and so on. Priligy is mainly used to lower blood pressure by diastolic small arteries and reducing blood volume, commonly used drugs include Benadryl, Perindopril, Ramipril, etc. The mechanism of action of sartans is the same as that of prilosecs, and the main difference is that the body system links are different. The commonly used drugs are mainly coxsartan, valsartan, temisartan, olmesartan, etc. Diuretics mainly reduce blood volume by promoting sodium and drainage in the body, and the commonly used drugs are mainly indapamide and hydrochlorothiazide. Rolls mainly lower blood pressure by slowing down the heart rate and reducing the contractility of the heart, and the commonly used drugs are bisoprolol and metoprolol extended-release tablets.