Angiotensin receptor antagonists are a class of drugs that are very commonly used in the treatment of hypertension, and the main varieties include colesartan, valsartan, irbesartan, candesartan, olmesartan, telmisartan, alisartan, and so on. The mechanism of action of these drugs is to block the binding of angiotensin II to its receptor, thus blocking the series of physiological effects produced by the binding of angiotensin II to the receptor, which makes the blood vessels dilate. By reducing peripheral resistance, the effect of lowering blood pressure is achieved. Angiotensin receptor antagonists have similar effects as angiotensin-converting enzyme inhibitors, but do not cause coughing and can be used as an alternative to angiotensin-converting enzyme inhibitors. The side effects of these drugs generally cause elevated blood potassium, elevated blood creatinine, and edema. It is important to monitor the medication and seek medical attention if there are any abnormal manifestations.