Candesartan is a drug of ARB class, also known as angiotensin receptor antagonist. The main effect can inhibit vasoconstriction, thus reducing the resistance of peripheral blood vessels, which can generally reduce blood pressure and heart rate, reduce cardiac bleeding, improve ejection fraction and have a protective effect on renal function, and is mainly used in clinical practice to lower blood pressure. It is mainly used for lowering blood pressure in clinical practice. The dosage is 1 tablet once a day. Adverse reactions may include upright hypotension, hepatic and renal insufficiency and gastrointestinal symptoms such as nausea, vomiting, yellow-green vision, in addition to laryngeal edema and so on. Therefore, it is important to measure blood pressure while taking it and adjust the dosage of the drug according to the fluctuation of blood pressure.