Clopidogrel is mainly used in clinical practice to inhibit platelet aggregation and belongs to ADP receptor antagonist, clopidogrel is indicated for recent ischemic stroke, acute myocardial infarction, peripheral arterial disease, and also to reduce the occurrence of arterial occlusion, relatively more common adverse reactions are bleeding, gastrointestinal reactions, rash, and some patients may also experience leukopenia, generally after 3-7 days of administration can The plasma concentration is proportional to the dose used. This drug is mainly metabolized by the liver and has a half-life of about 8 hours. For patients with acute coronary syndrome episodes, a combination with aspirin, called dual anti, or double antiplatelet, is recommended. For patients with renal insufficiency, no dose adjustment is required for use. It is a commonly used drug after stenting for coronary artery disease and usually requires a year of combined use with aspirin.