Clopidogrel can be taken once a day, both on an empty stomach and after meals. There is no restriction on the time of administration, but it should be taken at a fixed time every day. Clopidogrel is a new antiplatelet drug, widely used in myocardial infarction, ischemic stroke, acute coronary syndrome and other diseases. The drug is a precursor drug and needs to be converted by the liver before it becomes active. Patients need to avoid taking it at the same time with drugs that lower liver enzymes, such as omeprazole, which can reduce its blood concentration by 50%. In addition, patients are advised to take the drug once a day and at a fixed time every day, and not to miss or stop taking it at will, in order to ensure the effective blood concentration and make the drug effect more lasting and stable. In addition, since the drug is a prescription drug, patients should take it under the guidance of a doctor. Severe liver damage, allergy to the ingredients of this product, active bleeding, and breastfeeding women are contraindicated groups.