Clopidogrel is required for the treatment of ST-segment elevation acute coronary syndromes for at least 4 weeks or as directed by a physician, and adverse reactions and contraindications must be noted. Clopidogrel is an antiplatelet aggregating drug. It is commonly used to prevent atherosclerotic thrombosis after acute coronary syndrome and other diseases, when used in ST-segment elevation acute coronary syndrome antithrombotic therapy, at least 4 weeks of medication; if the combination of other high-risk factors for thrombosis, it is recommended that the clinician give a comprehensive assessment of the drug program, and follow the doctor’s instructions for medication. The drug is contraindicated in cases of allergy to clopidogrel and other drug components, severe hepatic impairment, active bleeding in the gastrointestinal tract or intracranial areas, etc. Avoid concomitant use with aspirin, ibuprofen and other non-steroidal anti-inflammatory drugs, heparin and other drugs. The drug is not recommended for women during pregnancy and breastfeeding. With symptoms such as rash and vomiting, it is recommended to stop the drug and seek medical attention. Clopidogrel needs to be used under the guidance of a clinician, and unauthorized use of the drug is prohibited.