Bay Aspirin is known generically as aspirin enteric-coated tablets. Aspirin is used for the prevention of thrombotic diseases, usually need to be used for a long time in order to maintain a stable blood concentration, if there are adverse reactions need to stop the drug and consult a doctor. Aspirin is mainly used as an antiplatelet aggregation drug, commonly used in the prevention of thromboembolic diseases of the heart and brain. When the drug is used as an antiplatelet drug, it is often necessary to use long-term medication, or even lifelong medication. In the use of the drug, if serious adverse reactions such as gastrointestinal bleeding, intracranial hemorrhage, skin hematoma, etc. occur, it is necessary to stop the drug in time and consult a doctor. The drug is contraindicated in cases of drug allergy, active gastrointestinal ulcers or bleeding, abnormal coagulation function, severe functional impairment of the liver, kidney, heart, etc., treatment with methotrexate and other drugs, and late pregnancy. Caution is advised in case of previous peptic ulcers or bleeding, on anticoagulant therapy, perioperative period, and so on. Aspirin is recommended to be used under the supervision of a clinician.