Aspirin has antipyretic and analgesic effects, etc. It is mainly used for the prevention and treatment of diseases, and for normal people, it is not allowed to take half a tablet a day. Aspirin is mainly used for antipyretic and analgesic effects, relieving fever, headache, muscle pain, neuralgia and toothache caused by various reasons. When used in small doses, it can also resist platelet aggregation and prevent thrombosis. In clinical practice, it is often used in patients with atrial fibrillation, patients with prosthetic heart valve replacement, patients with myocardial infarction, and the prevention and treatment of transient ischemic attack. Aspirin tablets have many adverse reactions, including nausea, vomiting, epigastric pain and other gastrointestinal reactions, and in severe cases may even induce ulcers and bleeding. Contraindications for aspirin tablets include patients with active gastric bleeding or gastric ulcers, patients with severe heart failure, hemophilia, thrombocytopenia, and infants under 3 months of age. Taking half an aspirin a day for a normal person does not have an effective preventive or therapeutic effect on the body and is not recommended, apart from increasing the adverse effects of the drug. In addition, the drug needs to be used under the guidance of a doctor, do not use it blindly on your own.