The functions of aspirin are mainly to inhibit platelet aggregation, prevent thrombosis as well as antipyretic and analgesic. It can be used in the treatment of cardiovascular diseases, acute rheumatic fever and rheumatoid arthritis and other diseases. Aspirin is clinically used in cardiovascular diseases such as angina pectoris, myocardial infarction, artificial heart valve disease and thrombosis after arteriovenous surgery. Antipyretic and analgesic main peripheral analgesic effect through the regulation of the thermoregulatory center and reduce the sensitivity of pain-causing substances. It plays a role in relieving mild to moderate pain and reducing fever, and is clinically used in acute rheumatic fever, rheumatoid arthritis and other diseases. The use of aspirin should be noted: aspirin allergy and suffering from bleeding disorders, such as capillary dilatation, hereditary purpura simplex is prohibited; with serious chronic diseases need to be used with caution. Aspirin adverse reactions: may cause indigestion, nausea and vomiting, stomach pain and other symptoms, and in severe cases can also cause asthma, bleeding and other symptoms. Aspirin can not self-adjust the dose or stop taking the drug, it should be used correctly under the guidance of a doctor to avoid adverse effects.