Aspirin is available in 25mg, 100 tablet pack, 100mg, 30 tablet pack, and 500mg, 10 tablet pack. Aspirin is a non-steroidal anti-inflammatory drug with antipyretic, analgesic and anti-platelet aggregation effects. 25mg aspirin and 100mg aspirin are commonly used in the treatment and prevention of coronary heart disease and cerebral infarction, and the common dose of aspirin for secondary prevention of coronary heart disease and cerebral infarction is 50-100mg/time, 1 time/day, orally. The specific dose needs to be decided in relation to the risk of bleeding in patients with acute cerebrovascular disease, as well as acute myocardial infarction and acute cerebral infarction, which can be given as 300mg compound orally, and later 50-100mg/day orally. 500mg of aspirin is mainly used for antipyretic and analgesic purposes.