Aspirin can prevent cerebral infarction is true, when taking the need to be under the guidance of a doctor, according to the condition of reasonable consumption. Aspirin is a non-steroidal anti-inflammatory drug, also has antipyretic and analgesic, anti-inflammatory and anti-rheumatic and anti-thrombotic effects, generally used for antipyretic, analgesic, anti-inflammatory, anti-rheumatic and so on. Aspirin is an anti-platelet aggregation drug, which can prevent platelet aggregation caused by atherosclerosis, and thus cerebral infarction caused by thrombosis in the brain. But another type of thrombus may come from an intra-atrial appendage thrombus, most often seen in patients with atrial fibrillation. Thrombus detachment through the blood flow into the cerebral blood vessels, which in turn leads to cerebral embolism, can not be prevented by aspirin, often using anticoagulant drugs such as warfarin. Adverse effects of aspirin: gastrointestinal reactions, rash, itchy skin, hematuria, vertigo, seizures, aspirin asthma, dyspnea and so on. It is recommended that patients, should be under the guidance of a doctor to take medication reasonably, the cause, symptomatic treatment, to prevent misunderstanding of the condition.