Secondary prevention medications for cerebral infarction are mainly anti-platelet aggregation classes, such as aspirin or clopidogrel. Patients may be advised to take oral clopidogrel if they have significant stomach discomfort and a history of gastric ulcers. Oral statins, such as atorvastatin, resulvastatin, and simvastatin, should also be taken. There are more statins on the market, and the general internationally recognized one is considered atorvastatin, also known as Lipitor, which has a certain effect of stabilizing plaque and making it shrink. However, experiments have shown that atorvastatin has certain liver damage, so if the patient has abnormal liver function, such as elevated transaminases, it is recommended to replace the drugs such as Rosuvastatin or pitavastatin, and at the same time, the blood routine and liver function related indicators should be reviewed regularly.