Statin lipid-lowering drugs take how long clinically there is no clear rules, taking three months is not a clear rule. The main role of statin lipid-lowering drugs is to reduce cholesterol, triglycerides also have a certain control effect. Clinically, before using the drug, to understand the specific condition, simple lipid elevation of patients can take short-term statin drugs, lipid stable can gradually stop drugs, clinically there is no provision for lipid-lowering drugs need to be taken orally for three months, the specific course of treatment according to the condition. For patients with cardiovascular and cerebrovascular diseases, such as cerebral infarction myocardial infarction patients, the need for long-term oral statin drugs, low-density lipoprotein control to a relatively low level, statin drugs also have a stabilizing effect on plaque, reduce the incidence of cardiovascular and cerebrovascular diseases. Adverse effects of statins include nausea, vomiting, constipation, myalgia, arthralgia, etc. They are contraindicated in patients who are allergic to the components of the drug, have unexplained elevated liver enzymes, or have severe hepatic impairment. Statins should be used under the guidance of a physician to establish a specific dosing schedule.