How much atorvastatin to take in two years of bypass should refer to the patient’s LDL level, and the regular dose is 20mg per day. Bypass patients belong to severe coronary heart disease, coronary heart disease patients recommended long-term oral statin therapy, atorvastatin belongs to the common use of one of the drugs, most of the patients of the routine oral dose of 20mg, but the specific oral dose should refer to the patient’s low-density lipoprotein level. Patients with severe coronary artery disease are recommended to control the level of LDL at <1.4mmol/L. In the course of taking atorvastatin, it is recommended to review the blood lipid level regularly, and adjust the dosage of the drug according to the level of LDL. The main effect of atorvastatin is to inhibit cholesterol synthesis, and at the same time, it can stabilize plaque. Adverse effects of the drug include nausea, vomiting, muscle pain, elevated liver enzymes, etc. It is contraindicated in patients who are allergic to the components of the drug, or those who have severe hepatic function impairment. Patients taking atorvastatin orally after bypass surgery should choose the appropriate dosage under the guidance of a physician and pay attention to the adverse effects of the drug.