Coronary artery bypass surgery only solves the patient’s current heart ischemia problem and relieves angina pectoris. It does not change the causative factors of coronary heart disease, such as obesity, high blood pressure, diabetes, etc. Therefore, long-term regular medication is still required after bypass surgery. For example, lifelong aspirin; long-term lipid-lowering drugs are needed according to lipid control; good control of blood pressure and blood sugar; nitrates need to be taken for 3 months and continued or discontinued according to the recovery of symptoms after surgery; betalactam sometimes needs to be taken for a long time; and so on. These drugs need to be adjusted to the hospital to review the dose or stop time, by the doctor for you to adjust, do not stop the medication on their own. Some drugs have contraindications or interactions with each other, so when you add other drugs, you are also recommended to go to the hospital and use them under the guidance of your doctor. Medication is the basic treatment of coronary heart disease and needs to be adhered to for a long time.