Inadequate myocardial blood supply is mostly caused by coronary artery disease, and it is necessary to take drugs to relieve symptoms and improve prognosis, as well as to treat combined high-risk factors and slow down the progression of atherosclerosis. 1, symptom relief drugs: mainly include beta-blockers, nitrate drugs and calcium channel blockers. beta-blockers reduce heart rate and myocardial oxygen consumption, such as metoprolol, atenolol and bisoprolol; nitrate drugs dilate blood vessels and improve the onset of angina, such as isosorbide 5-mononitrate, isosorbide mononitrate extended-release preparations; calcium channel blockers reduce myocardial oxygen consumption by improving coronary artery blood flow and reducing Calcium channel blockers play the role of relieving angina by improving coronary blood flow and reducing myocardial oxygen consumption, such as amlodipine, felodipine, nifedipine, etc. 2, improve the prognosis of drugs: patients with myocardial ischemia need to prevent blood clots. Aspirin prevents thrombosis through the effect of anti-platelet aggregation, and should be taken by all patients without contraindications. Patients who cannot tolerate aspirin can be treated with clopidogrel as an alternative. Statin lipid-lowering drugs can lower cholesterol, stabilize plaque and prevent the progression of atherosclerotic plaque. beta-blockers can improve the prognosis of patients with coronary heart disease; angiotensin-converting enzyme drugs can improve the prognosis of patients with coronary heart disease with previous myocardial infarction or combined heart failure. 3, prevention of high-risk factors: patients with combined hypertension or hyperglycemia, hyperlipidemia, but also need to control blood pressure, blood sugar, lipids, slowing the progress of atherosclerosis. Pay attention to a light diet and stop smoking and drinking. All of the above drugs should be taken under the guidance of a doctor, and patients should not use drugs at their own discretion.