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 including beta-blockers, nitrate drugs and calcium channel blockers. beta-blockers reduce heart rate, weaken myocardial contractility, lower blood pressure, thereby reducing myocardial oxygen consumption, such as metoprolol, atenolol and bisoprolol; nitrate drugs can reduce myocardial hypoxia and improve myocardial perfusion, improve the onset of angina, such as isosorbide mononitrate, isosorbide mononitrate Slow-release preparations; calcium channel blockers inhibit myocardial contraction, reduce myocardial oxygen consumption, and also dilate coronary arteries, release coronary spasm, improve the blood supply to the subendocardial myocardium, and also dilate peripheral vessels, reduce arterial pressure, and reduce cardiac load, such as amlodipine, felodipine, nifedipine, etc. 2, improve the prognosis of drugs: aspirin has the effect of anti-platelet aggregation, all patients should take if there is no contraindication to the use of drugs. Patients who cannot tolerate aspirin can switch to clopidogrel. 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 play a role in improving the prognosis of patients with coronary heart disease. 3.Prevention of high-risk factors: Patients with combined hypertension or hyperglycemia and hyperlipidemia also need to control blood pressure, blood sugar and blood lipid at the same time to slow down the progress of atherosclerosis. Pay attention to a light diet and quit 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.