Angina pectoris occurs due to increased myocardial oxygen consumption and insufficient oxygen supply. Therefore, treatment requires the administration of drugs that are beneficial in reducing myocardial oxygen consumption and increasing the blood and oxygen supply to the ischemic myocardium. At the same time, because the mechanism of each type of angina varies, the specific drug regimen should be determined according to the specific type. Angina pectoris can be divided into exertional angina, spontaneous angina, variant angina and mixed angina pectoris. Different types of angina are treated with different drug regimens. 1, exertional angina: due to severe stenosis of the coronary arteries restrict the increase of myocardial blood supply during activity, when myocardial oxygen consumption increases, resulting in exertional angina. The main treatment principle is to reduce myocardial oxygen consumption, increase myocardial blood supply, and treat the cause of coronary stenosis. Therefore, the following drugs are commonly used: reduce myocardial oxygen consumption: β-blockers can slow down the heart rate, weaken myocardial contraction, reduce blood pressure, reduce myocardial oxygen consumption and angina attacks, is the first choice of treatment for exertional angina. Common drugs include metoprolol, atenolol, etc. Increase ischemic myocardial blood supply: Nitrate drugs and calcium channel blockers can dilate coronary arteries and increase blood supply to ischemic areas. Common nitrate drugs include nitroglycerin and isosorbide mononitrate, etc. Common calcium channel blocker drugs include amlodipine, felodipine, etc. 2, spontaneous angina, variant angina: in spontaneous angina and variant angina, to quickly relieve vasospastic attacks and reduce the incidence of acute infarction. In acute attacks, nitroglycerin or nifedipine powder can be administered sublingually immediately. Patients should adopt a semi-recumbent position and maintain the original position for 15 minutes after taking the drug to avoid the occurrence of postural hypotension. If it does not work, seek medical attention as soon as possible and do not take large amounts repeatedly. The drug to prevent spasm attack is calcium channel blocker (such as with amlodipine, felodipine, etc.) as the first choice, and with nitrate drugs (such as nitroglycerin and isosorbide mononitrate, etc.). 3, mixed angina: treatment should include the use of vasodilators to prevent vasospasm and constriction, as well as to reduce myocardial oxygen consumption and improve exercise tolerance. Depending on the clinical type, treatment is focused. Commonly used drugs include beta-blockers (e.g., metoprolol, atenolol, etc.), calcium channel blockers (e.g., amlodipine, felodipine, etc.), and nitrates (e.g., nitroglycerin and isosorbide mononitrate). In addition to the above drugs, antiplatelet therapy is routine for patients with coronary artery disease, regardless of the type of angina. Commonly used drugs include aspirin, clopidogrel, etc. Patients who cannot tolerate aspirin can be switched to clopidogrel as an alternative treatment. Because the mechanism of each type of angina varies, the specific medication regimen is determined by the specific type. Patients must visit a hospital and take the medication under the guidance of a specialist, and must not self-medicate. In addition to the above angina, frequent and prolonged episodes of chest pain may be unstable angina, which has a higher risk of progressing to myocardial infarction and therefore requires prompt consultation at the nearest hospital.