Nitrates in the clinical common drugs are nitroglycerin, isosorbide nitrate, isosorbide mononitrate and so on. 1. Nitroglycerin: it is a kind of flammable and explosive liquid, belonging to nitro vasodilator drugs. It is mainly used to relieve angina pectoris, myocardial infarction and congestive heart failure; it is also used to induce hypotension and control hypertension during surgery. Nitroglycerin adverse reactions include persistent throbbing headache and blurred vision. Note that nitroglycerin is contraindicated in patients who are allergic to nitroglycerin. 2. Isosorbide nitrate: Isosorbide nitrate is a nitro vasodilator. It is mainly used in myocardial infarction combined with left heart failure to relieve angina and heart failure. Isosorbide nitrate adverse reactions include drowsiness, nausea and so on. Attention to isosorbide nitrate allergy patients prohibited. 3. Isosorbide mononitrate is an active metabolite of isosorbide nitrate. It is mainly used in the treatment of coronary heart disease, persistent angina after myocardial infarction, treatment of chronic congestive heart failure with digitalis and/or diuretics; it is also used in the prevention of angina pectoris. Adverse reactions to isosorbide mononitrate include persistent throbbing headache and blurred vision. Note that isosorbide mononitrate is contraindicated in patients who are allergic to isosorbide mononitrate. The above drugs need to be taken under the guidance of a doctor, do not take them on your own to avoid delays.