Reliance generally refers to Isosorbide Nitrate for Injection, which works to dilate blood vessels and can treat left ventricular failure secondary to acute myocardial infarction. Isosorbide nitrate for injection can relax the smooth muscle of blood vessels, thus dilating peripheral arteries and veins, belonging to a kind of vasodilator drugs. Its main ingredient is isosorbide nitrate, which is currently commonly used in clinical practice for left ventricular failure secondary to therapeutic myocardial infarction, or left ventricular failure due to various causes, as well as severe or unstable angina pectoris. However, it should be noted that some patients may experience adverse reactions such as headache, nausea and tachycardia during the use of isosorbide nitrate for injection. In particular, nitrate allergy, cardiogenic shock, circulatory failure and severe hypotension, or obvious anemia, cerebral hemorrhage and other people, need to contraindicate the use of Isosorbide Nitrate for Injection, so as not to damage their health. If patients want to use injectable isosorbide nitrate, need to combine their own situation, ask the doctor’s guidance, do not use without authorization, in order to avoid damage to health.