Isosorbide Nitrate Tablets can be taken before or after meals, and the time of day it is taken does not usually affect the effectiveness of the drug. Isosorbide nitrate tablets are mainly taken by sublingual or swallowed. It is mainly used for the long-term prevention and treatment of coronary heart disease or angina pectoris, and plays a role in the prevention and treatment of coronary heart disease. Adverse reactions such as facial flushing, dizziness, and upright hypotension may occur after administration. The safety of the drug in children has not been established, and the drug should be used with caution in pregnant women, lactating women, patients with aortic or mitral stenosis, postural hypotension, and those with increased intracranial pressure. The use of this drug is contraindicated in cases of hypersensitivity to this drug or to the components of the formula, acute circulatory failure, severe hypotension, severe anemia. The specific dosage and usage of the above drugs should follow the doctor’s instructions, and should not be used on their own to avoid adverse reactions.