The full name of Isosorbide Mononitrate Pills is Isosorbide Mononitrate Drops, which has the effect of dilating coronary arteries, increasing coronary blood flow, improving myocardial ischemia, relieving symptoms of angina pectoris, as well as treating persistent angina pectoris after myocardial infarction, long-term treatment of coronary heart disease, and prevention of angina pectoris. Isosorbide mononitrate drops belong to the nitrate class of drugs, through the release of nitric oxide, activate the enzyme guanylate cyclase, thus relaxing the vascular smooth muscle, to achieve the purpose of vasodilatation. The most common adverse reaction is headache, and occasionally patients experience nausea, vomiting, and facial flushing. It is contraindicated in those who are allergic to isosorbide mononitrate or other components; it should be used with caution in lactating women. This product is not suitable for the treatment of acute attacks of angina pectoris; long-term use of the drug may be tolerated, it is recommended to take the lowest dose, taking the last dose of the day should not be later than dinner time; should avoid drinking alcohol between doses, otherwise it will cause the vasodilator effect to be enhanced; this product is not taken at the same time with sildenafil. The above content is for reference only, patients who need to use isosorbide mononitrate drops, please under the guidance of a professional doctor, reasonable use of medication.