Xinkang Tablets, also called isosorbide mononitrate, is a long-acting nitrate drug. This drug can be used for the treatment of various types of angina pectoris and acute myocardial infarction. For the existence of pulmonary arterial hypertension or hypertension, heart failure patients also has a certain improvement effect. It is very widely used in the clinic, in the application process is not recommended to use this drug 24 hours a day, because this drug is relatively easy to develop drug resistance, so in the application of the best use of eccentric therapy, that is, every day is recommended to have a period of time is a blank period. This medication can either be taken orally or administered through an intravenous drip to relieve the patient’s uncomfortable symptoms. If taken orally, generally speaking, 20mg can be taken 2-3 times a day and can be swallowed with a meal. Depending on the severity of the patient’s actual symptoms, the maximum dose can be increased to 60mg per day.