Isosorbide Mononitrate Extended-Release Capsules can be taken at night to treat myocardial ischemia and lower blood pressure. It is recommended to use the drug under the guidance of a doctor, and its medication program is different for different conditions. Isosorbide mononitrate extended-release capsules can be used to treat myocardial ischemia. There is no special requirement for the specific time of use, generally can be taken at night, its effect usually lasts more than 20 hours. It can prevent myocardial ischemia during sleep, but it should be noted that the drug should not be stopped suddenly. Isosorbide Mononitrate Extended-Release Capsules side effects are relatively common and can cause headache, low blood pressure or dizziness. It can also affect the patient’s heart rate. It may also dilate blood vessels during the initial phase of treatment, causing headaches or flushing, which usually recovers when the drug is discontinued. It is contraindicated in patients who are allergic to the drug. If you need to use this product, please regulate its use under the guidance of a doctor to avoid adverse consequences.