What is the most important information I should know about isosorbide mononitrate?
Before taking isosorbide mononitrate, tell your doctor if you have congestive heart failure, low blood pressure, or kidney disease. Isosorbide mononitrate can cause severe headaches, especially when you first start using it. These headaches may gradually become less severe as you continue to use the medication. Do not stop taking isosorbide mononitrate. Ask your doctor before using any headache pain medication. Isosorbide mononitrate will not treat an angina attack that has already begun. It is important to keep taking this medicine as directed to prevent an angina attack. Get your prescription refilled before you run out of medicine completely.
