Blog

Isosorbide Mononitrate

by OPC Posted on May 3, 2008
Reading time: 2 minutes

Isosorbide mononitrate is used to prevent angina attacks (chest pain). It works by relaxing the blood vessels. When blood vessels are dilated, it is easier for the heart to pump. Also, more blood, which is rich in oxygen, can flow to the heart.

Important Information about Isosorbide Mononitrate

Always sse this medication exactly as prescribed by your doctor. You may develop a headache because of this medicine, but do not stop taking it. Take aspirin or acetaminophen to treat the headache. Avoid consuming alcohol while taking this medication.

Do not stop taking Isosorbide Mononitrate suddenly. Stopping suddenly could cause a severe angina attack.

Before taking this medication, tell your doctor if you

  • have had a heart attack;
  • have congestive heart failure;
  • have low blood pressure;
  • have had a stroke, a transient ischemic attack (TIA, or mini-stroke), or a serious head injury;
  • have anemia;
  • have an allergy to nitrates;
  • have closed-angle glaucoma;
  • suffer from migraines;
  • have kidney disease; or
  • have liver disease.

Isosorbide Mononitrate Side Effects

Serious side effects include:

  • An allergic reaction – difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives;
  • blurred vision or dry mouth; or
  • irregular heartbeat;
  • fainting.

Common side effects include:

  • Headache, dizziness, or weakness;
  • flushing (redness of the face, neck, and chest);
  • nausea or vomiting;
  • a fast heartbeat;
  • swollen ankles.

This information is advisory only. It does not contain all information about this medication. If you have any questions about Imdur, ask your doctor, pharmacist, or health care provider.

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