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Imdur (Isosorbide Mononitrate)

Last updated on November 17th, 2021

Generic name: Isosorbide Mononitrate

Brand names: Imdur

Imdur Information:

Imdur is in a group of drugs called nitrates. Imdur dilates (widens) blood vessels, making it easier for blood to flow through them and easier for the heart to pump. This remedy is also prescribed to prevent angina attacks (chest pain). But Imdur will not treat an angina that has already begun.

Your doctor may prescribe this remedy for other purposes. Contact your physician if you need to learn more information about this drug.

Don’t stop treatment with Imdur earlier than it was prescribed by your doctor even if you notice improvements of your condition. Stopping the medication too early may worsen your condition. Be careful about doing dangerous tasks, driving, operating machinery or climbing until you are aware how this drug affects you. Don’t drink alcohol. Always contact a medic before giving Imdur to a child.

Visit your physician regularly. Make regular blood test. Check your pulse rate and blood pressure often.

This remedy can cause serious fetal harm (possibly death) if it is taken during the last six months of pregnancy. Inform your doctor immediately if you get pregnant or think you may be pregnant.

Caution is advised during treatment with this remedy in the elderly peope since they may be more sensitive to its effects, especially dizziness.

Contact your physician before using salt substitutes or low salt products. You may get drowsy or dizzy.


What symptoms or conditions should I report to a doctor before I take this medicine?

It is important to report to a doctor if you have or had the following conditions:

  • low blood pressure
  • congestive heart failure
  • allergy to Imdur, other dyes, medicines, foods or preservatives
  • kidney disease

How do I take this medicine?

Note: This remedy was prescribed to you only. Don’t share this medicament with others. Follow strictly your doctor’s recommendations. Don’t take more or longer than your doctor recommended.

Imdur is taken regularly with or without food at the same time each day.


Taking any medicine in large doses you can have serious consequences for your health. If you feel an overdose, contact your health care professional instantly.

In large doses, this remedy may cause the following conditions: seizure (convulsions)., fever, dizziness or spinning sensation, trouble breathing, vomiting, feeling light-headed, bloody diarrhea, nausea, vision problems, a severe throbbing headache, sweating, stomach pain, cold or clammy skin, fainting, fast or pounding heartbeats or confusion. An overdose of Imdur can be fatal.

What should I do if I miss the dose?

If you miss the dose, try to take it as soon as you have the opportunity. If it is time for your next dose, take only one dose. You don’t have to double the dose.

Interactions may occur with:

  • a beta-blocker such as carvedilol (Coreg), atenolol (Tenoretic,Tenormin), metoprolol (Toprol, Lopressor), labetalol (Trandate, Normodyne), propranolol (InnoPran, Inderal), nadolol (Corgard), sotalol (Betapace), and others
  • blood pressure medication
  • a calcium channel blocker such as felodipine (Plendil), diltiazem (Cardizem, Cartia), verapamil (Covera, Calan, Verelan, Isoptin), nifedipine (Procardia, Nifedical), and others
  • an erectile dysfunction medication such as vardenafil (Levitra), tadalafil (Cialis)
  • dihydroergotamine (D.H.E. 45, Migranal) or ergotamine (Cafergot, Ergomar, and others)

This list of interactions may be not complete. Provide your medical practitioners entire list of medicines, herbs, dietary supplements or non-prescription drugs you take. Moreover tell them whether you drink alcohol, use illegal drugs or smoke. Particular items may interact with your drug.


Which side effects can I perceive from this remedy?

Contact your physician immediately if you notice any of the following

Sserious side effects:

  • allergy like difficulty breathing, skin rash, swelling of the tongue, lips or face, itching or hives
  • feeling like you might pass out
  • worsening angina pain
  • blue-colored skin, trouble breathing,  tired feeling
  • uneven heart rate

Less serious side effects:

  • stiffness or pain in muscles or joints
  • dry mouth
  • mild dizziness, headache
  • vomiting, diarrhea, nausea, constipation
  • redness, warmth, or tingling under your skin
  • hot flashes

This list of side effects may be not complete, others may occur. Inform your medical practitioners about all side effects you experience.

Where should I store this medicine?

Imdur should be stored at room temperature, between 15 and 30 degrees C (59 and 86 degrees F), in a tightly closed container. Protect from moisture, direct heat, and light. Do not store in the bathroom or near a sink. Keep Imdur out of the reach of children and away from animals.

Warning: Before taking the drug you need to consult your doctor. The information contained in this article is not intended to cover all possible precautions, drug interactions, adverse effects, directions, uses, allergic reactions or warnings.

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