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ISOSORBIDE MONONITRATE (Oral) (Tablet) Drug and Prescription Information


ISOSORBIDE MONONITRATE (Oral) (Tablet) Medication Classification


ISOSORBIDE MONONITRATE (Oral) (Tablet) Brandname

Imdur, Monoket, Ismo

ISOSORBIDE MONONITRATE (Oral) (Tablet) is used for the Treatment

Isosorbide Mononitrate (EYE-so-sor-bide mon-oh-NI-trate) Prevents angina (chest pain). This medicine is a nitrate.

When To Not Use ISOSORBIDE MONONITRATE (Oral) (Tablet)

You should not use this medicine if you have had an allergic reaction to isosorbide or similar medicines (such as nitroglycerin or Isordil®). You should not use this medicine if you are also using Viagra®.

How Should You Use ISOSORBIDE MONONITRATE (Oral) (Tablet)

Tablet, Long Acting Tablet

  • Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to.
  • Take this medicine exactly as directed, or it will not work properly. Most people use this medicine for only part of each day.
  • It is best to take this medicine on an empty stomach with at least half a glass of water.
  • Swallow the extended-release tablet whole. Do not break, crush, or chew it.
  • Never share your medicine with anyone.
  • If a dose is missed:
  • If you miss a dose or forget to use your medicine, use it as soon as you can. If your next regular dose is less than 2 hours away, wait until then to use the medicine and skip the missed dose.
  • Do not use extra medicine to make up for a missed dose.

Proper ISOSORBIDE MONONITRATE (Oral) (Tablet) Storage

Store ISOSORBIDE MONONITRATE (Oral) (Tablet) at room temperature away from sunlight and moisture unless otherwise stated by manufacturer's instructions or labelling. Keep ISOSORBIDE MONONITRATE (Oral) (Tablet) and all medications out of the reach of children.

What To Avoid While Using ISOSORBIDE MONONITRATE (Oral) (Tablet)

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are also using diuretics or "water pills" (such as furosemide, hydrochlorothiazide, Hyzaar®), or heart or blood pressure medicine (such as verapamil, Adalat®, Calan®, Cardizem®, Lotrel®, Plendil®, Procardia®, Tiazac®).
  • Do not drink alcohol while you are using this medicine.


  • Make sure your doctor knows if you are pregnant or breastfeeding, or if you have low blood pressure, congestive heart failure (CHF), an enlarged heart, or other heart problems.
  • Medicines that treat chest pain sometimes cause headaches. These headaches are a sign that the medicine is working. Do not stop taking the medicine or change the time you take it in order to avoid the headaches. You may take aspirin or Tylenol® to relieve the headache. If you have severe pain, talk with your doctor.
  • This medicine may make you dizzy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert. You may feel lightheaded when standing, so stand up slowly.
  • Do not stop using this medicine suddenly without asking your doctor. You may need to slowly decrease your dose before stopping it completely.

ISOSORBIDE MONONITRATE (Oral) (Tablet) Side Effects

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in face or hands, swelling or tingling in the mouth or throat, tightness in chest, trouble breathing
  • Blue lips or fingernails, trouble breathing
  • Severe or ongoing dizziness, lightheadedness, or fainting
  • Slow heartbeat, increased chest pain
  • Throbbing, severe, or ongoing headache, confusion, low fever, or trouble seeing
  • If you notice these less serious side effects, talk with your doctor:
  • Nausea, vomiting
  • Sweating, facial flushing


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