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Isordil Side Effects Center

Pharmacy Editor: Charles Patrick Davis, MD, PhD

Last reviewed on RxList 7/2/2015

Isordil (isosorbide dinitrate) is a nitrate indicated for the prevention of angina due to coronary artery disease and congestive heart failure. Isordil is available as a generic termed isosorbide dinitrate. Common side effects of Isordil include headache, weakness, mild dizziness, and skin changes such as redness, tingling or warmth.

Isordil (isosorbide dinitrate) tablets come in strengths of 5 or 40 mg of isosorbide dinitrate. Doses it titrated to effectiveness. Serious side effects include heart rate changes, increased angina, syncopy or near-syncopy, nausea and vomiting, sweating, pale skin, blurry vision and shortness of breath. Do not take this drug with Viagra; life-threatening side effects may occur. It is not known if Isordil affects the fetus in pregnant women or if it occurs in breast milk. Safety and effectiveness of Isordil in pediatric patients have not been established.

Our Isordil Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Isordil in Detail - Patient Information: Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • fast, slow, pounding, or uneven heart rate;
  • worsening angina pain;
  • blurred vision or dry mouth;
  • nausea, vomiting, sweating, pale skin, feeling like you might pass out; or
  • blue-colored skin, tiredness, and feeling short of breath.

Less serious side effects may be more likely to occur, such as:

  • headache, mild dizziness;
  • weakness; or
  • warmth, redness, or tingly feeling under your skin.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Isordil (Isosorbide Dinitrate)

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Isordil FDA Prescribing Information: Side Effects
(Adverse Reactions)


Adverse reactions to isosorbide dinitrate are generally dose-related, and almost all of these reactions are the result of isosorbide dinitrate's activity as a vasodilator. Headache, which may be severe, is the most commonly reported side effect. Headache may be recurrent with each daily dose, especially at higher doses. Transient episodes of lightheadedness, occasionally related to blood pressure changes, may also occur. Hypotension occurs infrequently, but in some patients it may be severe enough to warrant discontinuation of therapy. Syncope, crescendo angina, and rebound hypertension have been reported but are uncommon.

Extremely rarely, ordinary doses of organic nitrates have caused methemoglobinemia in normal-seeming patients. Methemoglobinemia is so infrequent at these doses that further discussion of its diagnosis and treatment is deferred (see OVERDOSAGE).

Data are not available to allow estimation of the frequency of adverse reactions during treatment with Isordil Titradose tablets.

Read the entire FDA prescribing information for Isordil (Isosorbide Dinitrate)

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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