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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 methemo- globinemia 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® (isosorbide dinitrate) tablets.
Read the Isordil (isosorbide dinitrate) Side Effects Center for a complete guide to possible side effects
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Last reviewed on RxList: 5/6/2008
This monograph has been modified to include the generic and brand name in many instances.
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