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Imdur is the brand name for isosorbide mononitrate and is available as an extended-release tablet.

Imdur is available as a 30 mg, 60 mg, and 120 mg extended release tablet.

Imdur is a nitrate vasodilator and is used to treat angina (a specific type of chest pain) caused by heart disease.

Imdur is a nitrate vasodilator. It helps relax your blood vessels. This makes it easier for your heart to pump, relieving heart-related chest pain.

Imdur is typically dosed as 30 mg or 60 mg by mouth once daily in the morning. It can be increased up to a maximum of 240 mg once daily.

Imdur is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication if you have a hypersensitivity or idiosyncratic reactions to other nitrates or nitrites.

Common side effects of Imdur include:

• Headache
• Dizziness

Serious side effects are rare with Imdur. Contact your healthcare provider immediately if you experience any of the following:

• Overdose: confusion, blurred vision or changes in vision, heart palpitations, feeling like you’re going to pass out (especially when standing up)

The following medications may interact with Imdur:

• The vasodilating effects of isosorbide mononitrate may be additive with those of other vasodilators. Alcohol, in particular, has been found to exhibit additive effects of this variety
• Marked symptomatic orthostatic hypotension has been reported when calcium channel blockers and organic nitrates were used in combination. Dose adjustments of either class of agents may be necessary

Merck & Co., Inc.

It is not known if Imdur will harm your unborn baby. You should talk to your healthcare provider before taking this medication if you are pregnant.

• Isosorbide Mononitrate