Imdur (Isosorbide Mononitrate) Side Effects, Before Taking & More

Imdur (isosorbide mononitrate) belongs to a group of drugs called nitrates. Isosorbide mononitrate dilates (widens) blood vessels, making it easier for blood to flow through them and easier for the heart to pump.

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Imdur is used to prevent angina attacks (chest pain). Imdur will not treat an angina attack that has already begun.

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