Imdur is in a group of drugs called nitrates. Imdur dilates (widens) blood vessels, making it easier for blood to flow through them and easier for the heart to pump. Imdur is used to prevent angina attacks (chest pain). Imdur will not treat an angina attack that has already begun. Imdur may also be used for purposes not listed in this medication guide.

Communicate to your doctor or pharmacist before taking Imdur 30 mg Tablet 30's if a patient has low performing thyroid gland, iundernourished because of a poor diet, has severe liver/kidney problems, suffers from hypothermia (very low body temperature), suffers from very poor blood circulation, has had any lethal damage to heart such as a heart attack or suffers from a disease called glaucoma (increased pressure in the eye).