Imdur (Isosorbide Mononitrate) Dosage and Side Effects
IMDUR is used to prevent severe chest pain and feeling of pressure around the heart (recurring angina pectoris).
Proper Use of this medication
It is important to take IMDUR at about the same time every day.
If you miss a dose of IMDUR and remember within 6 hours, take your usual dose as soon as possible. Then go back to your regular schedule. But if it is more than 6 hours when you remember, do not take the missed dose. Just take the next dose on time.
Never take a double dose of IMDUR to make up for missed tablets. If you are still unsure, check with your doctor or pharmacist to see what you should do.
IMDUR, like any medication, may produce side effects.
The most common side effect is headache. It often occurs at the beginning of the treatment, but usually goes away after a few days. If you get a bad headache, and it becomes a problem, be sure to tell your doctor.
If too much IMDUR is taken, a severe pulsing headache might occur. You may feel lightheaded, dizzy, excited, flushed, have cold sweats, nausea (feeling sick) and vomiting. If any of these symptoms occur, lie down with your feet raised and get someone to call your doctor right away.
Some people feel IMDUR makes them dizzy, faint, or tired. This is more likely when IMDUR is first started. If you have any of these effects, please tell your doctor.
Do not stop taking IMDUR until your doctor tells you. He or she may want to reduce your dose slowly.
Remember, medicines affect different people in different ways. Just because other people have had side effects does not mean you will get them. Discuss how you feel on IMDUR with your doctor or pharmacist.
Other side effects which cannot be predicted may occur in rare cases. If you have any bothersome or unusual effects while using IMDUR, check with your doctor of pharmacist right away.
Warnings and Precautions
Be sure you’ve told your doctor:
- about all health problems you have now, and have had in the past;
- about all other medicines you take, including any you take for high blood pressure, and ones you can buy without a prescription;
- if you are pregnant, plan to become pregnant, or are breast-feeding;
- if you have ever had an allergic, bad or unusual reaction to nitrates or to any medicine for heart problems;
- if you are allergic to nonmedicinal substances like food products, preservatives, or dyes, which may be present in IMDUR
Interactions with this medication
If you are taking IMDUR, you must not take phosphodiesterase type 5 inhibitors (i.e. Viagra (sildenafil), Cialis (tadalafil), Levitra (vardenafil)). Such a combination can produce severe lowering of blood pressure, loss of consciousness, heart attack, or death.
Unused medicines which you know you will no longer need should be carefully discarded. Small quantities may be disposed of in the toilet or you may wish to seek advice from your pharmacist.