Medically reviewed on Sep 5, 2018
The Ismo brand name has been discontinued in the U.S. If generic versions of this product have been approved by the FDA, there may be generic equivalents available.
Uses of ISMO:
- It is used to prevent chest pain.
- It may be given to you for other reasons. Talk with the doctor.
What do I need to tell my doctor BEFORE I take ISMO?
- If you have an allergy to isosorbide mononitrate or any other part of ISMO (isosorbide mononitrate tablets).
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- If you are taking any of these drugs: Avanafil, riociguat, sildenafil, tadalafil, or vardenafil.
This is not a list of all drugs or health problems that interact with ISMO (isosorbide mononitrate tablets).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take ISMO (isosorbide mononitrate tablets) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take ISMO?
- Tell all of your health care providers that you take ISMO (isosorbide mononitrate tablets). This includes your doctors, nurses, pharmacists, and dentists.
- Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how ISMO (isosorbide mononitrate tablets) affects you.
- To lower the chance of feeling dizzy or passing out, rise slowly if you have been sitting or lying down. Be careful going up and down stairs.
- Have your blood pressure checked often. Talk with your doctor.
- This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take ISMO (isosorbide mononitrate tablets).
- Talk with your doctor before you drink alcohol.
- If you are taking ISMO (isosorbide mononitrate tablets) for chest pain, it will not treat chest pain as it happens. This medicine is only used to prevent or lower the number of chest pain attacks.
- If you have been taking ISMO (isosorbide mononitrate tablets) for a long time without a break, it may not work as well. This is known as tolerance. Be sure to have a "nitrate-free" period of time each day. Talk with your doctor if ISMO (isosorbide mononitrate tablets) stops working well. Do not take more than ordered.
- If you are 65 or older, use ISMO (isosorbide mononitrate tablets) with care. You could have more side effects.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using ISMO (isosorbide mononitrate tablets) while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
How is this medicine (ISMO) best taken?
Use ISMO (isosorbide mononitrate tablets) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Do not stop taking ISMO (isosorbide mononitrate tablets) all of a sudden without calling your doctor. You may have a greater risk of side effects. If you need to stop ISMO (isosorbide mononitrate tablets), you will want to slowly stop it as ordered by your doctor.
What do I do if I miss a dose?
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Chest pain or pressure lasting more than 15 minutes. Get emergency medical care right away.
- Very bad dizziness or passing out.
- Fast or slow heartbeat.
What are some other side effects of ISMO?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- You may have headaches when you start taking ISMO (isosorbide mononitrate tablets). Most of the time it gets better with time. Do not change how you use ISMO (isosorbide mononitrate tablets) to avoid these headaches. Talk with your doctor for ways to lessen this side effect.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out ISMO?
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about ISMO (isosorbide mononitrate tablets), please talk with your doctor, nurse, pharmacist, or other health care provider.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about Ismo (isosorbide mononitrate)
- Ismo Side Effects
- During Pregnancy
- Dosage Information
- Drug Images
- Drug Interactions
- Drug class: antianginal agents