PrescriptionGiant is a FREE prescription savings program that can save you up to 75% on your prescriptions with or without insurance!

Imdur (Generic Isosorbide)

Actual product appearance may differ slightly.

Click the CARD below to print or take a screenshot on your mobile phone or tablet. There is no need to download another app!


If you would like to personalize your card enter your full name in the member name field below the card at this link and click the Update button.

Why is this medication prescribed?

Imdur is prescribed primarily for the prevention and treatment of angina pectoris, a condition characterized by chest pain or discomfort caused by reduced blood flow to the heart muscle. It is specifically indicated for stable angina, which refers to angina that occurs predictably and is triggered by physical exertion or stress.

Imdur contains the active ingredient isosorbide mononitrate, which belongs to the class of medications known as nitrates. It works by relaxing and dilating the blood vessels, improving blood flow to the heart and reducing the workload on the heart.

The specific dosage and usage instructions for Imdur may vary depending on individual factors and the guidance of your healthcare provider. However, generally, Imdur is taken orally as an extended-release tablet, usually once daily in the morning. It is important to follow your doctor’s instructions and the directions on the prescription label.

How should this medicine be used?

To use Imdur properly:

  • Take Imdur exactly as prescribed by your doctor. Do not take more or less than the prescribed dose, and do not stop taking it without consulting your doctor.
  • Swallow the tablet whole with a glass of water. Do not crush, chew, or break the tablet, as it is designed to release the medication slowly over time.
  • Imdur is typically taken in the morning on an empty stomach, at least one hour before or two hours after a meal. However, follow your doctor’s instructions regarding the timing of your dose.
  • Avoid consuming alcohol while taking Imdur, as it can enhance the side effects of the medication.
  • If you miss a dose, take it as soon as you remember. However, if it is close to the time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not double the dose to make up for a missed one.

It’s important to note that Imdur is a long-acting medication intended for regular use. It is not used for the treatment of acute angina attacks. If you experience sudden or worsening chest pain, seek immediate medical attention, as it may indicate a more serious condition.

Other uses for this medicine

Imdur (isosorbide mononitrate) is primarily prescribed for the prevention and treatment of angina pectoris. However, it may also be used off-label for other conditions as determined by a healthcare professional. Off-label use refers to the use of a medication for a purpose not specifically approved by regulatory authorities. Some off-label uses of Imdur may include the treatment of congestive heart failure, esophageal spasms, and certain types of hypertension (high blood pressure).

What special precautions should I follow?

Regarding special precautions, it’s important to consider the following:

  • Allergies: Inform your healthcare provider if you have any known allergies to isosorbide mononitrate or other nitrates. This medication may contain inactive ingredients that could cause allergic reactions or other problems.
  • Medications and Interactions: Notify your doctor about all the medications you are taking, including prescription, over-the-counter, and herbal products. Certain medications, such as sildenafil (Viagra) and other phosphodiesterase inhibitors used for erectile dysfunction, can interact with Imdur and cause a dangerous drop in blood pressure.
  • Medical Conditions: Inform your doctor about any existing medical conditions you have, especially low blood pressure, recent heart attack, heart failure, liver disease, kidney disease, or a history of fainting. These conditions may affect the suitability and dosage of Imdur.
  • Pregnancy and Breastfeeding: If you are pregnant, planning to become pregnant, or breastfeeding, discuss the risks and benefits of using Imdur with your doctor. The safety of this medication during pregnancy or breastfeeding has not been well established.
  • Alcohol and Grapefruit: It is advisable to avoid consuming alcohol while taking Imdur, as it can increase the risk of side effects. Additionally, grapefruit or grapefruit juice may interact with Imdur and lead to potentially harmful effects. It is best to consult your doctor regarding the consumption of grapefruit products.
  • Hypotension: Imdur may cause a drop in blood pressure, leading to symptoms such as dizziness or lightheadedness. Use caution when rising from a sitting or lying position to minimize the risk of falls. If you experience severe or persistent low blood pressure, contact your healthcare provider.
  • Nitrate Tolerance: Prolonged use of Imdur may lead to the development of tolerance, reducing its effectiveness. Your doctor may prescribe a dosing schedule to minimize this effect.

It’s crucial to closely follow your doctor’s instructions, attend regular check-ups, and report any concerning symptoms or side effects while taking Imdur. They can provide personalized guidance based on your specific medical history and help ensure the safe and effective use of the medication.

What special dietary instructions should I follow?

There are no specific dietary restrictions for Imdur. However, it’s generally recommended to follow a healthy, balanced diet that is low in saturated and trans fats, cholesterol, and sodium. This can help reduce the risk of cardiovascular problems and support the effectiveness of your medication. It’s also important to discuss your dietary habits with your healthcare provider for personalized advice.

What should I do if I forget a dose?

If you forget to take a dose of Imdur, take it as soon as you remember, unless it is close to the time for your next scheduled dose. In that case, skip the missed dose and continue with your regular dosing schedule. Do not double the dose to make up for the missed one. Taking more than the prescribed dose can increase the risk of side effects.

What side effects can this medication cause?

Imdur is a medication that contains the active ingredient isosorbide mononitrate, which belongs to a class of drugs called nitrate vasodilators. It is primarily used to prevent angina (chest pain) in individuals with coronary artery disease. While Imdur is generally well-tolerated, it can cause some side effects. The most common side effects of Imdur include:

  • Headache: This is the most frequently reported side effect and is often a result of the medication’s blood vessel-dilating effects.
  • Dizziness or lightheadedness: Imdur can cause a drop in blood pressure, leading to feelings of dizziness or lightheadedness, especially when standing up quickly.
  • Flushing: Some individuals may experience flushing or redness of the skin, often affecting the face and neck.
  • Nausea or vomiting: These gastrointestinal symptoms can occur but are relatively uncommon.
  • Weakness or fatigue: Imdur may cause a general sense of tiredness or weakness, although this side effect is less common.
  • Low blood pressure: In some cases, Imdur can cause a drop in blood pressure, which may lead to symptoms such as lightheadedness, fainting, or blurred vision.
  • Increased heart rate: Imdur can occasionally cause a rapid or irregular heartbeat, although this is rare.
  • Allergic reactions: While rare, some individuals may experience allergic reactions to Imdur, characterized by symptoms such as rash, itching, swelling, or difficulty breathing. It is important to seek immediate medical attention if any signs of an allergic reaction occur.

It’s important to note that these are not the only possible side effects of Imdur. Some individuals may experience other, less common side effects. If you are taking Imdur and have concerns about its side effects, or if you experience any unusual or severe symptoms, it is best to consult your doctor for advice. They can provide personalized information based on your medical history and current health condition.

What should I know about storage and disposal of this medication?

Here’s what you should know about the storage and disposal of IMDUR:

  • Storage: IMDUR should be stored at room temperature, away from moisture, heat, and light. Follow the storage instructions provided on the medication packaging or as directed by your healthcare provider.
  • Keep it out of reach of children and pets: IMDUR should be stored in a secure location, out of the reach of children and pets, to prevent accidental ingestion.
  • Do not transfer tablets to another container: Keep IMDUR in its original container to ensure proper identification and to protect it from exposure to moisture or air.
  • Dispose of expired or unused medication: If you have expired or unused IMDUR tablets, do not flush them down the toilet or throw them in the trash. Properly dispose of them following your local regulations for medication disposal. You can consult your pharmacist or local waste management authorities for guidance on safe disposal methods.

In case of emergency/overdose

  • Seek immediate medical help: If you suspect an overdose or experience severe symptoms, call emergency services or go to the nearest emergency room right away.
  • Do not induce vomiting: Unless specifically instructed to do so by medical professionals, do not induce vomiting unless directed to do so.
  • Provide information to healthcare providers: In case of an emergency, it’s important to provide healthcare providers with information about the medication you have taken, including the name (Imdur) and the dosage.

What other information should I know?

  • Imdur should be taken exactly as prescribed by your healthcare provider. Follow the instructions on the prescription label or the patient information leaflet.
  • It is essential to inform your doctor about any other medications, supplements, or herbal products you are taking, as they may interact with Imdur and cause adverse effects.
  • Avoid consuming alcohol while taking Imdur, as it may enhance the dizziness or lightheadedness caused by the medication.
  • Inform your doctor if you have a history of low blood pressure, liver or kidney disease, or congestive heart failure.
  • Do not abruptly stop taking Imdur without consulting your doctor, as this could lead to a worsening of angina symptoms.

Remember, this information is a general overview, and it’s important to consult your healthcare provider or pharmacist for specific instructions and guidance regarding the storage, disposal, and emergency procedures related to Imdur.

Copyright © 2023