Imdur 30mg & 60mg Tablets (Isosorbide Mononitrate) | Used to Treat & Prevent Heart-Related Chest Pain (Angina)
Imdur Tablet (Isosorbide) belongs to the group of organic nitrates with vasodilator activity. It is an oral extended-release medication used to prevent and manage angina pectoris (chest pain) in patients with heart disease. It works by relaxing and widening blood vessels, improving blood flow and reducing the heart’s workload.
Product Overview
Imdur is an extended-release medication available in 30 mg and 60 mg strengths, designed for the long-term management of heart-related chest pain. It is used to treat angina, a heart condition where blood vessels suddenly narrow, reducing blood flow to the heart and causing chest, neck, or arm pain. Imdur Tablet contains isosorbide mononitrate, a powerful vasodilator. By relaxing the smooth muscles within the vascular system, it ensures a steady supply of oxygen-rich blood to the heart muscle, preventing the onset of painful episodes.
Product Composition
- Active Ingredient: Isosorbide Mononitrate
- Strengths: 30 mg and 60 mg
- Dosage Form: Extended-Release (ER) Tablet
- Pharmacological Class: Nitrate Vasodilator
Product Specification
| Feature | Details |
| Brand Name | Imdur |
| Active Molecule | Isosorbide Mononitrate |
| Available Strengths | 30 mg, 60 mg |
| Primary Indication | Angina Pectoris Prophylaxis |
| Release Type | Controlled / Extended Release |
| Administration | Oral (Once Daily) |
Mechanism of Action
Imdur functions by facilitating the relaxation of blood vessels, which directly reduces the workload on the cardiovascular system.
- Nitric Oxide Release: Once absorbed, the medication releases nitric oxide, which stimulates the production of cyclic GMP, leading to the relaxation of vascular smooth muscle.
- Venous Dilation: It primarily dilates the peripheral veins, which reduces the volume of blood returning to the heart (preload), thereby lowering the pressure within the heart chambers.
- Arterial Dilation: To a lesser extent, it relaxes the arteries, reducing the resistance against which the heart must pump (afterload).
- Improved Oxygen Delivery: By dilating the coronary arteries, it enhances the flow of oxygenated blood to areas of the heart that are otherwise restricted during exertion.
- Extended-Release Delivery: The specialized matrix allows for a gradual release of the active molecule, providing 24-hour protection with a single dose.
Key Benefits
- Effective Angina Prevention: Specifically formulated to prevent the frequency and severity of angina attacks over a long-term period.
- Improved Exercise Tolerance: By optimizing blood flow, it allows patients to engage in daily physical activities with a reduced risk of chest pain.
- Once-Daily Convenience: The extended-release technology simplifies the treatment regimen, improving patient adherence compared to immediate-release versions.
- Reliable Blood Pressure Support: While primarily for angina, the vasodilatory effect helps maintain lower systemic vascular resistance.
- Reduced Cardiac Workload: By lowering preload and afterload, the heart requires less oxygen to function efficiently, protecting the heart muscle.
- Consistent Therapeutic Levels: The controlled-release mechanism avoids the "peaks and troughs" associated with regular tablets, providing a stable effect throughout the day.
Important Note
Imdur is a prophylactic treatment and is not intended for the immediate relief of an acute angina attack. If a sudden attack occurs, a fast-acting sublingual nitroglycerin should be used as directed.
Precautions
Using Imdur (Isosorbide Mononitrate) 30mg & 60mg safely requires attention to medical conditions, lifestyle factors, and proper usage guidelines.
General Safety Guidelines
- Take Imdur exactly as prescribed by your doctor.
- Do not stop suddenly without consulting your physician.
- Store tablets in a cool, dry place away from sunlight and moisture.
Medical Conditions to Consider
- Low blood pressure (hypotension): Use with caution, as Imdur may further lower blood pressure.
- Heart problems: Inform your doctor if you have heart failure, irregular heartbeat, or recent heart attack.
- Liver or kidney issues: Use cautiously and follow doctor recommendations.
- Allergies: Avoid if allergic to Isosorbide Mononitrate or any tablet components.
Pregnancy and Breastfeeding
- Use only under medical supervision if pregnant or breastfeeding. Safety data is limited.
Lifestyle and Usage Precautions
- Avoid alcohol while taking Imdur, as it may increase dizziness or low blood pressure.
- Do not take other nitrate medications simultaneously unless prescribed.
- Avoid sudden standing to prevent dizziness or fainting.
Additional Precaution Table
| Condition / Scenario | Suggested Action | Reason |
|---|---|---|
| Low blood pressure | Monitor BP regularly | Prevent hypotension-related complications |
| Heart conditions | Follow doctor's advice | Ensure safe use in heart failure or arrhythmias |
| Allergic reactions | Seek immediate medical attention | Prevent hypersensitivity reactions |
| Liver/Kidney issues | Periodic tests | Prevent accumulation or adverse effects |
| Lifestyle factors | Avoid alcohol, stay hydrated | Minimize dizziness and hypotension risk |
Usage
Imdur is designed for long-term oral administration. Consistent daily use is necessary to prevent angina attacks and maintain optimal cardiovascular function.
Dosage and Administration
Daily Schedule: Take the tablet once daily in the morning. Taking it at the same time every day ensures a consistent therapeutic effect.
Administration Method: Swallow the tablet whole with half a glass of water. Do not crush, chew, or break the tablet, as this would release the medicine too quickly and increase the risk of side effects.
With or Without Food: Imdur can be taken with or without food.
Tolerance Prevention: The dosing schedule is specifically designed to provide a period of low nitrate levels each day. This "nitrate-free interval" prevents your body from becoming used to the medicine, ensuring it stays effective.
Initial Dosing: A professional may start you on a lower dose (like 30 mg) and gradually increase it to 60 mg or more to minimize the risk of "nitrate headaches."
Missed Dose: Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed one and resume your normal schedule. Never take a double dose to make up for a missed one.
Standing Up Safely: To avoid dizziness or fainting, rise slowly from a sitting or lying position, especially when you first start taking this medication.
Storage and Handling
| Requirement | Instruction |
| Storage Temperature | Store below 30°C |
| Environmental Protection | Keep in a dry place, protected from moisture |
| Package Integrity | Keep tablets in the original blister pack until use |
| Safety | Keep out of reach and sight of children |
Uses
Imdur is primarily utilized for the preventative management of cardiovascular conditions involving restricted blood flow.
Prevention of Angina Pectoris: Used as a long-term maintenance therapy to prevent the occurrence of chest pain (angina) caused by coronary artery disease and not for treating an acute, ongoing, or sudden attack of chest pain, as it works too slowly.
Vasodilation: Acts as a powerful vasodilator that relaxes the smooth muscles of the blood vessels, allowing them to widen.
Reduction of Cardiac Preload: By dilating the veins, it reduces the volume of blood returning to the heart, which lowers the pressure and workload on the heart muscle.
Reduction of Cardiac Afterload: Helps relax the arteries, making it easier for the heart to pump blood throughout the body.
Oxygen Supply Optimization: Improves the delivery of oxygenated blood to the heart by dilating the coronary arteries, especially during physical activity.
Chronic Heart Failure Support: Sometimes used in combination with other medications to manage chronic heart failure by reducing the strain on the heart.
Improvement of Exercise Capacity: Enables patients with chronic heart conditions to engage in daily activities with a significantly reduced risk of chest, neck, or arm pain.
Side Effects
Imdur (Isosorbide Mononitrate) is generally well-tolerated, but some patients may experience mild to serious side effects. Monitoring these helps ensure safe and effective angina prevention.
Common Side Effects
- Headache – often mild and temporary
- Dizziness or lightheadedness
- Flushing or warmth of the skin
- Nausea
- Fatigue or weakness
Less Common Side Effects
- Palpitations or rapid heartbeat
- Blurred vision
- Mild hypotension (low blood pressure)
- Stomach upset or indigestion
Serious Side Effects and Warnings
| Side Effect | Recommended Action | Notes |
|---|---|---|
| Severe dizziness or fainting | Seek immediate medical attention | May indicate hypotension or excessive blood vessel relaxation |
| Chest pain worsening or irregular heartbeat | Contact your doctor immediately | Could signal heart complications |
| Allergic reactions (rash, swelling, difficulty breathing) | Seek emergency care | Rare but potentially life-threatening |
| Severe headache unrelieved by painkillers | Consult your doctor | May indicate intolerance or overdose |
| Persistent nausea, vomiting, or vision changes | Report to doctor | Could require dose adjustment or discontinuation |
Monitoring Tips While Using Imdur
- Take blood pressure readings regularly to avoid hypotension.
- Avoid sudden standing or rapid movement to prevent dizziness or fainting.
- Do not combine with other nitrates or PDE5 inhibitors without medical supervision.
- Report any unusual or severe symptoms promptly to your doctor.
FAQs
What is Imdur 30mg & 60mg used for?
Imdur is used to prevent and manage angina (chest pain) in patients with heart disease by improving blood flow by widening blood vessels and reducing the heart’s workload.
How should Imdur tablets be taken?
Take one tablet daily, at the same time each day, as prescribed by your doctor. Tablets can be taken with or without food.
Can I take Imdur with other medications?
Some medications, like sildenafil, tadalafil, antihypertensives, or other nitrates, can interact with Imdur. Always inform your doctor about all medications and supplements.
Can I drink alcohol while taking Imdur?
Alcohol may increase dizziness or low blood pressure while taking Imdur. It is recommended to limit or avoid alcohol.
How long does it take for Imdur to work?
Imdur provides long-acting prevention of angina. Its effect usually begins within 1–2 hours, but consistent daily use helps maintain stable heart protection.
Are there any side effects?
Common side effects include headache, dizziness, flushing, or lightheadedness. Serious side effects like severe hypotension or fainting require immediate medical attention.
Can Imdur be used in elderly patients?
Yes, but elderly patients should monitor blood pressure and heart rate closely due to a higher risk of dizziness or low blood pressure.
What should I do if I miss a dose?
Take the missed dose as soon as remembered. If it’s almost time for the next dose, skip the missed one—do not double the dose.
Interactions
Understanding drug interactions is essential while using Imdur (Isosorbide Mononitrate 30mg & 60mg) to ensure safe and effective treatment for angina and other cardiovascular conditions.
Common Drug Interactions
| Drug / Category | Interaction Effect | Recommended Action |
|---|---|---|
| Phosphodiesterase inhibitors (e.g., Sildenafil, Tadalafil) | May cause severe hypotension or fainting | Avoid concurrent use; consult your doctor |
| Antihypertensive medications (e.g., Beta-blockers, Calcium channel blockers) | May enhance blood pressure-lowering effects | Monitor blood pressure regularly |
| Other nitrate medications | Additive effect on lowering BP | Do not combine unless prescribed |
| Alcohol | Can intensify dizziness or low blood pressure | Limit or avoid alcohol consumption |
| Diuretics | May increase risk of hypotension | Monitor blood pressure and hydration |
Additional Notes on Interactions
- Avoid combining Imdur with other nitrate-containing drugs or medications affecting blood pressure without medical supervision.
- Inform your doctor about all prescription, OTC, and herbal supplements you are taking.
- Sudden dizziness, fainting, or unusual fatigue may indicate interaction—seek medical attention if these occur.
Lifestyle Considerations
- Monitor blood pressure and heart rate regularly.
- Avoid sudden standing or rapid position changes to prevent dizziness.
- Maintain consistent medication adherence to ensure effectiveness and reduce interaction risks.
| Manufacturer | : | AstraZeneca, India |
| Trade Name | : | Monoket |
| Generic Search | : | Isosorbide Mononitrate |
| Strength | : | 30mg, 60mg |
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