Ismo Retard Tablet ER: Complete Medicine Guide
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026
When to Call Your Doctor IMMEDIATELY
- Severe dizziness or fainting
- Chest pain that is different from usual angina or lasts longer than 15 minutes
- Difficulty breathing or shortness of breath
- Bluish discoloration of lips, skin, or nails
- Swelling of the face, lips, tongue, or throat
- Very slow or very fast heartbeat
- Sudden severe headache with vision changes
- Confusion or unusual weakness
If experiencing severe symptoms, call emergency services immediately.
What is ismo retard tablet er used for?
This medicine is an extended-release tablet containing Isosorbide Mononitrate 40 mg. It is used to prevent angina attacks in people with coronary artery disease. It works by relaxing blood vessels, reducing the heart's workload, and improving blood flow to the heart. It is not for immediate relief of an acute angina attack. Take it once daily as prescribed, swallow it whole, and do not stop it suddenly without consulting your doctor.
- Generic Name: Isosorbide Mononitrate (40mg)
- Manufacturer: Abbott
- Form: Allopathy
- Pregnancy Category: Consult doctor
- Prescription Required: Yes
🇮🇳 ismo retard tablet er के बारे में (Hindi Summary)
उपयोग: यह दवा मुख्य रूप से एंजाइना पेक्टोरिस (सीने में दर्द) को रोकने के लिए इस्तेमाल की जाती है। यह कोरोनरी धमनी रोग वाले मरीजों में दिल के दौरे से बचाव में मदद करती है। यह रक्त वाहिकाओं को फैलाकर दिल पर दबाव कम करती है और दिल तक ऑक्सीजन की आपूर्ति बढ़ाती है। यह दवा तीव्र एंजाइना हमले के इलाज के लिए नहीं है, बल्कि इससे बचाव के लिए है। इसे डॉक्टर की सलाह के अनुसार रोज एक बार लें। गोली को चबाएं या तोड़ें नहीं, पूरा निगलें। शराब के साथ इसका सेवन न करें। अचानक दवा बंद न करें।
साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में सिरदर्द, चक्कर आना, चेहरे पर गर्मी लगना और ब्लड प्रेशर कम होना शामिल हैं। सिरदर्द शुरुआत में आम है और धीरे-धीरे कम हो जाता है। कुछ मरीजों को मतली, उल्टी, धड़कन तेज होना या बेहोशी भी हो सकती है। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन अगर आपको बहुत ज्यादा चक्कर आए, बेहोशी हो, सांस लेने में तकलीफ हो, या चेहरे, होंठ या गले में सूजन आए, तो तुरंत डॉक्टर से मिलें।
सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें। आमतौर पर इसे सुबह एक बार लिया जाता है। गोली को पानी के साथ पूरा निगलें, चबाएं या तोड़ें नहीं। सिल्डेनाफिल, टैडालाफिल या वार्डेनाफिल जैसी दवाओं के साथ इसका सेवन बिल्कुल न करें, क्योंकि इससे ब्लड प्रेशर खतरनाक रूप से कम हो सकता है। शराब से बचें। बैठने या लेटने से उठते समय धीरे-धीरे उठें। डॉक्टर की सलाह के बिना दवा अचानक बंद न करें। नियमित रूप से ब्लड प्रेशर और दिल की जांच कराते रहें।
💊 ismo retard tablet er Uses & Benefits
- [{"condition":"Chronic stable angina pectoris","description":"This medicine is used for long-term prevention of angina attacks in patients with coronary artery disease.
- It reduces the frequency and severity of chest pain by decreasing cardiac workload and improving coronary blood flow.","evidence":"Well-established"},{"condition":"Angina prophylaxis in patients with ischemic heart disease","description":"This medicine helps prevent exercise-induced and stress-induced angina when taken regularly.
- It is not intended for immediate relief of an acute attack.","evidence":"Well-established"},{"condition":"Adjunctive therapy in chronic heart failure","description":"In selected patients with chronic heart failure, nitrate therapy may be used as part of a broader treatment plan under specialist supervision.
- It is not a first-line treatment for heart failure.","evidence":"Limited"}]
Off-label uses: [{"condition":"Esophageal spasm","description":"Nitrates may be used off-label to relax esophageal smooth muscle in patients with spastic esophageal disorders, but this is not a standard first-line use.","evidence":"Limited"},{"condition":"Raynaud's phenomenon","description":"Occasionally used off-label for vasospastic conditions such as Raynaud's phenomenon, though evidence is limited and other treatments are preferred.","evidence":"Limited"}]
Primary treatment for: Chronic stable angina pectoris
Also treats: Ischemic heart disease, Chronic heart failure (adjunctive)
📋 Drug Information
| Generic Name(s) | Isosorbide Mononitrate (40mg) |
| Brand Name | ismo retard tablet er |
| Manufacturer | Abbott |
| Packaging / Form | Varies by brand (Allopathy) |
| Therapeutic Class | CARDIAC |
| Action Class | NO Donors |
| Route of Administration | Oral |
| Storage | Store this medicine at room temperature between 15°C and 30°C (59°F and 86°F). Keep it away from moisture, heat, and direct sunlight. Do not store it in the bathroom. Keep it in the original container, tightly closed. Keep out of reach of children and pets. |
| Shelf Life | The shelf life of this medicine is typically 24 months from the date of manufacture, but it may vary. Check the expiry date on the packaging. Do not use it after the expiry date. |
| WHO Guideline | Not established from the available information. |
| ICMR Guideline | Not established from the available information. |
👨⚕️ Doctor's Practical Tips
Evidence-based practical advice from experienced clinicians
🔍 Is This Medicine Right for Your Symptom?
Educational reference. Always consult a doctor for diagnosis.
🔬 How This Medicine Works (Pharmacology)
Pharmacokinetics
How It Works
This medicine works by releasing nitric oxide, which activates guanylate cyclase in vascular smooth muscle cells. This leads to increased cyclic guanosine monophosphate, relaxation of smooth muscle, and vasodilation. The result is reduced preload and afterload on the heart, decreased myocardial oxygen demand, and improved coronary blood flow. The extended-release formulation provides a prolonged effect while allowing a nitrate-free interval to reduce tolerance.
Mechanism Steps
💡 How to Take ismo retard tablet er
Strength: Extended-release tablet, 40 mg
Dosage Information
| Adult Dosage | The usual adult dose of this medicine is one 40 mg extended-release tablet taken orally once daily, preferably in the morning. The dose may be adjusted by your doctor based on your response and tolerance. A nitrate-free interval of 10 to 12 hours is recommended to prevent tolerance. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not crush, chew, or split the tablet. Swallow it whole with water. |
| Pediatric Dosage | Pediatric dosing is not established from available information. Consult a pediatrician. |
| Elderly Dosage | Elderly patients may be more sensitive to the blood pressure-lowering effects of this medicine. Start with a lower dose and monitor blood pressure closely. Dose must be individualized by a qualified clinician based on renal and hepatic function and overall health status. |
| Renal Impairment | No specific dose adjustment is established for patients with mild to moderate renal impairment. In severe renal impairment, this medicine should be used with caution and the dose may need to be reduced. Consult your doctor for individualized dosing. |
| Hepatic Impairment | No specific dose adjustment is established for patients with mild to moderate hepatic impairment. In severe hepatic impairment, this medicine should be used with caution and the dose may need to be reduced. Consult your doctor for individualized dosing. |
| Maximum Daily Dose | The maximum recommended daily dose of this medicine is 40 mg to 120 mg once daily, depending on the formulation and clinical response. For this 40 mg extended-release tablet, the maximum daily dose is typically 40 mg to 80 mg once daily, but it must be individualized by a qualified clinician. Do not exceed the dose prescribed by your doctor. |
Dosage Timeline
🍽️ Food Timing Guide
⏰ What to Do If You Miss a Dose
⚠️ Side Effects of ismo retard tablet er
✅ Common Side Effects
🚨 Serious Side Effects
⚠️ Rare Side Effects
Consult your doctor if you experience any unusual symptoms.
🔬 Drug Interactions
| Drug | Severity | Effect |
|---|---|---|
| Sildenafil | Major | |
| Tadalafil | Major | |
| Vardenafil | Major | |
| Riociguat | Major | |
| Alcohol | Major | |
| Beta-blockers | Moderate | |
| Calcium channel blockers | Moderate | |
| Tricyclic antidepressants | Moderate | |
| Ergot alkaloids | Moderate | |
| NSAIDs | Minor |
🚨 Major Interactions
- Phosphodiesterase-5 inhibitors (sildenafil, tadalafil, vardenafil)
- Riociguat
- Alcohol
⚡ Moderate Interactions
- Antihypertensive drugs (beta-blockers, calcium channel blockers, ACE inhibitors, ARBs, diuretics)
- Tricyclic antidepressants
- Ergot alkaloids
🍷 Alcohol Interaction
Alcohol should be avoided while taking this medicine. Alcohol can increase the blood pressure-lowering effect of nitrates, leading to severe dizziness, fainting, and falls. It can also worsen headache and flushing. If you consume alcohol, discuss safe limits with your doctor.
🔎 Check Your Other Medicines
Educational tool. Always confirm with your doctor or pharmacist.
🛡️ Safety & Warnings
🚫 Contraindications
["Known hypersensitivity or allergy to isosorbide mononitrate or other nitrates","Concurrent use of phosphodiesterase-5 inhibitors such as sildenafil, tadalafil, or vardenafil","Concurrent use of riociguat","Severe hypotension (systolic blood pressure less than 90 mmHg)","Severe anemia","Increased intracranial pressure","Acute heart failure with low filling pressures","Cardiogenic shock","Constrictive pericarditis","Hypertrophic obstructive cardiomyopathy"]
⚠️ Warnings & Precautions
["This medicine may cause severe hypotension, especially when starting treatment or increasing the dose. Rise slowly from sitting or lying positions.","Do not use this medicine to relieve an acute angina attack. It is for prevention only.","Tolerance to the effects of this medicine can develop with continuous use. A nitrate-free interval of 10 to 12 hours is recommended.","Avoid alcohol while taking this medicine, as it can increase dizziness and low blood pressure.","Do not stop this medicine suddenly without consulting your doctor, as this can worsen angina.","Use with caution in patients with glaucoma, as nitrates may increase intraocular pressure.","Use with caution in patients with severe liver or kidney disease.","Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding.","Keep this medicine out of reach of children.","Do not share this medicine with others, even if they have similar symptoms."]
🤱 Lactation Safety
It is not known whether isosorbide mononitrate is excreted in human breast milk. Because many drugs are excreted in human milk, caution should be exercised when this medicine is administered to a breastfeeding woman. Consult your doctor before breastfeeding while taking this medicine.
💊 Overdose Management
Overdose of this medicine can cause severe hypotension, throbbing headache, dizziness, palpitations, visual disturbances, and methemoglobinemia. If you suspect an overdose, seek emergency medical attention immediately. Treatment is supportive and may include intravenous fluids, vasopressors, and methylene blue for methemoglobinemia. Do not try to treat yourself at home.
⏰ Missed Dose
If you miss a dose of this medicine, take it as soon as you remember, unless it is almost time for your next dose. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one. If you are unsure, consult your doctor or pharmacist.
Additional Safety Advice
Take this medicine exactly as prescribed by your doctor, usually once daily in the morning. Swallow the extended-release tablet whole with a glass of water; do not crush, chew, or split it. Do not take this medicine with phosphodiesterase-5 inhibitors such as sildenafil, tadalafil, or vardenafil, because the combination can cause a dangerous drop in blood pressure. Avoid alcohol while taking this medicine, as it can increase dizziness and low blood pressure. Rise slowly from sitting or lying positions to prevent falls. Do not stop this medicine suddenly without consulting your doctor, because sudden withdrawal can worsen angina. Keep all follow-up appointments and report any new or worsening symptoms. Store this medicine at room temperature away from moisture and heat. Keep it out of reach of children. If you miss a dose, follow your doctor's instructions; do not double the dose. Inform all healthcare providers, including dentists, that you are taking this medicine.
👴 Special Considerations for Elderly
💡 For Patients Above 65
Elderly patients may be more sensitive to the blood pressure-lowering effects of this medicine. They are at higher risk of dizziness, falls, and fainting. Start with a lower dose and monitor blood pressure closely. Ensure adequate hydration and advise rising slowly from sitting or lying positions. Regular follow-up is important to adjust the dose as needed.
🤰 Pregnancy Planning (TTC)
If you are planning to become pregnant, consult your doctor before taking this medicine. The use of this medicine during pregnancy should be considered only if clearly needed. Your doctor may switch you to a safer alternative if appropriate. Do not start or stop any medicine without medical advice.
🏥 Post-Surgery Considerations
Inform your surgeon and anesthesiologist that you are taking this medicine before any surgery. It may interact with anesthetic agents and cause low blood pressure during surgery. Your doctor may advise you to stop the medicine temporarily before surgery. Do not stop it on your own without consulting your doctor.
🦷 Dental Procedures
Inform your dentist that you are taking this medicine before any dental procedure. It may cause dizziness or low blood pressure during dental work. Your dentist may take precautions such as monitoring your blood pressure. Do not stop the medicine without consulting your doctor.
💚 Lifestyle Tips for Better Results
🏋️ Exercise Considerations
You can exercise while taking this medicine, but avoid sudden strenuous activity, especially in hot weather, as it can increase the risk of dizziness and low blood pressure. Warm up gradually and cool down slowly. If you experience chest pain, dizziness, or shortness of breath during exercise, stop immediately and seek medical attention. Consult your doctor before starting any new exercise program.
🥗 Diet Recommendations
💼 Impact on Daily Work & Life
This medicine may cause dizziness or lightheadedness, especially when you first start taking it or when the dose is increased. Avoid driving or operating heavy machinery until you know how this medicine affects you. If you feel dizzy, sit or lie down until the feeling passes. Most people can continue their normal daily activities with appropriate precautions. Inform your employer if your job involves operating machinery or driving.
🛑 When to Stop This Medicine
Do not stop taking this medicine without consulting your doctor. If you experience severe side effects such as fainting, severe dizziness, or allergic reactions, seek immediate medical attention. Your doctor may adjust the dose or switch you to a different medicine if needed. Sudden withdrawal can cause worsening angina or a heart attack.
📅 Long-Term Use Effects
Long-term use of this medicine can lead to tolerance, where the effect diminishes over time. To prevent this, a nitrate-free interval of 10 to 12 hours is recommended. Regular monitoring of blood pressure, heart rate, and angina frequency is important. Long-term use does not cause kidney or liver damage in most patients, but periodic monitoring may be advised if you have pre-existing kidney or liver disease. Do not stop the medicine suddenly, as this can worsen angina.
🌿 Non-Medicine Approaches
These can complement medicine but do not replace prescribed treatment.
Another class of medicines used for angina prophylaxis. They reduce heart rate and blood pressure, decreasing myocardial oxygen demand.
Evidence: Well-establishedThese medicines relax blood vessels and reduce heart rate, helping prevent angina attacks.
Evidence: Well-establishedA different class of anti-anginal medicine used when other treatments are not effective or not tolerated.
Evidence: Well-establishedRegular exercise, heart-healthy diet, smoking cessation, and stress management can complement medical therapy.
Evidence: Well-established💉 Vaccination Considerations
💉 If You're Getting Vaccinated
There are no known interactions between this medicine and vaccines. However, if you are scheduled for vaccination, inform your healthcare provider about all medicines you are taking. Continue taking this medicine as prescribed unless your doctor advises otherwise.
📦 Storage Guide
✅ DO
Store at room temperature (15-30°C)
❌ DON'T
Do not refrigerate unless specified
✅ DO
Keep in original container
❌ DON'T
Do not transfer to unmarked containers
✅ DO
Keep away from direct sunlight
❌ DON'T
Do not store in bathroom cabinet
✅ DO
Keep out of reach of children
❌ DON'T
Do not use after expiry date
✈️ Traveling with This Medicine
When traveling, carry this medicine in its original packaging with the prescription label clearly visible. Bring a copy of your prescription or a letter from your doctor, especially for international travel. Keep the medicine in your carry-on luggage to avoid loss or temperature extremes. Store it at room temperature and away from direct sunlight. If crossing time zones, consult your doctor about how to adjust the timing of your dose. Do not pack it in checked baggage. Check customs regulations for your destination regarding prescription medicines.
💰 Cost Analysis & Savings
👥 Real Patient Stories
Educational, anonymized scenarios. Individual results may vary.
💬 Questions Patients Often Ask
A: This medicine starts working within 30 to 60 minutes after taking a dose, but its full preventive effect may take several days to develop. It is not for immediate relief of an acute angina attack.
A: No. This medicine is for prevention of angina attacks. For immediate relief of an acute attack, use fast-acting nitroglycerin as prescribed by your doctor.
A: Common side effects include headache, dizziness, flushing, and lightheadedness. These often improve with continued use. Consult your doctor if they persist or are severe.
A: It is best to avoid alcohol while taking this medicine, as it can increase dizziness and low blood pressure.
A: No. Combining this medicine with sildenafil, tadalafil, or vardenafil can cause a dangerous drop in blood pressure. This combination is contraindicated.
A: If you miss a dose, take it as soon as you remember, unless it is almost time for your next dose. If it is almost time, skip the missed dose and continue with your regular schedule. Do not double the dose.
A: No. Stopping this medicine suddenly can worsen angina. Always consult your doctor before stopping or changing the dose.
A: The use of this medicine during pregnancy should be considered only if clearly needed. Consult your obstetrician before using it.
🤔 Common Patient Concerns
🔄 Substitutes for ismo retard tablet er
View AllAlternative brands with exact same active ingredient:
-
nitrofix 40mg tabletMicro Labs Ltd ₹23.70 83.7% CHEAPER
-
monopark 40mg tabletPfizer Ltd ₹32.14 77.8% CHEAPER
-
nican 40mg tablet crRaptakos Brett & Co Ltd ₹35.63 75.4% CHEAPER
-
Sormo 40mg TabletMano Pharma Pvt Ltd ₹36.56 74.8% CHEAPER
-
ihd 40mg tabletStadmed Pvt Ltd ₹37.43 74.2% CHEAPER
Medical Note: Always consult your doctor before switching medications.
🛑 Myths vs. Facts
- Myth: This medicine can be used to relieve an acute angina attack.
Fact: This medicine is for prevention of angina attacks, not for immediate relief. For acute attacks, use fast-acting nitroglycerin as prescribed. - Myth: You can stop this medicine whenever you feel better.
Fact: Stopping this medicine suddenly can worsen angina. Always consult your doctor before stopping. - Myth: It is safe to take this medicine with sildenafil.
Fact: Combining this medicine with sildenafil or similar drugs can cause a dangerous drop in blood pressure. This combination is contraindicated. - Myth: This medicine can be crushed or chewed for faster action.
Fact: Crushing or chewing the extended-release tablet can release the entire dose at once, causing severe hypotension. Swallow it whole.
🔄 Alternative Options
Generic Alternatives
- Isosorbide Mononitrate 40 mg extended-release tablet
Brand Alternatives
- Ismo Retard Tablet ER