angifree 20mg tablet - Isosorbide Mononitrate (20mg) medicine

Angicor 20mg Tablet (isosorbide Mononitrate): Complete Medicine Guide

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🏭 Micro Labs Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 28, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for angina prophylaxis.
Reviewed by
SaathiMed Expert Panel | Oct 28, 2026
🩺
Medically Fact-Checked & Clinically Verified by SaathiMed Clinical Review Board
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026

When to Call Your Doctor IMMEDIATELY

  • Severe chest pain that does not respond to rest or fast-acting nitrates
  • Fainting or severe dizziness
  • Bluish lips or skin, confusion, or shortness of breath
  • Severe headache that does not improve
  • Rash, itching, or swelling of the face, lips, or throat
  • Slow or irregular heartbeat
  • Sudden increase in the frequency or severity of angina attacks

If experiencing severe symptoms, call emergency services immediately.

What is angifree 20mg tablet used for?

This medicine is an oral nitrate used to prevent angina attacks. It works by relaxing blood vessels to improve blood flow to the heart. It is not for immediate relief of an ongoing angina attack.

  • Generic Name: Isosorbide Mononitrate
  • Manufacturer: Micro Labs Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 angifree 20mg tablet के बारे में (Hindi Summary)

उपयोग: यह दवा एंजाइना (सीने में दर्द) के दौरों को रोकने के लिए इस्तेमाल की जाती है। यह रक्त वाहिकाओं को फैलाकर हृदय तक रक्त का प्रवाह बढ़ाती है और हृदय पर दबाव कम करती है। यह दवा तीव्र एंजाइना के दौरे के तत्काल उपचार के लिए नहीं है। इसका उपयोग दिल की बीमारी वाले रोगियों में लंबे समय तक एंजाइना को रोकने के लिए किया जाता है।

साइड इफेक्ट्स: सबसे आम दुष्प्रभाव सिरदर्द है, जो आमतौर पर इलाज शुरू करने पर होता है और समय के साथ कम हो जाता है। अन्य सामान्य दुष्प्रभावों में चक्कर आना, हल्का सिर घूमना, चेहरे पर लालिमा और दिल की धड़कन तेज होना शामिल हैं। गंभीर दुष्प्रभाव दुर्लभ हैं लेकिन इनमें गंभीर निम्न रक्तचाप, बेहोशी और एलर्जी प्रतिक्रिया शामिल हो सकती है।

सुरक्षा सलाह: इस दवा को अपने डॉक्टर के निर्देशानुसार ही लें। दवा की खुराक बदलें या बंद करें नहीं। सहनशीलता से बचने के लिए डॉक्टर द्वारा बताए गए नाइट्रेट-मुक्त अंतराल का पालन करें। शराब से बचें क्योंकि इससे रक्तचाप कम हो सकता है और चक्कर आ सकते हैं। सिल्डेनाफिल, टैडालाफिल जैसी दवाएं इस दवा के साथ न लें। बैठने या लेटने से उठते समय धीरे-धीरे उठें। किसी भी सर्जरी या दंत प्रक्रिया से पहले अपने डॉक्टर को इस दवा के बारे में बताएं।

💡 Did You Know? India is the largest provider of generic medicines globally, supplying over 50% of global vaccine demand.

💊 angifree 20mg tablet Uses & Benefits

[{"condition":"Prevention of angina pectoris","description":"Used for long-term prophylaxis of angina attacks in patients with coronary artery disease.","evidence":"Well-established"},{"condition":"Heart failure (adjunct)","description":"May be used as part of combination therapy in chronic heart failure to reduce symptoms and improve exercise tolerance.","evidence":"Moderate"},{"condition":"Esophageal spasm","description":"Sometimes used to relieve esophageal spasm, though this is not a primary indication.","evidence":"Limited"}]

Off-label uses: [{"condition":"Raynaud's phenomenon","description":"Occasionally used to improve blood flow in Raynaud's phenomenon, but evidence is limited.","evidence":"Limited"},{"condition":"Prevention of contrast-induced nephropathy","description":"Investigated for prevention of kidney damage from contrast dyes, but not standard practice.","evidence":"Limited"}]

Primary treatment for: Angina pectoris

Also treats: Heart failure, Coronary artery disease

📋 Drug Information

Generic Name(s)Isosorbide Mononitrate
Brand NameAngicor
ManufacturerMicro Labs Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassCARDIAC
Action ClassNO Donors
Route of AdministrationOral
StorageStore at room temperature (15-30°C) in a dry place, away from direct sunlight and moisture. Keep in the original container.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine at the same time each day to maintain consistent blood levels.
2
Follow the nitrate-free interval prescribed by your doctor to prevent tolerance.
3
Rise slowly from sitting or lying down to avoid dizziness.
4
Avoid alcohol while taking this medicine as it can increase the risk of low blood pressure.
5
Do not take erectile dysfunction medicines while on this medicine.
6
Keep a record of your angina attacks and inform your doctor if they increase.
7
Do not stop this medicine abruptly without consulting your doctor.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Chest pain (angina)
This medicine is commonly prescribed for prevention of angina.
Likely Use
❌
Shortness of breath
This medicine is not a primary treatment for shortness of breath.
Not Primary
❌
High blood pressure
This medicine is not a primary antihypertensive.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionIsosorbide mononitrate is rapidly and completely absorbed from the gastrointestinal tract after oral administration. It is not subject to first-pass metabolism, resulting in high bioavailability.
DistributionIt is widely distributed in the body. The volume of distribution is approximately 0.6 L/kg. It crosses the placenta and is distributed into breast milk.
Protein BindingLess than 5% of isosorbide mononitrate is bound to plasma proteins.
MetabolismIsosorbide mononitrate is metabolized in the liver by denitration to isosorbide and other metabolites. It does not undergo significant first-pass metabolism.
Half-LifeThe elimination half-life is approximately 5 hours.
ExcretionThe drug and its metabolites are primarily excreted in the urine. About 96% of a dose is excreted renally.
BioavailabilityThe oral bioavailability of isosorbide mononitrate is nearly 100%.
Onset of ActionThe onset of action for angina prophylaxis is within 30 to 60 minutes after oral administration.
Peak Plasma TimePeak plasma concentrations are reached within 30 to 60 minutes after oral administration.
Duration of ActionThe duration of action is approximately 12 to 24 hours, depending on the dose and individual response.

How It Works

Isosorbide mononitrate is a nitrate that is converted in the body to nitric oxide, which activates guanylate cyclase. This leads to increased cyclic GMP, causing relaxation of vascular smooth muscle. The result is dilation of veins and arteries, which reduces preload and afterload on the heart, lowering myocardial oxygen demand and improving blood flow to the heart muscle.

Mechanism Steps

1
Conversion to nitric oxide: Isosorbide mononitrate is metabolized to release nitric oxide in vascular smooth muscle cells.
2
Activation of guanylate cyclase: Nitric oxide activates the enzyme guanylate cyclase, increasing cyclic GMP levels.
3
Smooth muscle relaxation: Increased cyclic GMP leads to relaxation of vascular smooth muscle, causing vasodilation.
4
Reduced cardiac workload: Vasodilation reduces preload and afterload, decreasing myocardial oxygen demand and relieving angina.

💡 How to Take angifree 20mg tablet

Strength: Isosorbide Mononitrate 20 mg immediate-release tablet

1Take this medicine orally with a glass of water.
2Swallow the tablet whole; do not crush or chew.
3Take it at the same time each day as prescribed.
4Follow the nitrate-free interval recommended by your doctor.
5Do not take more than the prescribed dose.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 20 mg once daily or as directed by your doctor. For angina prophylaxis, the dose may be increased to 40 mg or 60 mg once daily based on response. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not change the dose without consulting your doctor.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may be more sensitive to the blood pressure-lowering effects. Start with a low dose and monitor closely. Dose must be individualized by a qualified clinician.
Renal ImpairmentNo specific dose adjustment is established for renal impairment. Use with caution and monitor closely. Dose must be individualized by a qualified clinician.
Hepatic ImpairmentNo specific dose adjustment is established for hepatic impairment. Use with caution and monitor closely. Dose must be individualized by a qualified clinician.
Maximum Daily DoseThe maximum recommended daily dose is 120 mg, but doses above 80 mg are rarely used. Dose must be individualized by a qualified clinician.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food
Take with or without food
Food does not significantly affect absorption.
Grapefruit juice
Avoid
May increase drug levels and hypotensive effects.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed
→ Take the missed dose as soon as you remember.
💡 Continue with the regular schedule.
📌 More than half the dosing interval has passed
→ Skip the missed dose.
💡 Do not double dose to catch up.

⚠️ Side Effects of angifree 20mg tablet

✅ Common Side Effects

Headache (Common (up to 50%))
Usually improves with continued use. If severe or persistent, consult your doctor.
Dizziness (Common (10-20%))
Rise slowly from sitting or lying down. Avoid driving if affected.
Flushing (Common (5-10%))
Usually resolves on its own. Consult doctor if bothersome.
Tachycardia (Uncommon (1-5%))
Report to your doctor if persistent or associated with palpitations.

🚨 Serious Side Effects

Severe hypotension (Rare (<0.1%))
Seek immediate medical attention if you experience fainting, severe dizziness, or blurred vision.
Syncope (Rare (<0.1%))
Lie down and elevate legs if feeling faint. Seek medical help if it occurs.
Bradycardia (Rare (<0.1%))
Report a slow or irregular heartbeat to your doctor immediately.
Allergic reaction (Rare (<0.1%))
Seek emergency care if you develop rash, itching, swelling, or difficulty breathing.

⚠️ Rare Side Effects

Methemoglobinemia
Seek immediate medical attention if you experience bluish lips or skin, confusion, or shortness of breath.
Exfoliative dermatitis
Discontinue and seek medical help if severe skin peeling or rash occurs.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Sildenafil Major
Tadalafil Major
Riociguat Major
Metoprolol Moderate
Amlodipine Moderate
Lisinopril Moderate
Amitriptyline Moderate
Ibuprofen Minor
Alcohol Moderate
Grapefruit juice Minor

🚨 Major Interactions

  • Phosphodiesterase-5 inhibitors (e.g., sildenafil, tadalafil, vardenafil)
  • Riociguat

⚡ Moderate Interactions

  • Antihypertensives (e.g., beta-blockers, calcium channel blockers, ACE inhibitors)
  • Alcohol
  • Tricyclic antidepressants

🍷 Alcohol Interaction

Alcohol can enhance the blood pressure-lowering effect of this medicine, leading to dizziness, lightheadedness, and fainting. It is advisable to avoid alcohol or limit its intake while taking this medicine.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Hypersensitivity to isosorbide mononitrate or other nitrates","Severe hypotension (systolic blood pressure

⚠️ Warnings & Precautions

["Do not use for acute angina attacks; use a fast-acting nitrate for immediate relief.","Tolerance to the effects can develop; maintain a nitrate-free interval as prescribed.","Avoid abrupt discontinuation; may cause rebound angina.","Use with caution in patients with low blood pressure or volume depletion.","May cause dizziness; avoid driving or operating machinery until you know how it affects you.","Inform your doctor if you have liver or kidney disease.","Alcohol may enhance the hypotensive effect; avoid or limit intake."]

🤱 Lactation Safety

Isosorbide mononitrate is excreted in breast milk. Caution is advised when used during breastfeeding. Consult your doctor to weigh the benefits and risks.

💊 Overdose Management

Overdose can cause severe hypotension, headache, dizziness, palpitations, and fainting. If overdose is suspected, seek immediate medical attention. Treatment is supportive and symptomatic, including placing the patient in a supine position with legs elevated, and administering intravenous fluids if necessary. Methemoglobinemia may be treated with methylene blue if indicated.

⏰ Missed Dose

If you miss a dose, take it as soon as you remember. 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.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor, usually once daily or as directed. Do not change the dose or stop taking it without consulting your doctor. To avoid tolerance, your doctor may prescribe a nitrate-free interval, often at night. Rise slowly from sitting or lying down to prevent dizziness. Avoid alcohol, as it can increase the blood pressure-lowering effect and cause dizziness. Do not take erectile dysfunction medicines such as sildenafil, tadalafil, or vardenafil while on this medicine, as this can cause a dangerous drop in blood pressure. Inform all healthcare providers that you take this medicine before any surgery or dental procedure. Store the tablets at room temperature, away from moisture and heat. Keep out of reach of children.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more sensitive to the blood pressure-lowering effects. Start with a low dose and monitor blood pressure regularly. Rise slowly to prevent falls.

🤰 Pregnancy Planning (TTC)

Consult your doctor if you are planning pregnancy or are pregnant. This medicine should be used only if clearly needed and prescribed by a doctor.

🏥 Post-Surgery Considerations

Inform your surgeon and anesthesiologist that you are taking this medicine. It may interact with medications used during surgery and affect blood pressure.

🦷 Dental Procedures

Inform your dentist that you take this medicine before any dental procedure. It may affect blood pressure and interact with local anesthetics containing vasoconstrictors.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight to reduce the heart's workload.
🥗
Engage in regular low-impact exercise as advised by your doctor.
😴
Avoid smoking and limit alcohol intake.
💧
Eat a heart-healthy diet rich in fruits, vegetables, and whole grains.
🧘
Manage stress through relaxation techniques like deep breathing or meditation.
🌞
Get adequate sleep to support heart health.

🏋️ Exercise Considerations

Moderate exercise is generally safe, but avoid strenuous activities that may trigger angina. Consult your doctor before starting any new exercise program. Stop and rest if you experience chest pain, dizziness, or shortness of breath.

🥗 Diet Recommendations

Include omega-3 rich foods like fish and flaxseeds.
Reduce intake of processed and high-sodium foods.
Stay well hydrated.
Limit caffeine and alcohol.
Eat plenty of fruits and vegetables.

💼 Impact on Daily Work & Life

This medicine may cause dizziness or lightheadedness, especially when starting treatment. Avoid driving or operating heavy machinery until you know how it affects you. Most people can continue their normal work activities with caution.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. If you experience severe side effects or your condition changes, your doctor may adjust or discontinue the medicine. Abrupt withdrawal can worsen angina.

📅 Long-Term Use Effects

Long-term use may lead to tolerance if a nitrate-free interval is not maintained. Regular monitoring of blood pressure, heart rate, and angina frequency is recommended. Periodic review with your doctor is necessary to adjust the dose and assess the need for continued therapy.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Beta-blockers

Can be used for angina prophylaxis and may be combined with nitrates.

Evidence: Well-established
Calcium channel blockers

Alternative or add-on therapy for angina prevention.

Evidence: Well-established
Lifestyle modifications

Diet, exercise, and stress reduction complement medical therapy.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific vaccine interactions are established. However, inform your doctor about this medicine before receiving any vaccine.

📦 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

✈️ Traveling with This Medicine

Carry this medicine in its original packaging with a copy of your prescription. Store it at room temperature and protect it from moisture and heat. If traveling across time zones, consult your doctor about adjusting the dosing schedule. Keep enough supply for the entire trip and carry it in your hand luggage. Check customs regulations for carrying prescription medicines.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 58-year-old man with a history of coronary artery disease
He was prescribed this medicine for prevention of angina attacks. He initially experienced headaches but they subsided after a week. He learned to take the medicine at the same time each day and maintained a nitrate-free interval at night. His angina attacks reduced significantly, and he was able to resume his daily walks.
💡 Lesson: Consistent dosing and following the nitrate-free interval are key to effectiveness and tolerability.
👤 A 65-year-old woman with chronic stable angina
She was started on this medicine and advised to avoid alcohol. She occasionally felt dizzy when standing up quickly. Her doctor advised her to rise slowly. She also informed her dentist about the medicine before a dental procedure. She has had fewer angina episodes and better exercise tolerance.
💡 Lesson: Simple precautions like rising slowly and informing healthcare providers can prevent complications.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: This medicine starts working within 30 to 60 minutes after oral administration, but its full preventive effect may take a few days.

Q: Can I take this medicine for an acute angina attack?

A: No, this medicine is for prevention. For an acute attack, use a fast-acting nitrate as prescribed by your doctor.

Q: Can I stop taking this medicine suddenly?

A: No, stopping suddenly can cause rebound angina. Consult your doctor before stopping.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

  • Can I take this medicine long-term?
  • Will it affect my kidney function?
  • Can I drive after taking this medicine?
  • Does it interact with my blood pressure medicine?
  • What if I miss a dose?
  • Can I drink alcohol while taking this?

🔄 Substitutes for angifree 20mg tablet

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine can be taken for immediate chest pain relief.
    Fact: This medicine is for prevention of angina, not for acute attacks. A fast-acting nitrate is used for immediate relief.
  • Myth: It is safe to take erectile dysfunction medicines with this medicine.
    Fact: Combining this medicine with erectile dysfunction medicines can cause a dangerous drop in blood pressure and is contraindicated.
  • Myth: You can take this medicine continuously without a break.
    Fact: A nitrate-free interval is necessary to prevent tolerance and maintain effectiveness.

🔄 Alternative Options

Generic Alternatives

  • Isosorbide Mononitrate 20 mg tablet

Brand Alternatives

  • Angicor 20mg tablet

📊 Comparison with Similar Medicines

[{"medicine":"Isosorbide Mononitrate","class":"Nitrate","half_life":"5 hours","bioavailability":"~100%","main_use":"Angina prophylaxis"},{"medicine":"Isosorbide Dinitrate","class":"Nitrate","half_life":"1 hour","bioavailability":"20-25%","main_use":"Angina prophylaxis"},{"medicine":"Nitroglycerin","class":"Nitrate","half_life":"1-4 minutes","bioavailability":"Variable","main_use":"Acute angina relief"}]

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