comelt a 300mg/30mg tablet - Acetylcysteine (300mg) + Ambroxol (30mg) medicine

Comelt A 300mg/30mg Tablet: Complete Medicine Guide

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🏭 Jabs Biotech Pvt Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 22, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Moderate for approved indications.
Reviewed by
SaathiMed Expert Panel | Oct 22, 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

  • Blood in stool or vomit
  • Severe abdominal pain
  • Chest pain or difficulty breathing
  • Severe headache with visual changes
  • Sudden swelling of face, lips, or throat
  • Yellowing of skin or eyes
  • Decreased urine output
  • Severe skin rash with blistering or peeling

If experiencing severe symptoms, call emergency services immediately.

What is comelt a 300mg/30mg tablet used for?

This medicine is a combination of acetylcysteine and ambroxol used to treat respiratory conditions with thick mucus. It works by thinning mucus and helping you cough it out. Take it as prescribed by your doctor.

  • Generic Name: Acetylcysteine + Ambroxol
  • Manufacturer: Jabs Biotech Pvt Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 comelt a 300mg/30mg tablet के बारे में (Hindi Summary)

उपयोग: यह दवा एसिटाइलसिस्टीन और एम्ब्रोक्सोल का संयोजन है, जिसका उपयोग श्वसन संबंधी समस्याओं में गाढ़े बलगम को पतला करने और उसे बाहर निकालने में मदद करने के लिए किया जाता है। यह ब्रोंकाइटिस, सीओपीडी और अन्य स्थितियों में लाभकारी है जहां बलगम के कारण खांसी और सांस लेने में कठिनाई होती है।

साइड इफेक्ट्स: आम दुष्प्रभावों में मतली, उल्टी, पेट में गड़बड़ी, और दस्त शामिल हैं। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन यदि आपको चेहरे, होंठ या गले में सूजन, सांस लेने में कठिनाई, या गंभीर दाने हों तो तुरंत डॉक्टर से मिलें।

सुरक्षा सलाह: इस दवा को डॉक्टर के निर्देशानुसार ही लें। इसे भोजन के साथ लेने से पेट की जलन कम हो सकती है। यदि आपको पेट के अल्सर, अस्थमा, या गुर्दे/यकृत की समस्या है तो डॉक्टर को बताएं। गर्भावस्था या स्तनपान के दौरान डॉक्टर से सलाह लें। शराब का सेवन न करें।

💡 Did You Know? The first generic medicine was introduced in India in 1970 after the Patents Act was amended.

💊 comelt a 300mg/30mg tablet Uses & Benefits

[{"condition":"Acute bronchitis","description":"Helps loosen thick mucus in the airways, making it easier to cough out and relieving chest congestion.","evidence":"Well-established"},{"condition":"Chronic bronchitis","description":"Reduces mucus viscosity and improves clearance, helping to ease breathing and reduce cough frequency.","evidence":"Well-established"},{"condition":"COPD (Chronic Obstructive Pulmonary Disease)","description":"Used as an adjunct to help manage mucus hypersecretion and improve airway clearance in stable COPD.","evidence":"Moderate"},{"condition":"Cystic fibrosis","description":"May help thin thick secretions in some patients, but not a primary treatment.","evidence":"Limited"},{"condition":"Post-operative respiratory complications","description":"Sometimes used to prevent or treat mucus plugging after surgery in high-risk patients.","evidence":"Limited"}]

Off-label uses: [{"condition":"Prevention of contrast-induced nephropathy","description":"Acetylcysteine has been studied for protecting kidneys from contrast dye, but evidence is conflicting and it is not routinely recommended.","evidence":"Limited"},{"condition":"Infertility in women with polycystic ovary syndrome","description":"Acetylcysteine has been explored as an adjunct to improve ovulation and pregnancy rates, but it is not a standard treatment.","evidence":"Limited"}]

Primary treatment for: Respiratory conditions with excessive mucus

Also treats: Acute bronchitis, Chronic bronchitis, COPD, Cystic fibrosis

📋 Drug Information

Generic Name(s)Acetylcysteine + Ambroxol
Brand NameComelt A
ManufacturerJabs Biotech Pvt Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassRESPIRATORY
Action ClassMucolytic and Expectorant
Route of AdministrationOral
StorageStore at room temperature (15-30°C) in a dry place, away from direct sunlight and moisture. Keep out of reach of children.
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 with food to reduce stomach upset.
2
Stay well hydrated throughout the day to help thin mucus.
3
Avoid alcohol while taking this medicine.
4
Do not take more than the prescribed dose.
5
Consult your doctor if symptoms persist beyond 7 days.
6
Report any unusual bleeding or bruising immediately.
7
If you have asthma, keep your rescue inhaler handy as this medicine can rarely cause bronchospasm.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Chest congestion with thick mucus
This medicine is commonly prescribed for this.
Likely Use
❌
Dry cough
This medicine is not for dry cough; it is for cough with mucus.
Not Primary
❌
Fever
This medicine is not a primary fever reducer.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionBoth acetylcysteine and ambroxol are rapidly absorbed from the gastrointestinal tract after oral administration. Acetylcysteine undergoes first-pass metabolism, resulting in low oral bioavailability. Ambroxol is well absorbed and undergoes first-pass metabolism to some extent.
DistributionAcetylcysteine is distributed widely in body tissues and fluids. Ambroxol is distributed to lung tissue, where it exerts its effects. Both agents can cross the placenta and are excreted in breast milk.
Protein BindingAcetylcysteine is approximately 50% bound to plasma proteins. Ambroxol is about 90% bound to plasma proteins.
MetabolismAcetylcysteine is metabolized in the liver to cysteine, diacetylcysteine, and other metabolites. Ambroxol is metabolized in the liver by cytochrome P450 enzymes, primarily CYP3A4, to dibromanthranilic acid and other metabolites.
Half-LifeThe elimination half-life of acetylcysteine is about 2 to 6 hours. The elimination half-life of ambroxol is approximately 7 to 12 hours.
ExcretionAcetylcysteine and its metabolites are excreted mainly in the urine. Ambroxol and its metabolites are also excreted primarily in the urine.
BioavailabilityThe oral bioavailability of acetylcysteine is low, approximately 4% to 10%, due to extensive first-pass metabolism. The oral bioavailability of ambroxol is about 70% to 80%.
Onset of ActionThe onset of action for acetylcysteine is typically within 30 to 60 minutes after oral administration. Ambroxol's effects begin within 1 to 2 hours.
Peak Plasma TimePeak plasma concentrations of acetylcysteine are reached about 1 to 2 hours after oral administration. For ambroxol, peak plasma levels occur within 1 to 3 hours.
Duration of ActionThe duration of action for acetylcysteine is about 4 to 6 hours. For ambroxol, the effects last approximately 8 to 12 hours.

How It Works

This medicine combines two mucoactive agents. Acetylcysteine is a mucolytic that breaks disulfide bonds in mucoproteins, reducing mucus viscosity. Ambroxol is a mucokinetic agent that increases serous bronchial secretion, enhances ciliary motility, and stimulates surfactant production. Together, they improve mucus clearance from the respiratory tract.

Mechanism Steps

1
Acetylcysteine breaks disulfide bonds: Acetylcysteine contains a free sulfhydryl group that reduces disulfide bonds in mucus glycoproteins, making the mucus less viscous and easier to clear.
2
Ambroxol enhances serous secretion: Ambroxol stimulates the production of thinner, watery mucus and increases the activity of cilia, helping to move mucus out of the airways.
3
Combined effect on mucus clearance: The two agents work together to thin mucus and improve its transport, leading to better airway clearance and reduced cough.

💡 How to Take comelt a 300mg/30mg tablet

Strength: Each tablet contains acetylcysteine 300 mg and ambroxol 30 mg.

1Swallow the tablet whole with a glass of water.
2Do not crush, chew, or break the tablet.
3Take it with or without food, but preferably with meals to reduce stomach upset.
4Take it at the same times each day to maintain consistent levels.
5If you have trouble swallowing, consult your doctor or pharmacist.

Dosage Information

Adult DosageThe usual adult dose is one tablet (acetylcysteine 300 mg + ambroxol 30 mg) two to three times daily, or as directed by your doctor. The dose may be adjusted based on your condition and response. Do not exceed the recommended dose. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may be more sensitive to the effects of this medicine. Dose adjustment may be necessary based on renal and hepatic function. Consult your doctor for appropriate dosing.
Renal ImpairmentDose adjustment may be needed in patients with severe renal impairment. Consult your doctor.
Hepatic ImpairmentDose adjustment may be needed in patients with severe hepatic impairment. Consult your doctor.
Maximum Daily DoseThe maximum recommended daily dose is 3 tablets (acetylcysteine 900 mg + ambroxol 90 mg) per day, unless otherwise prescribed by a doctor.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
Take with meals
Reduces stomach upset.
Grapefruit
No known interaction
No significant interaction reported.

⏰ 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 comelt a 300mg/30mg tablet

✅ Common Side Effects

Nausea (Common (5-10%))
Take with food to reduce nausea. If it persists, consult your doctor.
Vomiting (Common (5-10%))
Stay hydrated and avoid heavy meals. If vomiting is severe, contact your doctor.
Stomach upset (Common (5-10%))
Take with a meal or snack. Avoid spicy foods.
Heartburn (Common (5-10%))
Take with food and avoid lying down immediately after taking the medicine.
Diarrhea (Uncommon (1-5%))
Drink plenty of fluids. If diarrhea persists, consult your doctor.

🚨 Serious Side Effects

Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Seek immediate medical attention if you experience swelling of the face, lips, or throat, difficulty breathing, or a severe rash.
Severe skin reactions (Stevens-Johnson syndrome, toxic epidermal necrolysis) (Very rare (<0.01%))
Stop the medicine and seek emergency care if you develop a painful rash, blistering, or peeling skin.
Bronchospasm (Rare (<0.1%))
If you have asthma and experience increased wheezing or difficulty breathing, stop the medicine and seek immediate medical help.
Gastrointestinal bleeding (Rare (<0.1%))
Seek immediate medical attention if you notice black, tarry stools or vomit blood.

⚠️ Rare Side Effects

Headache
Usually resolves on its own. If persistent, consult your doctor.
Dizziness
Avoid driving or operating machinery until you know how this medicine affects you.
Tinnitus (ringing in the ears)
Report to your doctor if it bothers you.
Rash
If rash is mild, monitor. If it spreads or is accompanied by fever, seek medical advice.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Nitroglycerin Major
Cough suppressants Major
Antibiotics Moderate
Antihypertensives Moderate
Activated charcoal Minor

🚨 Major Interactions

  • Nitroglycerin
  • Cough suppressants (e.g., codeine, dextromethorphan)

⚡ Moderate Interactions

  • Antibiotics (e.g., amoxicillin, tetracycline, cephalosporins)
  • Antihypertensives

🍷 Alcohol Interaction

Alcohol may increase the risk of stomach irritation and gastrointestinal bleeding. It is advisable to avoid alcohol while taking this medicine.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to acetylcysteine, ambroxol, or any component of the formulation.","Active peptic ulcer disease.","Phenylketonuria (some formulations may contain aspartame).","Children under 12 years of age (unless specifically prescribed by a doctor).","Severe hepatic or renal impairment (relative contraindication; consult doctor)."]

⚠️ Warnings & Precautions

["Use with caution in patients with asthma or bronchospasm; acetylcysteine can rarely cause bronchospasm.","Use with caution in patients with a history of peptic ulcer or gastrointestinal bleeding.","Avoid use in patients with phenylketonuria if the formulation contains aspartame.","Do not use for more than 14 days without medical advice.","If symptoms persist or worsen, consult a doctor.","Avoid concurrent use with cough suppressants.","Use with caution in the elderly and in patients with renal or hepatic impairment.","Pregnant and breastfeeding women should consult a doctor before use."]

🤱 Lactation Safety

It is not known whether acetylcysteine and ambroxol pass into breast milk. Consult your doctor before using this medicine while breastfeeding.

💊 Overdose Management

Overdose with this combination is unlikely to cause serious harm, but may cause nausea, vomiting, and diarrhea. In case of overdose, seek immediate medical attention. Treatment is supportive and symptomatic. There is no specific antidote.

⏰ 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 double the dose to catch up.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor. Do not take more or less than the recommended dose. Swallow the tablet whole with a glass of water. It can be taken with or without food, but taking it with food may reduce stomach upset. If you have a history of stomach ulcers, asthma, or kidney or liver problems, tell your doctor before taking this medicine. Do not use this medicine for more than 14 days without consulting your doctor. Avoid drinking alcohol while taking this medicine as it may increase stomach irritation. If you are pregnant, planning to become pregnant, or breastfeeding, consult your doctor before using this medicine. Keep this medicine out of reach of children. Store it at room temperature, away from moisture and direct sunlight. Do not use it after the expiry date.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more sensitive to the effects of this medicine. Dose adjustment may be needed based on kidney and liver function. Monitor for side effects closely.

🤰 Pregnancy Planning (TTC)

If you are planning to become pregnant, consult your doctor before taking this medicine. It should be used during pregnancy only if clearly needed and prescribed by a doctor.

🏥 Post-Surgery Considerations

This medicine may be used after surgery to prevent mucus plugging in high-risk patients. Follow your doctor's instructions for use.

🦷 Dental Procedures

No specific precautions are required for dental procedures. However, inform your dentist about all medicines you are taking.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight to reduce respiratory effort.
🥗
Regular low-impact exercise like walking or swimming.
😴
Practice good posture to help lung expansion.
💧
Include anti-inflammatory foods in your diet.
🧘
Get adequate sleep to support immune function.
🌞
Avoid smoking and exposure to secondhand smoke.

🏋️ Exercise Considerations

If you have exercise-induced asthma or breathing difficulties, consult your doctor before starting any exercise program. Take your rescue inhaler if prescribed.

🥗 Diet Recommendations

Include omega-3 rich foods like fish and flaxseeds.
Reduce processed food intake.
Stay well hydrated to help thin mucus.
Avoid spicy foods if you have stomach upset.

💼 Impact on Daily Work & Life

This medicine may cause dizziness in some people. Avoid driving or operating heavy machinery until you know how it affects you. It is generally safe to continue normal daily activities, but take rest if you feel unwell.

🛑 When to Stop This Medicine

Stop taking this medicine and consult your doctor if your symptoms do not improve within 7 days, if they worsen, or if you experience any serious side effects. Do not stop abruptly if you have been on long-term therapy without medical advice.

📅 Long-Term Use Effects

Long-term use of this medicine beyond 14 days should be under medical supervision. Prolonged use may lead to gastrointestinal discomfort. Regular monitoring of liver and kidney function may be advised if used for extended periods. Do not use continuously without consulting your doctor.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Steam inhalation

Can help loosen mucus and ease breathing.

Evidence: Well-established
Hydration

Drinking plenty of fluids helps thin mucus.

Evidence: Well-established
Chest physiotherapy

Techniques to help clear mucus from airways.

Evidence: Moderate

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

No specific interactions with vaccines are known. However, if you are scheduled for vaccination, inform your doctor about this medicine.

📦 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, away from direct sunlight and moisture. If traveling across time zones, adjust your dosing schedule gradually, but consult your doctor for specific advice. Keep enough supply for your trip and check customs regulations for carrying prescription medicines.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 45-year-old office worker with chronic bronchitis
Started this medicine as prescribed for chronic bronchitis. Within a few days, noticed that coughing up mucus became easier and breathing felt less labored. Emphasized taking it with meals to avoid stomach upset.
💡 Lesson: Consistency with prescribed dose and taking with food improves both efficacy and tolerability.
👤 A 60-year-old retired teacher with COPD
Used this medicine as part of COPD management. Found that combining it with regular breathing exercises and staying hydrated helped clear mucus more effectively. Experienced mild nausea initially, which subsided after taking it with food.
💡 Lesson: Lifestyle measures like hydration and exercise enhance the medicine's effect.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: You may start to notice improvement in mucus clearance within a few hours to a day, but full effects may take 2-3 days.

Q: Can I take it with other medicines?

A: Some medicines may interact. Always inform your doctor about all medicines you are taking.

Q: Is it safe during pregnancy?

A: Consult your doctor before use if you are pregnant or planning to become pregnant.

Q: What are the common side effects?

A: Common side effects include nausea, vomiting, and stomach upset. These are usually mild.

Q: Can I drink alcohol while taking it?

A: It is advisable to avoid alcohol as it may increase stomach irritation.

🤔 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 comelt a 300mg/30mg 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 cure any cough.
    Fact: It is only for cough with thick mucus. It is not effective for dry cough or cough due to allergies.
  • Myth: It is safe to take for a long time without doctor's advice.
    Fact: It should not be used for more than 14 days without consulting a doctor.
  • Myth: It can be taken with cough syrups.
    Fact: Cough suppressants may interfere with its action. Consult your doctor before combining.

🔄 Alternative Options

Generic Alternatives

  • Acetylcysteine 300 mg + Ambroxol 30 mg tablet (various manufacturers)

Brand Alternatives

  • Comelt A 300mg/30mg Tablet

📊 Comparison with Similar Medicines

[{"medicine":"This medicine","active_ingredients":"Acetylcysteine 300 mg + Ambroxol 30 mg","form":"Tablet","primary_use":"Mucus clearance"},{"medicine":"Acetylcysteine 600 mg","active_ingredients":"Acetylcysteine 600 mg","form":"Effervescent tablet","primary_use":"Mucus clearance"},{"medicine":"Ambroxol 30 mg","active_ingredients":"Ambroxol 30 mg","form":"Tablet","primary_use":"Mucus clearance"}]

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