macrobid tablet - Clarithromycin (150mg) medicine

Macrobid Tablet (Clarithromycin 150mg): Complete Information

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🏭 Hema Laboratories 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 16, 2026
⚠️ Hepatotoxicity Risk 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for approved indications.
Reviewed by
SaathiMed Expert Panel | Oct 16, 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 or bloody diarrhea
  • Yellowing of skin or eyes
  • Difficulty breathing or swelling of face, lips, or throat
  • Irregular heartbeat or palpitations
  • Severe abdominal pain
  • Signs of an allergic reaction such as severe rash or hives

If experiencing severe symptoms, call emergency services immediately.

What is macrobid tablet used for?

This medicine contains clarithromycin, a macrolide antibiotic used to treat various bacterial infections. It works by stopping bacteria from making proteins they need to survive. It is taken orally, usually every 12 hours, and must be prescribed by a doctor.

  • Generic Name: Clarithromycin (150mg)
  • Manufacturer: Hema Laboratories
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 macrobid tablet के बारे में (Hindi Summary)

उपयोग: यह दवा क्लैरिथ्रोमाइसिन नामक एंटीबायोटिक है, जिसका उपयोग बैक्टीरियल संक्रमणों के इलाज के लिए किया जाता है। यह श्वसन तंत्र के संक्रमण, त्वचा के संक्रमण, और हेलिकोबैक्टर पाइलोरी के इलाज में प्रभावी है। यह वायरल संक्रमण जैसे सर्दी-जुकाम के लिए काम नहीं करती। इसे डॉक्टर के निर्देशानुसार ही लें।

साइड इफेक्ट्स: इस दवा के सामान्य दुष्प्रभावों में मतली, दस्त, पेट दर्द, स्वाद में बदलाव और सिरदर्द शामिल हैं। गंभीर दुष्प्रभाव दुर्लभ हैं, लेकिन तेज दस्त, पीलिया, या एलर्जी की प्रतिक्रिया हो सकती है। कोई भी गंभीर लक्षण दिखने पर तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें और कोर्स पूरा करें। इसे भोजन के साथ लेने से पेट की परेशानी कम हो सकती है। शराब का सेवन न करें। अपने डॉक्टर को अन्य सभी दवाओं के बारे में बताएं। इसे बच्चों की पहुंच से दूर रखें।

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

💊 macrobid tablet Uses & Benefits

  • [{"condition":"Community-acquired respiratory tract infections","description":"Used to treat bacterial bronchitis, pneumonia, and other lower respiratory infections caused by susceptible organisms.","evidence":"Well-established"},{"condition":"Skin and soft tissue infections","description":"Effective against many bacterial skin infections such as cellulitis and impetigo when caused by susceptible bacteria.","evidence":"Well-established"},{"condition":"Helicobacter pylori eradication","description":"Used as part of combination regimens to treat H.
  • pylori infection in peptic ulcer disease.","evidence":"Well-established"},{"condition":"Mycobacterium avium complex (MAC) infection","description":"Used for prevention and treatment of disseminated MAC in patients with advanced HIV infection.","evidence":"Well-established"},{"condition":"Sexually transmitted infections","description":"May be used for certain infections such as chlamydia when other options are not suitable.","evidence":"Moderate"}]

Off-label uses: [{"condition":"Chronic rhinosinusitis","description":"Sometimes prescribed off-label for persistent sinus infections when other antibiotics are not effective.","evidence":"Limited"},{"condition":"Lyme disease","description":"Occasionally used off-label for early Lyme disease in patients who cannot take doxycycline.","evidence":"Limited"}]

Primary treatment for: Bacterial infections

Also treats: Respiratory tract infections, Skin infections, Helicobacter pylori infection, Mycobacterium avium complex infection

📋 Drug Information

Generic Name(s)Clarithromycin (150mg)
Brand Namemacrobid tablet
ManufacturerHema Laboratories
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassMacrolides
Route of AdministrationOral
StorageStore at room temperature between 15°C and 30°C (59°F to 86°F) in a dry place, away from direct sunlight and moisture.
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
Complete the full prescribed course even if you feel better.
3
Avoid alcohol while taking this medicine.
4
Inform your doctor about all other medicines you take, especially blood thinners and heart medicines.
5
Do not share this medicine with others.
6
Report any severe diarrhea, rash, or yellowing of eyes to your doctor immediately.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Persistent cough with fever
This medicine is commonly prescribed for respiratory infections.
Likely Use
✅
Skin redness and swelling
This medicine is used for bacterial skin infections.
Likely Use
❌
Common cold
This medicine is not effective against viral infections.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionClarithromycin is rapidly absorbed from the gastrointestinal tract after oral administration. The absolute bioavailability is approximately 50-55% due to first-pass metabolism.
DistributionClarithromycin distributes widely into body tissues and fluids, including lung tissue, tonsils, and skin. It achieves higher tissue concentrations than plasma concentrations. It also penetrates into middle ear fluid and nasal secretions.
Protein BindingClarithromycin is approximately 70% bound to plasma proteins, primarily to alpha-1-acid glycoprotein and albumin.
MetabolismClarithromycin is extensively metabolized in the liver by the cytochrome P450 enzyme system, primarily CYP3A4. Its major active metabolite is 14-hydroxyclarithromycin, which also has antibacterial activity.
Half-LifeThe elimination half-life of clarithromycin is approximately 3 to 4 hours in healthy adults, but it may be prolonged in patients with renal impairment.
ExcretionClarithromycin and its metabolites are excreted primarily in the urine (about 30-40% as unchanged drug) and in the feces. Renal impairment can significantly affect elimination.
BioavailabilityThe oral bioavailability of clarithromycin is approximately 50-55%.
Onset of ActionThe onset of antibacterial action begins within a few hours after the first dose, but clinical improvement of symptoms may take 1 to 3 days.
Peak Plasma TimePeak plasma concentrations are reached approximately 2 to 3 hours after oral administration.
Duration of ActionThe antibacterial effect persists for about 12 hours after a dose, which supports twice-daily dosing for most indications.

How It Works

This medicine works by binding to the 50S ribosomal subunit of susceptible bacteria, blocking the translocation step of protein synthesis. This prevents the bacteria from building essential proteins, which stops their growth and multiplication. Because human cells do not have a 50S ribosomal subunit, the medicine selectively targets bacteria with minimal effect on human protein production.

Mechanism Steps

1
Entry into bacterial cell: Clarithromycin enters the bacterial cell and accumulates in the cytoplasm.
2
Binding to 50S subunit: It binds reversibly to the 50S ribosomal subunit, specifically near the peptidyl transferase center.
3
Blocking protein synthesis: This binding prevents the translocation of tRNA and inhibits the elongation of the growing peptide chain.
4
Inhibition of bacterial growth: Without essential proteins, bacteria cannot multiply, and the immune system can clear the infection.

💡 How to Take macrobid tablet

Strength: Clarithromycin 150 mg immediate-release tablet

1Swallow the tablet whole with a full glass of water.
2Take with or without food, but with food if it upsets your stomach.
3Take at evenly spaced intervals as prescribed.
4Do not crush, chew, or break the tablet unless instructed.
5Complete the full course of treatment even if you feel better.

Dosage Information

Adult DosageThe usual adult dose of this medicine is 250 mg to 500 mg taken orally every 12 hours, depending on the type and severity of the infection. For some infections, a dose of 500 mg every 12 hours may be used. The duration of treatment varies from 7 to 14 days, but may be longer for certain infections. 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 side effects of this medicine, especially cardiac effects and hearing loss. Dose adjustment may be necessary based on renal function. Consult a doctor for appropriate dosing.
Renal ImpairmentIn patients with severe renal impairment (creatinine clearance <30 mL/min), the dose of this medicine should be reduced by half or the dosing interval extended. Consult a doctor for appropriate dose adjustment.
Hepatic ImpairmentIn patients with severe hepatic impairment, caution is advised. Dose adjustment may be necessary. Consult a doctor.
Maximum Daily DoseThe maximum recommended daily dose is 1000 mg (500 mg twice daily) for most indications, but higher doses may be used in certain severe infections under medical supervision.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
Take with meals
Reduces stomach upset.
Grapefruit
Avoid
May increase drug levels and side 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 macrobid tablet

✅ Common Side Effects

Nausea (Common (up to 10%))
Take with food and drink plenty of water. If nausea persists, consult your doctor.
Diarrhea (Common (up to 10%))
Stay hydrated. If diarrhea is severe or contains blood, seek medical advice immediately.
Abdominal pain (Common (5-10%))
Take with meals. If pain is severe or persistent, contact your doctor.
Altered taste (Common (5-10%))
This usually resolves after finishing the course. Avoid strong-flavored foods if it bothers you.
Headache (Common (5-10%))
Rest and stay hydrated. Consult your doctor if headaches are severe or persistent.

🚨 Serious Side Effects

Clostridium difficile-associated diarrhea (Rare (<1%))
Seek immediate medical attention if you develop severe, persistent diarrhea, abdominal cramps, or blood in stool.
Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Call emergency services if you experience swelling of the face, lips, tongue, or throat, difficulty breathing, or a severe rash.
Liver toxicity (Rare (<0.1%))
Report yellowing of skin or eyes, dark urine, or severe abdominal pain to your doctor immediately.
QT prolongation and arrhythmias (Rare (<0.1%))
Seek medical help if you feel palpitations, dizziness, or fainting.

⚠️ Rare Side Effects

Stevens-Johnson syndrome
Seek immediate medical attention if you develop a painful rash with blisters or peeling skin.
Pancreatitis
Report severe upper abdominal pain radiating to the back to your doctor immediately.
Seizures
Call emergency services if you experience a seizure.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major
Cisapride Major
Simvastatin Major
Carbamazepine Moderate
Digoxin Moderate
Fluconazole Moderate
Rifampicin Moderate
Antacids Minor
Oral contraceptives Minor
Theophylline Moderate

🚨 Major Interactions

  • Cisapride
  • Pimozide
  • Ergotamine
  • Lovastatin and simvastatin
  • Warfarin

⚡ Moderate Interactions

  • Carbamazepine
  • Cyclosporine
  • Digoxin
  • Fluconazole
  • Rifampicin

🍷 Alcohol Interaction

Alcohol may worsen stomach irritation, nausea, and dizziness associated with this medicine. 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 clarithromycin or other macrolide antibiotics","Concomitant use with cisapride, pimozide, ergotamine, or dihydroergotamine","History of QT prolongation or ventricular arrhythmias","Severe hepatic impairment","Concomitant use with lovastatin or simvastatin"]

⚠️ Warnings & Precautions

["Use with caution in patients with renal impairment; dose adjustment may be needed.","May cause severe diarrhea associated with Clostridium difficile; discontinue if suspected.","Can prolong QT interval; avoid in patients with risk factors.","May exacerbate myasthenia gravis symptoms.","Avoid in pregnancy unless clearly needed.","Not recommended during breastfeeding.","May interact with many drugs; review all medications before starting."]

🤱 Lactation Safety

Clarithromycin is excreted in breast milk. It is generally not recommended during breastfeeding unless the benefit to the mother outweighs the risk to the infant. Consult your doctor.

💊 Overdose Management

Overdose of this medicine may cause severe nausea, vomiting, diarrhea, and electrolyte imbalances. There is no specific antidote. Treatment is supportive and symptomatic. Contact a poison control center or emergency department immediately if overdose is suspected.

⏰ 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 two doses at once to make up for a missed dose.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor, and do not skip doses or stop early even if you feel better. Complete the full course to prevent the infection from returning and to reduce the risk of antibiotic resistance. Swallow the tablet whole with a glass of water, with or without food, but taking it with food may help if you get stomach upset. Avoid alcohol while taking this medicine because it can worsen stomach irritation and dizziness. Tell your doctor about all other medicines you take, especially blood thinners, heart rhythm medicines, and migraine medicines, because clarithromycin can interact with many drugs. Do not share this medicine with anyone else, and keep it out of reach of children.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more prone to side effects such as hearing loss, cardiac arrhythmias, and renal impairment. Dose adjustment may be needed based on kidney function.

🤰 Pregnancy Planning (TTC)

If you are planning pregnancy, consult your doctor before taking this medicine. It is generally avoided during pregnancy unless clearly needed.

🏥 Post-Surgery Considerations

Inform your surgeon if you are taking this medicine before surgery, as it may interact with anesthetic agents.

🦷 Dental Procedures

Inform your dentist if you are taking this medicine, as it may interact with certain antibiotics or anesthetics used during dental procedures.

💚 Lifestyle Tips for Better Results

🏃
Stay well hydrated.
🥗
Get plenty of rest to help your body fight the infection.
😴
Eat a balanced diet rich in fruits and vegetables.
💧
Avoid alcohol while taking this medicine.
🧘
Practice good hand hygiene to prevent spreading infections.

🏋️ Exercise Considerations

If you experience dizziness or fatigue while taking this medicine, avoid strenuous exercise until you feel better.

🥗 Diet Recommendations

Include probiotic-rich foods like yogurt to support gut health.
Stay well hydrated.
Avoid spicy and oily foods if you have stomach upset.

💼 Impact on Daily Work & Life

This medicine may cause dizziness or tiredness in some people. Avoid driving or operating heavy machinery if you feel unwell.

🛑 When to Stop This Medicine

Do not stop this medicine without consulting your doctor. Complete the full prescribed course even if you feel better. If you experience severe side effects, contact your doctor immediately.

📅 Long-Term Use Effects

Long-term use of this medicine may lead to antibiotic resistance, altered gut flora, and rarely liver or heart issues. It is usually prescribed for short courses. Prolonged use should be monitored by a doctor.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Azithromycin

Another macrolide antibiotic that may be used as an alternative for certain infections.

Evidence: Well-established
Amoxicillin

A penicillin antibiotic that may be used for some respiratory and skin infections.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

This medicine does not interact with vaccines. However, if you are scheduled for a live vaccine, consult your doctor as antibiotics may affect the vaccine's effectiveness.

📦 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 at room temperature and protect from extreme heat or moisture. If traveling across time zones, adjust dosing times gradually in consultation with your doctor. Check customs regulations for carrying prescription medicines.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 35-year-old man with a persistent cough and fever
He was prescribed this medicine for a respiratory infection. After 3 days, his fever subsided and cough improved. He completed the 10-day course as advised and recovered fully.
💡 Lesson: Completing the full course of antibiotics is essential to prevent recurrence and resistance.
👤 A 50-year-old woman with a skin infection
She started this medicine and noticed improvement in redness and swelling within 2 days. She experienced mild nausea, which was managed by taking the tablet with food.
💡 Lesson: Taking the medicine with food can help reduce stomach-related side effects.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: You may start feeling better within 1 to 3 days, but it is important to complete the full course as prescribed.

Q: Can I take this medicine with food?

A: Yes, you can take it with or without food. Taking it with food may help reduce stomach upset.

Q: Is it safe during pregnancy?

A: This medicine is generally avoided during pregnancy unless clearly needed. Consult your doctor.

🤔 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 macrobid 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 viral infections like the common cold.
    Fact: This medicine is an antibiotic and only works against bacterial infections. It does not treat viral infections.
  • Myth: You can stop taking this medicine as soon as you feel better.
    Fact: You must complete the full prescribed course to prevent the infection from returning and to avoid antibiotic resistance.
  • Myth: This medicine is safe to take with any other medication.
    Fact: This medicine can interact with many drugs, including blood thinners and heart medicines. Always inform your doctor about all medicines you take.

🔄 Alternative Options

Generic Alternatives

  • Clarithromycin 150 mg tablet

Brand Alternatives

  • Macrobid Tablet

📊 Comparison with Similar Medicines

[{"medicine":"Clarithromycin","class":"Macrolide antibiotic","common_use":"Respiratory, skin, H. pylori infections","half_life":"3-4 hours"},{"medicine":"Azithromycin","class":"Macrolide antibiotic","common_use":"Respiratory, skin, STIs","half_life":"68 hours"},{"medicine":"Erythromycin","class":"Macrolide antibiotic","common_use":"Respiratory, skin, eye infections","half_life":"1.5-2 hours"}]

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