rifaxigyl 550mg tablet - Rifaximin (550mg) medicine

Rifagut 550 Tablet: Complete Medicine Guide

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🏭 Medley Pharmaceuticals 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 23, 2026
⚠️ Hepatotoxicity Risk 🤰 Pregnancy Category This medicine is classified as Pregnancy Category C by the US FDA. Animal studies have shown some risk, but there are no adequate human studies. It should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Consult your doctor before use. 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for hepatic encephalopathy and irritable bowel syndrome with diarrhea.
Reviewed by
SaathiMed Expert Panel | Sep 23, 2026

When to Call Your Doctor IMMEDIATELY

  • Blood in your stool or vomit
  • Severe or worsening abdominal pain
  • Yellowing of your skin or eyes
  • Swelling of your face, lips, or throat
  • Difficulty breathing or chest pain
  • Severe diarrhea with dehydration
  • Unusual tiredness or confusion

If experiencing severe symptoms, call emergency services immediately.

What is rifaxigyl 550mg tablet used for?

This medicine is a prescription oral antibiotic containing rifaximin 550 mg. It is used to treat hepatic encephalopathy in adults with liver disease and irritable bowel syndrome with diarrhea. It works by reducing harmful bacteria in the gut. It is poorly absorbed, so it acts mainly in the intestines.

  • Generic Name: Rifaximin (550mg)
  • Manufacturer: Medley Pharmaceuticals
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 rifaxigyl 550mg tablet के बारे में (Hindi Summary)

उपयोग: यह दवा रिफैक्सिमिन 550 मिलीग्राम की एक प्रिस्क्रिप्शन टैबलेट है। यह मुख्य रूप से दो स्थितियों के इलाज के लिए इस्तेमाल की जाती है: लिवर की बीमारी वाले मरीजों में हेपेटिक एन्सेफेलोपैथी, जिसमें दिमाग पर असर डालने वाले टॉक्सिन्स को कम करने में मदद मिलती है, और इरिटेबल बाउल सिंड्रोम विद डायरिया (IBS-D), जिसमें पेट फूलना, दर्द और बार-बार दस्त की समस्या कम होती है। यह दवा आंतों में मौजूद हानिकारक बैक्टीरिया को कम करके काम करती है। यह दवा सामान्य सर्दी-जुकाम या अन्य संक्रमणों के लिए नहीं है। इसे डॉक्टर की सलाह के बिना न लें।

साइड इफेक्ट्स: इस दवा को ज्यादातर लोग अच्छी तरह सहन करते हैं, लेकिन कुछ लोगों को हल्की मतली, गैस, पेट फूलना, पेट दर्द, या ढीले दस्त हो सकते हैं। सिरदर्द, चक्कर आना और थकान भी हो सकती है। ये आमतौर पर हल्के होते हैं और कुछ समय में ठीक हो जाते हैं। कभी-कभी गंभीर दस्त, एलर्जी, या लिवर से जुड़ी समस्या हो सकती है। अगर मल में खून, तेज पेट दर्द, आंखों या त्वचा का पीलापन, या चेहरे-होंठों में सूजन दिखे, तो तुरंत डॉक्टर से मिलें।

सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें। इसे पानी के साथ निगलें, चबाएं या तोड़ें नहीं। खाने के साथ या बिना खाने के ले सकते हैं। पूरा कोर्स पूरा करें, भले ही आप बेहतर महसूस करें। शराब न पिएं क्योंकि इससे लिवर की समस्या और साइड इफेक्ट बढ़ सकते हैं। अगर आप गर्भवती हैं, गर्भधारण की योजना बना रही हैं, या स्तनपान करा रही हैं, तो डॉक्टर से सलाह लें। अपनी सभी दवाओं और सप्लीमेंट्स के बारे में डॉक्टर को बताएं।

💡 Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

💊 rifaxigyl 550mg tablet Uses & Benefits

[{"condition":"Hepatic encephalopathy","description":"This medicine is used to reduce the risk of recurrent episodes of hepatic encephalopathy in adults with liver disease by lowering ammonia-producing gut bacteria.","evidence":"Well-established"},{"condition":"Irritable bowel syndrome with diarrhea (IBS-D)","description":"This medicine is used to treat adults with IBS-D to reduce bloating, abdominal pain, and diarrhea by targeting gut bacteria.","evidence":"Well-established"},{"condition":"Travelers' diarrhea","description":"This medicine may be used in some regions for travelers' diarrhea caused by non-invasive bacteria, but this is not its primary approved use in all countries.","evidence":"Moderate"},{"condition":"Small intestinal bacterial overgrowth (SIBO)","description":"This medicine is sometimes used to treat SIBO, a condition where excess bacteria grow in the small intestine, but this use may vary by country and clinical practice.","evidence":"Moderate"}]

Off-label uses: [{"condition":"Diverticular disease","description":"This medicine is sometimes used off-label to reduce symptoms or complications of diverticular disease, but evidence is limited.","evidence":"Limited"},{"condition":"Clostridioides difficile infection","description":"This medicine has been studied off-label for recurrent Clostridioides difficile infection, but it is not a standard first-line treatment.","evidence":"Limited"}]

Primary treatment for: Hepatic encephalopathy

Also treats: Irritable bowel syndrome with diarrhea, Travelers' diarrhea, Small intestinal bacterial overgrowth

📋 Drug Information

Generic Name(s)Rifaximin (550mg)
Brand Namerifaxigyl 550mg tablet
ManufacturerMedley Pharmaceuticals
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassGASTRO INTESTINAL
Action ClassRNA polymerase inhibitors- Rifamycins
Route of AdministrationOral
StorageStore at room temperature between 20°C and 25°C (68°F to 77°F). Keep away from moisture and direct sunlight. Keep in the original container.
Shelf LifeThe shelf life is typically 24 months from the date of manufacture. Check the expiry date on the pack before use.
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 exactly as prescribed by your doctor, at the same times each day.
2
You may take this medicine with or without food, but taking it with food may reduce stomach upset.
3
Do not stop taking this medicine early, even if you feel better, unless your doctor tells you to.
4
Avoid alcohol while taking this medicine, especially if you have liver disease.
5
Tell your doctor about all other medicines you take, especially blood thinners and oral contraceptives.
6
If you develop severe diarrhea, stop the medicine and contact your doctor immediately.
7
Keep all follow-up appointments and lab tests as advised by your doctor.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Confusion or altered mental state in liver disease
This medicine is commonly prescribed for hepatic encephalopathy.
Likely Use
Bloating and diarrhea in IBS
This medicine is used for irritable bowel syndrome with diarrhea.
Likely Use
Fever
This medicine is not a primary fever reducer.
Not Primary
Common cold
This medicine is not effective against viral infections.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is poorly absorbed from the gut into the bloodstream. Only a very small amount, less than 1%, is absorbed after oral intake. Most of the medicine stays in the intestines where it acts.
DistributionBecause this medicine is poorly absorbed, it is distributed mainly within the gastrointestinal tract. Only a small amount reaches the bloodstream and other body tissues.
Protein BindingThis medicine is about 67.5% bound to plasma proteins when it does reach the bloodstream.
MetabolismThis medicine is mainly metabolized in the liver, but because so little is absorbed, the overall metabolism is limited. The exact enzymes involved are not fully established from the available information.
Half-LifeThe elimination half-life of this medicine is approximately 5.6 hours in healthy adults.
ExcretionThis medicine is mainly excreted in the feces, mostly as unchanged medicine. A small amount is excreted in the urine.
BioavailabilityThe oral bioavailability of this medicine is very low, less than 1%, because it is poorly absorbed from the gut.
Onset of ActionThe onset of action depends on the condition being treated. For travelers' diarrhea, improvement may be seen within 1 to 2 days. For hepatic encephalopathy and irritable bowel syndrome with diarrhea, benefits may take days to weeks.
Peak Plasma TimePeak plasma levels of this medicine are reached about 1 hour after taking a dose, but levels are very low due to poor absorption.
Duration of ActionThe duration of action of this medicine depends on the condition and dosing schedule. It is usually taken two to three times daily, and effects last as long as the medicine is present in the gut.

How It Works

This medicine works by binding to bacterial DNA-dependent RNA polymerase in the gut, which stops bacteria from making proteins and causes them to die or stop growing. Because it is poorly absorbed into the bloodstream, its main action stays inside the intestines. This reduces the number of ammonia-producing and other harmful bacteria in the gut, which helps lower toxin levels that can affect brain function in liver disease and reduces bloating and diarrhea in irritable bowel syndrome with diarrhea.

Mechanism Steps

1
Entry into the gut: This medicine is taken by mouth and travels through the stomach into the small and large intestines without being significantly absorbed into the bloodstream.
2
Binding to bacterial enzyme: Inside the gut, this medicine binds to a bacterial enzyme called DNA-dependent RNA polymerase, which bacteria need to make proteins.
3
Blocking protein production: By binding to this enzyme, this medicine stops bacteria from producing essential proteins, which prevents them from growing and causes them to die.
4
Reduction of harmful bacteria: This leads to a fall in the number of ammonia-producing and other harmful bacteria in the intestines.
5
Clinical benefit: Lower bacterial toxin production helps reduce hepatic encephalopathy episodes in liver disease and improves bloating and diarrhea in irritable bowel syndrome with diarrhea.

💡 How to Take rifaxigyl 550mg tablet

Strength: This medicine is available as an immediate-release oral tablet containing 550 mg of rifaximin.

1Take this medicine by mouth exactly as prescribed by your doctor.
2Swallow the tablet whole with a glass of water.
3You may take it with or without food.
4Do not crush, chew, or break the tablet unless your doctor tells you to.
5Take it at the same times each day to maintain steady levels.
6If you miss a dose, follow the missed dose instructions.
7Do not stop taking this medicine without talking to your doctor first.

Dosage Information

Adult DosageFor hepatic encephalopathy, the usual adult dose is 550 mg taken by mouth twice daily. For irritable bowel syndrome with diarrhea, the usual adult dose is 550 mg taken by mouth three times daily for 14 days. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not change the dose without medical advice.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageNo specific dose adjustment is required for elderly patients based on age alone. However, because elderly patients may have reduced liver or kidney function, dose must be individualized by a qualified clinician.
Renal ImpairmentNo dose adjustment is usually needed for patients with kidney problems because this medicine is poorly absorbed. However, consult your doctor if you have severe kidney disease.
Hepatic ImpairmentNo dose adjustment is needed for mild to moderate liver disease. In severe liver disease, use with caution and only under medical supervision. Dose must be individualized by a qualified clinician.
Maximum Daily DoseThe maximum recommended daily dose is 1650 mg (550 mg three times daily) for irritable bowel syndrome with diarrhea. For hepatic encephalopathy, the maximum is 1100 mg (550 mg twice daily). Do not exceed the dose prescribed by your doctor.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
May take with or without food
Food does not significantly affect absorption.
Grapefruit
No known significant interaction
This medicine is poorly absorbed, so grapefruit is unlikely to affect it.
Alcohol
Avoid
Alcohol can worsen liver problems and increase 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 rifaxigyl 550mg tablet

✅ Common Side Effects

Nausea (Common (up to 5%))
Take with food and drink plenty of fluids. If it persists, talk to your doctor.
Gas or bloating (Common (up to 5%))
Usually settles with continued use. Avoid gas-producing foods if bothersome.
Abdominal pain (Common (up to 5%))
Take with meals and avoid spicy foods. Consult your doctor if pain is severe.
Headache (Common (up to 5%))
Rest and stay hydrated. Use a mild pain reliever only if your doctor approves.
Tiredness (Common (up to 5%))
Get adequate rest. If tiredness is severe or persistent, contact your doctor.

🚨 Serious Side Effects

Severe diarrhea (Rare (<0.1%))
Seek immediate medical attention if diarrhea is severe, bloody, or accompanied by dehydration.
Allergic reaction (Rare (<0.1%))
Stop the medicine and get emergency help if you notice rash, swelling of face or throat, or difficulty breathing.
Liver problems (Rare (<0.1%))
Report yellowing of eyes or skin, dark urine, or severe tiredness to your doctor immediately.
Severe abdominal pain (Rare (<0.1%))
Seek urgent medical care if you have severe or worsening stomach pain.

⚠️ Rare Side Effects

Blood in stool
Seek immediate medical attention.
Fever with chills
Contact your doctor right away.
Chest pain
Get emergency medical help.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major
Oral contraceptives Major
Antacids Moderate
P-glycoprotein inhibitors Moderate
Activated charcoal Minor

🚨 Major Interactions

  • Warfarin
  • Oral contraceptives

⚡ Moderate Interactions

  • Antacids
  • P-glycoprotein inhibitors

🍷 Alcohol Interaction

Alcohol should be avoided while taking this medicine, especially if you have liver disease. Alcohol can worsen liver problems and increase the risk of side effects such as dizziness and stomach upset. If you drink alcohol regularly, talk to your doctor about safe limits.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Allergy to rifaximin or any other rifamycin antibiotics","Severe liver disease with liver failure, unless specifically advised by a doctor","Children under 12 years for IBS-D, unless prescribed by a doctor","Use in patients with a history of severe allergic reactions to similar antibiotics"]

⚠️ Warnings & Precautions

["This medicine should not be used for viral infections such as colds or flu.","Do not use this medicine for longer than prescribed without medical advice.","Tell your doctor if you have liver disease, kidney disease, or any other medical condition.","Avoid alcohol while taking this medicine.","If you develop severe diarrhea, stop the medicine and contact your doctor.","This medicine may reduce the effectiveness of oral contraceptives; use backup contraception.","Keep out of reach of children."]

🤱 Lactation Safety

It is not known whether this medicine passes into breast milk. Because many medicines do pass into breast milk, caution is advised when used by a breastfeeding mother. Consult your doctor before using this medicine while breastfeeding.

💊 Overdose Management

There is no specific antidote for an overdose of this medicine. Because it is poorly absorbed, serious overdose effects are unlikely. If you suspect an overdose, contact your doctor or a poison control center immediately. Treatment is supportive and based on symptoms.

⏰ 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 the same time to make up for a missed dose.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor, usually by mouth with or without food. Do not crush, chew, or break the tablet unless your doctor tells you to. Complete the full course as advised, even if you feel better after a few days. Do not use this medicine for a condition for which it was not prescribed, and never share it with others. Tell your doctor about all other medicines, supplements, and herbal products you take, especially blood thinners, antibiotics, and medicines for liver or stomach problems. Avoid alcohol while taking this medicine because it can worsen liver problems and increase side effects. If you are pregnant, planning pregnancy, or breastfeeding, talk to your doctor before using this medicine. Keep all follow-up appointments and lab tests as advised by your doctor.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more sensitive to the side effects of this medicine, such as dizziness and tiredness. No specific dose adjustment is required based on age alone, but dose must be individualized by a qualified clinician based on liver and kidney function.

🤰 Pregnancy Planning (TTC)

If you are planning pregnancy, talk to your doctor before taking this medicine. This medicine is Pregnancy Category C and should be used during pregnancy only if clearly needed. Discuss the risks and benefits with your doctor.

🏥 Post-Surgery Considerations

If you are scheduled for surgery, inform your surgeon and anesthesiologist that you are taking this medicine. There are no specific restrictions, but your doctor may advise you to stop it temporarily before surgery.

🦷 Dental Procedures

Inform your dentist that you are taking this medicine before any dental procedure. There are no specific interactions with dental anesthetics, but it is important for your dentist to know your full medication list.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight to reduce stress on your liver and gut.
🥗
Eat a balanced diet rich in fiber, fruits, and vegetables.
😴
Stay well hydrated throughout the day.
💧
Avoid alcohol and smoking.
🧘
Manage stress through relaxation techniques like yoga or meditation.
🌞
Get regular exercise as advised by your doctor.
🚭
Follow your doctor's advice for managing your underlying condition.

🏋️ Exercise Considerations

This medicine may cause dizziness or tiredness in some people. Avoid heavy exercise or operating machinery if you feel unwell. Light to moderate exercise is usually safe, but consult your doctor before starting any new exercise routine.

🥗 Diet Recommendations

Include plenty of fiber-rich foods like whole grains, fruits, and vegetables.
Limit processed and high-fat foods.
Avoid alcohol completely.
Stay well hydrated with water and clear fluids.
If you have liver disease, follow a low-sodium diet as advised by your doctor.

💼 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. Most people can continue their normal daily activities, but listen to your body and rest when needed.

🛑 When to Stop This Medicine

Do not stop taking this medicine without talking to your doctor. For IBS-D, the usual course is 14 days. For hepatic encephalopathy, it may be continued long-term as prescribed. If you experience severe side effects, contact your doctor immediately.

📅 Long-Term Use Effects

Long-term use of this medicine may be prescribed for hepatic encephalopathy to prevent recurrent episodes. It is generally well tolerated, but regular monitoring of liver function and blood ammonia levels is advised. For IBS-D, it is usually used for a short 14-day course. Long-term use should be discussed with your doctor, and any new or worsening symptoms should be reported.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Lactulose

A non-absorbable sugar used to treat hepatic encephalopathy by lowering ammonia levels.

Evidence: Well-established
Dietary changes

For IBS-D, a low-FODMAP diet may help reduce bloating and diarrhea.

Evidence: Moderate
Probiotics

May help restore healthy gut bacteria, but evidence is mixed.

Evidence: Limited

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

There are no known interactions between this medicine and vaccines. However, if you are scheduled for any vaccination, inform your doctor that you are taking this medicine.

📦 Storage Guide

✅ DO

Store at room temperature between 20°C and 25°C

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in the original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight and moisture

❌ DON'T

Do not store in the bathroom cabinet

✅ DO

Keep out of reach of children

❌ DON'T

Do not use after the expiry date

✈️ Traveling with This Medicine

When traveling, carry this medicine in its original packaging with a copy of your prescription. Keep it in your hand luggage to avoid loss or temperature changes. Store at room temperature and avoid extreme heat or cold. If you are crossing time zones, continue taking your doses at the same intervals as prescribed. Check customs rules for carrying prescription medicines in your destination country.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 58-year-old man with liver cirrhosis and recurrent confusion
He was prescribed this medicine 550 mg twice daily for hepatic encephalopathy. After a few weeks, his episodes of confusion became less frequent, and his family noticed he was more alert. He also took lactulose as advised and kept his follow-up appointments.
💡 Lesson: Taking this medicine regularly and following up with your doctor can help reduce episodes of confusion in liver disease.
👤 A 34-year-old woman with irritable bowel syndrome and frequent diarrhea
She had bloating and loose stools for years. Her doctor prescribed this medicine 550 mg three times daily for 14 days. By the end of the course, her bloating and diarrhea had improved significantly. She also made dietary changes and managed stress better.
💡 Lesson: A short course of this medicine can improve IBS-D symptoms, but lifestyle and diet changes are also important for long-term relief.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: For travelers' diarrhea, improvement may be seen within 1 to 2 days. For hepatic encephalopathy and IBS-D, benefits may take days to weeks. Follow your doctor's advice.

Q: Can I take this medicine with food?

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

Q: What should I do if I miss a dose?

A: 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 dose.

Q: Is this medicine safe during pregnancy?

A: This medicine is Pregnancy Category C. It should be used during pregnancy only if the potential benefit justifies the potential risk. Consult your doctor before use.

Q: Can I drink alcohol while taking this medicine?

A: It is best to avoid alcohol while taking this medicine, especially if you have liver disease. Alcohol can worsen liver problems and increase side effects.

🤔 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?
  • Is it safe during pregnancy?
  • Does it affect my birth control pills?

🔄 Substitutes for rifaxigyl 550mg 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 is a general antibiotic for any infection.
    Fact: This medicine is a non-absorbable antibiotic that acts mainly in the gut. It is not used for infections elsewhere in the body.
  • Myth: This medicine can be taken for a common cold or flu.
    Fact: This medicine is not effective against viral infections such as colds or flu.
  • Myth: This medicine is safe to take without a prescription.
    Fact: This medicine is a prescription medicine and should only be taken under a doctor's supervision.
  • Myth: This medicine can be stopped as soon as you feel better.
    Fact: You should complete the full course as prescribed by your doctor, even if you feel better.

🔄 Alternative Options

Generic Alternatives

  • Rifaximin 550 mg tablet

Brand Alternatives

  • Rifagut 550 Tablet

📊 Comparison with Similar Medicines

[{"medicine":"Rifaximin","class":"Non-absorbable antibiotic","main_use":"Hepatic encephalopathy, IBS-D","absorption":"Poorly absorbed","common_side_effects":"Nausea, gas, headache"},{"medicine":"Lactulose","class":"Osmotic laxative","main_use":"Hepatic encephalopathy, constipation","absorption":"Not absorbed","common_side_effects":"Bloating, gas, diarrhea"},{"medicine":"Neomycin","class":"Aminoglycoside antibiotic","main_use":"Hepatic encephalopathy","absorption":"Poorly absorbed","common_side_effects":"Kidney damage, hearing loss"}]

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