Rifaximin 400 mg | RIFAXIKEM-400
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Manufactured By Steris Healthcare Pvt Ltd
Composition Rifaximin 400 mg
Rs 196.22
MRP Rs 280.31
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( For 10 Tablet )
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Description:
Rifaximin 400 mg is a gut-targeted antibiotic used to treat infectious diarrhea, irritable bowel syndrome with diarrhea (IBS-D), and small intestinal bacterial overgrowth (SIBO). It acts locally in the gut with minimal absorption into the bloodstream, which limits systemic side effects. Always take it exactly as prescribed by your doctor.
What Is Rifaximin 400 mg?
Rifaximin 400 mg is a gut-selective, non-systemic antibiotic tablet prescribed to manage bacterial overgrowth and related digestive conditions. Unlike many antibiotics that circulate through the entire body, Rifaximin stays largely confined to the gastrointestinal tract, where it targets harmful bacteria directly at the site of infection. This localized action is why doctors often prefer it for conditions like traveler's diarrhea and recurrent hepatic encephalopathy, where reducing gut bacterial load matters more than treating a body-wide infection.
How Rifaximin Works
Rifaximin works by inhibiting bacterial RNA synthesis, which stops harmful bacteria in the gut from multiplying.
- Binds to bacterial RNA polymerase – blocks the enzyme bacteria need to produce proteins
- Halts bacterial growth – prevents reproduction of E. coli and other gut pathogens
- Stays local to the gut – minimal systemic absorption reduces whole-body drug exposure
- Reduces ammonia-producing bacteria – lowers blood ammonia levels, helpful in liver-related conditions
- Restores gut balance – supports normal bowel function as harmful bacteria are cleared
Clinical Indications
| Condition | How Rifaximin Helps |
|---|---|
| Traveler's diarrhea (non-invasive E. coli) | Reduces bacterial load causing diarrhea |
| Hepatic encephalopathy | Lowers ammonia-producing gut bacteria |
| Irritable Bowel Syndrome with Diarrhea (IBS-D) | Eases bloating, discomfort, and loose stools |
| Small Intestinal Bacterial Overgrowth (SIBO) | Reduces excess bacteria in the small intestine |
Dosage Guidelines
| Condition | Typical Adult Dose | Duration |
|---|---|---|
| Traveler's diarrhea | 400mg, 2–3 times daily | 3 days |
| Hepatic encephalopathy | 400mg, 2–3 times daily | Long-term, as advised |
| IBS-D | 400mg, 3 times daily | 14 days (may repeat if advised) |
Key Benefits
- Targets gut bacteria directly with limited systemic drug exposure
- Well-tolerated for repeat or long-term use in hepatic encephalopathy
- Fast-acting for short-course traveler's diarrhea treatment
- Low likelihood of significant drug interactions due to minimal absorption
Precautions
- Inform your doctor if you have severe liver disease or are pregnant/breastfeeding
- Not effective against diarrhea caused by invasive bacteria with fever or bloody stools
- Complete the full prescribed course even if symptoms improve early
- Avoid self-medicating for recurring digestive symptoms without a diagnosis
Common Side Effects
- Nausea
- Headache
- Abdominal discomfort
- Mild dizziness
Serious Side Effects
- Signs of severe allergic reaction (rash, swelling, breathing difficulty)
- Persistent or worsening diarrhea
- Signs of liver dysfunction (yellowing of skin/eyes, dark urine)
Rifaximin vs Other Gut-Acting Antibiotics
| Feature | Rifaximin | Metronidazole | Ciprofloxacin |
|---|---|---|---|
| Systemic absorption | Minimal | Moderate | High |
| Used for hepatic encephalopathy | Yes | No | No |
| Common for traveler's diarrhea | Yes | Occasionally | Yes |
| Typical course length | 3–14 days | 5–7 days | 3–5 days |
Key Statistics
| Statistic | Detail | Source |
|---|---|---|
| Systemic absorption rate | Less than 1% reaches the bloodstream | Manufacturer prescribing information |
| Hepatic encephalopathy recurrence reduction | Significant reduction in recurrence episodes vs placebo in clinical trials | Peer-reviewed hepatology literature |
| Traveler's diarrhea resolution | Majority of non-invasive cases resolve within 3 days of treatment | Clinical trial data |
Conclusion
Rifaximin 400 mg offers a targeted, gut-focused approach to managing traveler's diarrhea, hepatic encephalopathy, and IBS-D, with the added advantage of minimal systemic absorption compared to conventional antibiotics. Its localized action makes it a preferred choice for patients needing repeated or longer-term therapy, particularly in liver-related conditions. As with any prescription antibiotic, correct diagnosis, appropriate dosing, and doctor supervision are essential for safe and effective use. If you're experiencing persistent digestive symptoms, consult your doctor to determine if Rifaximin 400 mg is right for you.
Price – Prescription only – consult your doctor.
Frequently Asked Questions
What is Rifaximin 400 mg used for?
Rifaximin 400 mg is used to treat traveler's diarrhea, hepatic encephalopathy, and IBS-D by reducing harmful bacteria in the gut.
Is Rifaximin an antibiotic that affects the whole body?
No. Rifaximin acts mainly within the gut, with minimal absorption into the bloodstream, so its effects stay largely localized.
How long does it take for Rifaximin to work?
Many patients notice improvement in traveler's diarrhea symptoms within 24–48 hours of starting treatment, though the full course should be completed.
Can I take Rifaximin without a prescription?
No. Rifaximin 400 mg is a Schedule H prescription medicine in India and must only be used under medical supervision.
Does Rifaximin help with IBS?
Yes, Rifaximin is prescribed for IBS with diarrhea (IBS-D) to reduce bloating, discomfort, and stool frequency.
What should I avoid while taking Rifaximin?
Avoid self-adjusting your dose, skipping doses, or stopping early even if symptoms improve, unless advised by your doctor.
Is Rifaximin safe for long-term use?
It is often used long-term for hepatic encephalopathy under a doctor's supervision, given its low systemic absorption profile.
Brand name: RIFAXIKEM 400 (STERIS HEALTHCARE PVT LTD)
Composition Name: Rifaximin 400 mg
Formulation: Tablet
Pack size: 10 × 10 Tablets
Marketed By: Steris Healthcare Pvt Ltd
Regulatory standard: WHO-GMP Certified
Schedule: Valid Prescription Required (Prescription Only)
