Rcifax

📦 Každá objednávka je pokryta naší Zárukou opětovného odeslání — pokud vaše zásilka nedorazí do 20 pracovních dnů, přeposíláme ji.

Proč objednávat z MedsBase

Naše generické léky pocházejí od výrobců certifikovaných WHO-GMP a jsou expedovány po celém světě v diskrétním, nenápadném balení – na vnější straně balíku není uveden název léku. Platby kartou jsou směrovány prostřednictvím regulovaného procesoru (popisky na výpisu zahrnují regulovaného procesora plateb kartou – nikdy “MedsBase” nebo název léku). Přijímáme také kryptoměny a bankovní převody SEPA. Každá objednávka je zajištěna naší politikou přeposlání.

Proč objednávat z MedsBase

Rcifax is supplied from a výrobce certifikovaného WHO-GMP. Every order ships discreetly worldwide and is covered by our Zárukou opětovného odeslání — if it does not arrive within 20 business days, we reship at no cost. Rifaximin is endorsed by AASLD 2021 for hepatic encephalopathy prevention and by ACG 2021 for traveller’s diarrhoea and IBS-D — one of the few antibiotics with strong evidence in functional GI disorders.

Mechanism

Rifaximin binds the β-subunit of bacterial DNA-dependent RNA polymerase (rpoB), inhibiting bacterial RNA synthesis. Spectrum covers Gram-positive and Gram-negative aerobes and anaerobes including E. coli, Shigella, Salmonella, Campylobacter, and many enteric anaerobes. Because absorption is < 0.4 percent of the oral dose, the drug acts effectively only on intra-luminal organisms.

Indications & doses

When it is NOT the right drug

• Invasive enteric infection (fever, bloody stool, severe systemic illness) — needs ciprofloxacin or azithromycin systemically.
• Pseudomembranous colitis (C. difficile) — oral vancomycin or fidaxomicin is first-line; rifaximin has limited evidence as a relapse-prevention adjunct.
• Suspected typhoid — needs systemic antibiotic.
• Suspected appendicitis / cholangitis / pyelonephritis — needs systemic.

Vedlejší účinky

• Gastrointestinal: nausea, abdominal pain, flatulence (mostly mild)
• Headache, dizziness
• Peripheral oedema (with HE-prevention long courses)
• C. difficile-associated diarrhoea (rare; the gut-selective profile reduces but does not eliminate this risk)
• Hypersensitivity reactions (rare): rash, urticaria, anaphylaxis
• Cross-reactivity with rifampicin/rifabutin in patients with rifamycin allergy

Interakce léků

Rifaximin’s very low systemic absorption means clinically significant interactions are unusual. However:

• P-gp inhibitors (cyclosporin) raise the small absorbed fraction.
• Warfarin: isolated reports of INR change — check INR if used concurrently.
• Combined OC pill: oral contraceptive efficacy is theoretically reduced if rifaximin causes severe diarrhoea (transit time effect).

Často kladené dotazy

How quickly does it work in traveller’s diarrhoea?

Symptom improvement is usually within 24–48 hours. The 3-day course is sufficient for non-invasive E. coli, the most common cause. If symptoms are severe (fever, bloody stool) or do not improve in 48 hours, change to systemic antibiotic.

Does it cure IBS?

No. Rifaximin reduces IBS-D symptoms in about 40 percent of patients; benefit lasts 10–12 weeks. It can be repeated if symptoms recur. It is not a cure but a useful symptomatic intervention.

Why do I need lactulose with it for hepatic encephalopathy?

Lactulose acidifies the colon and ion-traps ammonia. Rifaximin reduces ammonia-producing bacteria. The two work synergistically; combination therapy reduces HE recurrence by ~60 percent versus lactulose alone.

Can I drink alcohol on it?

There is no disulfiram-like interaction. However, traveller’s diarrhoea recovery and HE prevention both benefit from minimal alcohol intake.

Is it safe in pregnancy?

Category C. Used in pregnancy when the indication justifies it (HE in pregnant cirrhotic) under specialist advice. Discuss with obstetric prescriber.

How is it different from rifampicin?

Same drug-class binding target but rifampicin is highly absorbed (oral bioavailability ~90 percent) and used systemically for tuberculosis, leprosy, and meningococcal prophylaxis — with significant CYP3A4/2C19 induction and CYP-driven interactions. Rifaximin is gut-restricted with negligible systemic effect.

Will it disrupt my normal gut bacteria?

Yes, but transiently. The gut microbiome typically recovers within 2–4 weeks. Probiotics during and after the course may shorten recovery (modest evidence).

Is resistance a concern?

Rifaximin resistance can develop in enteric bacteria with repeated courses but the impact on systemic rifamycin use (rifampicin for TB, rifabutin for HIV) is limited because rifaximin is not used systemically. Still, avoid casual repeat courses.

Skladování

Below 30°C, dry place. Keep blister sealed until use.

Co když vynechám dávku?

Take it as soon as you remember unless close to the next dose. Do not double up. Try to keep the schedule consistent.

Other Gastro Health Medications

• Rifagut — Rifaximin (alternate brand)
• Ciplox — Ciprofloxacin (systemic option for invasive enteric infection)
• Synclar — Clarithromycin (H. pylori)
• Cendox — Doxycycline
• Colospa — Mebeverine (IBS antispasmodic)
• Browse all Gastro Health Medications

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