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  • US Name:


  • Israeli Names:

    Lormyx, Hepazec

  • Active Ingredients:


  • Brand Manufacturer:

    ILKO (550 mg Xifaxan)

  • Manufacturer Location:

    Italy (Lormyx), Turkey (Hepazec)


Xifaxan is an antibiotic that fights bacterial infection in the intestine.

Prescription Required
56 Tablets
12 Tablets
*Please note all prices are in US dollars

Hepazec: 550 mg dose

Lormyx: 200 mg dose

Xifaxan/Lormyx/Hepazec (Rifaximin) is used for the the treatment of digestive system infections caused by bacteria. This infection originates from the Escherichia coli, a kind of bacteria that lives in the intestines. While the bacteria are harmless and keep the digestive tract healthy, they trigger an infection when a person eats contaminated food or drinks contaminated water.

Xifaxan/Lormyx/Hepazec (Rifaximin) is typically prescribed for:

  • Traveler’s diarrhea (TD)
  • Damage to the function of the brain due to chronic liver disease
  • Non-complicated diverticular disease
  • SIBO – for now, the primary antibiotic used is Xifaxan. Research indicates that Xifaxan can be quite effective in treating SIBO, with a large majority of patients benefiting from the treatment. Xifaxan has been shown to eradicate a variety of strains of bacteria.

Reported side effects include: 

  • Black tarry stools
  • Dizziness
  • Muscle spasm
  • Rapid breathing
  • Shortness of breath
  • Inability to sleep

Less common

  • Blood in the urine
  • Bloody nose
  • Chest pain
  • Fainting
  • Strange noises in the ears
  • Weakness
  • Ulcers
  • Sores
  • Sunken eyes

Consult your doctor if you experience any of these side effects.

Xifaxan is the name given to the 550 mg dose. Lorymx is the name of the 220 mg dose.

Xifaxan works differently than other antibiotics and goes through the stomach into the intestines without getting absorbed into the bloodstream. It kills bacteria and/or stops their future growth.

Xifaxan also treats irritable bowel syndrome (IBS). In addition, it helps to treat hepatic encephalopathy, a brain problem caused by improper liver function. The drug has been proven to minimize the risk of further brain impairment in people with this liver defect.

Xifaxan requires a prescription and is intended for use in adults and adolescents over 12 years of age. Please follow your doctors instructions when taking this and any medication.

  • Can rifaximin stop diarrhea?

    Xifaxan(rifaximin) is an antibiotic used to treat traveler's diarrhea which is caused by the Escherichia coli bacteria. It can be prescribed to treat IBS (irritable bowel syndrome) accompanied by diarrhea and reduce the risk of a recurrence of hepatic encephalopathy, a condition that occurs when the liver does not work normally.
  • Should I take probiotics with rifaximin?

    Doctors often suggest that patients follow a course of antibiotics with probiotics, particularly for conditions such as SIBO and infections from H. Pylori. Probiotics can also help to reduce side effects like diarrhea that are associated with antibiotics.
  • Does rifaximin reduce inflammation?

    Clinical studies have shown that rifaximin is beneficial in the treatment of IBS. Rifaximin alters the bacterial population in the ileum, leading to an abundance of Lactobacillus. This prevents gut inflammation and reduces pain sensation in response to gastrointestinal sensory stimuli.
  • Are bananas good for IBS?

    FODMAPS (fermentable oligosaccharides, disaccharides, monosaccharides and polyols) are short-chain carbohydrates (sugars) that are absorbed poorly in some people. This can lead to digestive distress, cramping or diarrhea. Unripe bananas are low in FODMAPS, making them a better choice for people with IBS.
  • How fast does rifaximin work for SIBO?

    Small intestinal bacterial overgrowth (SIBO) is a condition caused by the presence of excessive bacteria in the small intestine. It frequently causes chronic diarrhea and malabsorption of food. Rifaximin is the most widely prescribed antibiotic for SIBO, succeeding in roughly one-half of cases in one week. Doctors frequently prescribe Xifaxan in combination with another antibiotic, neomycin. Together, they have been shown to be effective in almost 85% of cases after ten days.


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