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Medical Specialists® UK Pharmacy
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Buy Xifaxanta

buy xifaxanta


(Rifaximin 200mg)

Prices from as little as £2.05* a tablet

(*based on private prescription)

Next......Easy 4 step process to obtain this medication in consultation with our in-house prescriber.



Private Prescription


Product Details
Side Effects & Warnings
Product Reviews

What is it used for?

Xifaxanta tablets contain the active ingredient rifaximin, which is a type of medicine called a rifamycin antibiotic. This prescription drug is used to treat infections in the intestine.

This antibiotic acts locally in the intestine and is not absorbed into the bloodstream. It remains 99% within the gut and has few systemic side-effects and few interactions or contraindications. It works by targeting and inactivating a bacterial enzyme called RNA-polymerase. The bacteria use RNA-polymerase to make essential proteins and to copy their own genetic information (DNA). Without this enzyme the bacteria cannot reproduce and they die.

Travellers' Diarrhoea is a stomach and intestinal infection that occurs as a result of unsanitary handling of food. Traveller’s diarrhoea is caused by consuming food or water that has been contaminated by bacteria, viruses or parasites. For further information on prevention and treatment etc please visit NHS Fit for Travel

Irritable Bowel Syndrome (IBS) / SIBO - Clinical trials and published medical papers have shown that rifaximin is effective in treating IBS. Please click here to see the medical details and recommended dosage.
Although this medication is licensed for the treatment of IBS by the FDA, it is not licensed in the UK.

Small intestinal bacterial overgrowth (SIBO)

Small intestinal bacterial overgrowth is a disorder of excessive bacterial growth in the small intestine. Unlike the colon (or large bowel), which is rich with bacteria, the small bowel usually has fewer than 104 organisms per millilitre. Patients with bacterial overgrowth typically develop symptoms including nausea, bloating, vomiting, diarrhoea, malnutrition, weight loss and malabsorption.

How to use?

Travellers' Diarrhoea - Xifaxanta tablets can be taken with or without food. They should be swallowed with a glass of water. The usual dose of Xifaxanta tablets is one tablet to be taken every eight hours for three days (a total of nine doses). You should complete this course even if your symptoms improve.

Irritable Bowel Syndrome (IBS) / SIBO - Clinical trials and published medical papers have shown that rifaximin is effective in treating IBS. Please click here to see the medical details and recommended dosage.

This medication is not for IBS /SIBO with constipation. Please click here to see the relevant medication for IBS / SIBO with constipation.

Please note: Abdominal pain, nausea, vomiting, flatulence, diarrhoea, dyspnoea, headache, depression, dizziness, muscle spasm, rash, pruritus can be common Side Effects of this drug.

Not to be used in:

  • People with an allergy to any rifamycin antibiotics such as rifampicin or rifabutin.
  • People with diarrhoea containing blood, or who also have a fever.
  • People who have experienced eight or more unformed or liquid stools in the previous 24 hours.
  • Children and adolescents under 18 years old.

This medicine should not be used if you are allergic to any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy.

If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.

Where can I buy online?

You can buy Xifaxanta online with or without a prescription at Medical Specialists pharmacy, after completing a simple online consultation. Just complete an online consultation by clicking the orange button above.

Phamarmacy Team

Ask Our Prescriber / Pharmacist

Medical Specialists® are proud of our in-house team of Prescribers, Pharmacists and Experts who carry out the online consultations, dispense medication or help our patients in other ways.

If you would like to ask one of our experts any questions regarding your medication or any other matter, then please feel free to submit your query to us and will get back to you.

Ask the Pharmacist

For full patient information, please read or print out the leaflet provided at the bottom of this page about Xifaxanta tablets.


This patient information leaflet is provided for information purposes only. This leaflet information should not be used in contradiction with your Doctor or Pharmacist's advice. Medical Specialists recommend that you carefully read the information leaflet provided with your medication.  Medical Specialists will not accept liability for information displayed. Please refer to the leaflet provided with your medication for the latest manufacturer's information.

How We Package Your Order

Your medication is sealed in a plain shipping box for protection then placed inside a tamper-proof Royal Mail special delivery envelope before being dispatched from our in-house Pharmacy.

  • Discreet Plain Packaging
  • Royal Mail Special Delivery
  • No Mention of Medication

Secure payment through Sagepay

  • Est.1994, first online Prescribers in 2001
  • Now the UK’s first One Stop Online Pharmacy
  • Genuine branded medication
  • 100% secure online payment
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