Serving the Santa Clarita Valley since 2005

You can order Xifaxan here:


200mg 30 tablets
$ 59.95
$ 2.00 Per tablet
200mg 60 tablets
$ 104.95
$ 1.75 Per tablet
200mg 90 tablets
$ 134.95
$ 1.50 Per tablet
200mg 180 tablets
$ 224.95
$ 1.25 Per tablet
  • + Free AirMail shipping


400mg 30 tablets
$ 89.95
$ 3.00 Per tablet
400mg 60 tablets
$ 159.95
$ 2.67 Per tablet
  • + Free AirMail shipping
400mg 90 tablets
$ 224.95
$ 2.50 Per tablet
  • + Free AirMail shipping
400mg 180 tablets
$ 419.95
$ 2.33 Per tablet
  • + Free AirMail shipping

Generic Xifaxan 550 mg Tablet

Antibiotic Xifaxan (rifaximin) treats colon bacterial infections. It inhibits these illnesses' microorganisms. The drug treats E. coli-induced travelers' diarrhea and irritable bowel syndrome with diarrhea (IBS-D). Xifaxan is available as a tablet, with the most frequent dosage being 550 mg.

What is Xifaxan and Rifaximin?

Rifaximin, a kind of antibiotic, is marketed under the trade name Xifaxan. The oral drug rifaximin works by eradicating germs and is absorbed by the stomach. It is used to treat IBS with diarrhea, travelers' diarrhea brought on by E. coli, and small intestine bacterial overgrowth (SIBO) (IBS-D).

Rifaximin Side Effects

Xifaxan (rifaximin), like any medication, may have negative effects. Most frequent side effects:

  • Headache
  • Dizziness
  • Tiredness
  • Nausea
  • Constipation
  • Stomach discomfort

Hives, breathing issues, and face, lip, tongue, or neck swelling are uncommon allergic symptoms. Stop taking the drug and visit a doctor if these side effects occur.

Rifaximin Mechanism

Rifamycin antibiotics include rifaximin. Binding to the beta subunit of bacterial RNA polymerase inhibits RNA synthesis. This disrupts protein synthesis and kills bacteria.

Rifaximin is poorly absorbed in the gastrointestinal tract, therefore it targets gut bacteria rather than systemic bacteria like other antibiotics. Rifaximin destroys gastrointestinal bacteria, treating traveler's diarrhea, SIBO, and hepatic encephalopathy.

Rifaximin only kills bacteria—not viruses or fungus. It also targets just certain bacteria and does not influence the intestinal flora. This makes it a good antibiotic for gut infections without harming gut microorganisms.

author: Tony Olivier, Pharm D.

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