Rifaximin is a prescription medicine. It is primarily used for the treatment of Hepatic Encephalopathy. The alternative uses of Rifaximin have also been explained below. Medical history of the patient along with age and gender determines the dosage of Rifaximin . Individual symptoms and route of administration also determines the right dosage . This information has been provided in detail in the dosage section. The side effects typically associated with Rifaximin include Flatulence, Bloating ... Rifaximin is a Rifamycin-based non-systemic antibiotic belonging to Gastrointestinal agent. Rifaximin is a rifamycin-based non-systemic antibiotic used for the treatment of gastrointestinal bacterial infections, such as traveler's diarrhea and irritable bowel syndrome, and reduction of overt hepatic ... Rifaximin Tablets Rifaximin is an antibiotic that treats diarrhea caused by traveling or irritable bowel syndrome. It can also prevent a brain condition that can occur with severe liver disease. This medication comes in a tablet form that you can take by mouth with a glass of water. The brand name of this medication is Xifaxan ®.