RIFAXA TAB 550MG: Rifaxa is an antibiotic (rifaximin) used for gastrointestinal infections and related conditions. Uses: Treats travelers diarrhea, irritable bowel syndrome with diarrhea (IBS D), and hepatic encephalopathy. Benefits: Targets gut bacteria without affecting normal flora, improves bowel function, and reduces infection symptoms. Side Effects: Nausea, bloating, constipation, or rare allergic reactions.