Rifaximin is an antibiotic primarily used to treat gastrointestinal infections. It works by inhibiting the growth of bacteria in the intestines, making it effective against conditions like traveler's diarrhea and irritable bowel syndrome with diarrhea. Unlike many antibiotics, Rifaximin is minimally absorbed into the bloodstream, which helps reduce the risk of systemic side effects. This medication is often prescribed for short-term use and is generally well-tolerated. Patients may experience mild side effects, such as nausea or headache, but serious reactions are rare. Rifaximin's unique properties make it a valuable option for managing specific intestinal infections.