1. An agent for preventing and / or treating a functional disorder of the gastrointestinal tract that contains rifaximin as an effective ingredient. ! 2. The tool according to claim 1, where the functional disorder of the gastrointestinal tract is a disease selected from the group consisting of a functional disorder of the esophagus, functional gastroduodenal disorder, functional intestinal disorder, functional abdominal pain syndrome, functional disorder of the gallbladder and sphincter of Oddi, functional anorectal disorder, functional disorder in infants and toddlers, and functional disorder in de tei and teenagers. ! 3. The tool according to claim 1 or 2, where the functional disorder of the gastrointestinal tract is a disease selected from the group consisting of functional dyspepsia, functional flatulence, functional diarrhea, functional fecal incontinence, functional anorectal pain, functional defecation disorder, functional diarrhea of infants, functional abdominal pain in children and uncontrolled fecal incontinence in children. ! 4. The tool according to claim 3, where the functional disorder of the gastrointestinal tract is a functional dyspepsia with abnormal functioning of the intestine. ! 5. The tool according to claim 4, where the abnormal functioning of the intestine is abdominal pain, diarrhea or constipation. ! 6. The tool according to claim 3, reducing the number of bowel movements. ! 7. The tool according to claim 3, normalizing the nature of the chair. ! 8. The tool according to claim 1, which improves motor activity1. Средство для предотвращения и/или лечения функционального расстройства желудочно-кишечного тракта, которое содержит в качестве эффективного ингредиента рифаксимин. ! 2. Средство по п.1, где функциональное расстройство желудочно-кишечного тракта представляет собой заболевание, выбранное из группы, состоящей из функционального расстройства пищевода, функционального гастродуоденального расстройства, функционального расстройства кише
