Intestinal dysbiosis is a violation of the quantitative and qualitative composition of the intestinal microflora, which is most often accompanied by certain clinical symptoms. It should be noted, that the terms "dysbacteriosis" and "intestinal dysbiosis" are used only in the domestic medical literature while in foreign sources other terms are used to refer to the same inherently state, such as "antibiotic-associated diarrhea" and "irritable bowel syndrome" , which is reflected in the X revision of the ICD and some publications of domestic scientists Methodological recommendations are intended for physicians - therapists, gastroenterologists, clinical pharmacologists, endocrinologists, nutritionists, general practitioners, senior students of medical universities .