FIELD : medicine.SUBSTANCE : invention relates to medicine, the pharmaceutical industry, and in particular to a method for activating the regenerative process of the tracheal epithelium in old rats. Method of activation of the regenerative process of the airway epithelium in old rats on the background of general cooling, including the daily use of dihydroquercetin, at least 14 days prior to the beginning of the cold period, in a dose of 5 mg/100 g, orally.EFFECT : proposed method for activating the regeneration process of the tracheal epithelium in old rats has a modulating effect on the regenerative process of the epithelial lining of the tracheal mucosa.1 cl, 2 dwg, 2 tbl