FIELD : medicine.SUBSTANCE : invention relates to medicine, in particular to veterinary medicine, in particular to a method for normalizing the emotional-mental state of domestic animals. For this purpose, the animal is injected with a drug containing the active substance in the form of an activated – potentiated form of antibodies to the brain-specific protein S-100.EFFECT : invention provides an effective way to normalize the emotional-mental state of domestic animals through the use of non-toxic drugs that affect the function of the nervous system.6 cl, 4 dwg, 2 ex, 3 tbl