Blood transfusion in veterinary practice is widespread in Russia. But in the case of transfusion reactions, we do not have general guidelines for the pharmacocorrection of such reactions. The frequency of hemotransfusion reactions is unknown. Preparation for hemotransfusion includes determining the blood type in cats or the antigen in dogs and a crosscompatibility test that can make blood transfusion safe. However, allergic reactions or other individual reactions to the donor's blood in the recipient cannot be predicted. There are general measures for transfusion reactions, such as monitoring, cessation of hemotransfusion, control of angioedema, pressure correction, therapy against hypersensitivity. The article summarizes the pharmacocorrection of transfusion reactions in dogs and cats.