The paper deals with the analysis of the results of chemotherapy of 78 patients with multiple myeloma using various combinations of cytotoxic drugs such as vincristine, cyclophosphamide, sarcolysine (melphalan), rubomycin (adriamycin) and prednisolone (dexamethasone). Reaferon was added in some cases. Response was evaluated according to standard criteria. Survival and response were assessed versus treatment modality and immunochemical type of disease. The most effective chemotherapeutic regimens for multiple myeloma are discussed. It is recommended that remission induction be followed by courses of consolidation treatment and then by maintenance therapy. Reaferon used as a component of complex treatment for multiple myeloma was shown to markedly potentiate the antitumor effect.