Aim: the study of the efficacy of methotrexate in patients with the "escape effect" during the ustekinumab therapy. Materials and Methods. The results of methotrexate at a dose of 15-20mg/week in treatment of 4 patients receiving biologic and developed "escape effect". Ustekinumab is used as a hypodermic injection at a dose of 45 mg for a body weight of a patient no more than 100 kg, and 90 mg of body weight over 100 kg, at the zero week, the 4th week and then every 12 weeks. Patients control meets the standard management of patients in biological therapy. Results. The study shows that in the case of the resistance progressing when applying preparations of biological therapy, methotrexate is useful at a dose of 15-20mg/week for up to 6 months. The combined use of biologic therapy and methotrexate in the treatment of patients with psoriasis vulgaris, "escape effect" contributes to the marked regression of clinical symptoms and allows to control the process long enough, which is confirmed by the dynamics of the index PASI, BRS and DLQI. The combined method is highly safe, as evidenced by the lack of inhibition of hematopoiesis, the normal level of hepatic transaminases and serum creatinine, which greatly improves patient compliance in this type of therapy. Conclusion. The article presents the data of the combined application of biological medication therapy (ustekinumab) and methotrexate for the treatment of patients with the common form of psoriasis vulgaris. In the case of the development of resistance of biological therapy recommended the appointment of methotrexate. The combined use of methotrexate and biologic therapy in the treatment of patients with psoriasis vulgaris contributes to marked regression of clinical symptoms and allows to control the process for a long time.

The study presents the results of combined usage of narrowband UVB phototherapy with low — dose methotrexate in treatment of psoriasis. 48 patients with moderately severe and severe psoriasis in the phase of progression accompanied by psoriatic arthritis have been observed. 30 patients were treated with UVB therapy with a 311 nm narrowband in combination with low doses of methotrexate (7.5 mg per week). Photobox Waldmann 7002 K (Germany) with TL-01 lamps which generate radiation in 310 – 315 nm wavelength range with maximum 311 nm wavelength emission. The procedures have been carried out 4 times a week. Methotrexate should be received as tours 7.5 mg once a week, according to Weinstein — Frost scheme under the supervision of laboratory parameters. The treatment course consists of three tours. Treatment has been carried out on a background of traditional therapy.The comparison group received conventional therapy in combination with narrowband UVB phototherapy and nonsteroidal anti-infammatory drugs. Evaluation of the effectiveness of the therapy was based upon dynamic assessment of PASI and DLQI indexes and proved by earlier reduction of clinical symptoms than in the comparison group, which resulted in reduction of absolute PASI and DLQI values. No adverse effects caused by the therapy undertaken have been noted. The results of the study appear to prove safety and effectiveness of such therapy in treatment of psoriasis.