Comparative study of the effect of narrowband ultraviolet B phototherapy plus methotrexate vs. narrowband ultraviolet B alone and methotrexate alone in the treatment of plaque-type psoriasis.

Background: Widespread psoriasis has great effects on life. Effective and rapid response in the treatment is needed. So this study was done to compare the efficacy of combined narrowband ultraviolet-B (NBUVB) plus methotrexate (MTX) versus each one alone in the treatment of psoriasis.