Effectiveness and Safety of Azathioprine versus PUVA-SOL as Steroid-Sparing Agents in the Treatment of Unstable Vitiligo.

Vitiligo is an acquired chronic loss of skin pigmentation characterized by white and frequent symmetric patches, for which corticosteroids are the mainstay of treatment. Regular intake of steroids for prolonged periods is frequently associated with severe and sometimes irreversible adverse events. This study was designed to compare the effectiveness and safety profiles of azathioprine versus psoralen+ultraviolet light A (PUVA)-solar light (SOL; sunlight) to determine which agent reduces the length and adverse effects of vitiligo therapy in a better manner. This single-center, randomized, open-label, prospective case-control study recruited 100 patients. Oral mini-pulse (OMP) corticosteroid therapy was administered to all patients during the first month of the study. The first group of patients (group A) continued with azathioprine 50-mg tablet twice a day (BID), and the second group (group B) was given PUVA-SOL for 2 months with concurrent OMP. Disease activity was monitored. At the end of the study period, 58% (group A) and 50% (group B) of patients had their improved vitiligo area severity index (VASI) scores by 25%-50%. Similarly, 36% (group A) and 50% (group B) of patients improved their VASI score by more than 50%. On the global physician assessment scale, 42% (group A) and 54% (group B) patients had a good to excellent response. Based on these findings, both azathioprine and PUVA-SOL were considered as good steroid-sparing agents, primarily if used with an initial phase of concomitant oral corticosteroids.