This study looks at how well a new medicine called povorcitinib works for people with nonsegmental vitiligo. Vitiligo is a condition where patches of skin lose color. "Nonsegmental" means it can appear on both sides of the body. Participants must be 18 years or older and have a certain amount of skin affected by vitiligo, which is measured by T-BSA (Total Body Surface Area) and T-VASI (Total Vitiligo Area Scoring Index). If you join, you will need to stop using other vitiligo treatments during the study. You cannot join if you have other skin problems, used certain treatments recently, or have specific health issues like heart problems or serious infections.

• The study is for adults aged 18 and above with nonsegmental vitiligo.
• Participants need to stop using other treatments for vitiligo.
• People with certain health issues or pregnancy cannot participate.