Investigating the efficacy and safety of brepocitinib in adults with dermatomyositis
The purpose of this study is to assess the efficacy of two dose levels of brepocitinib in adults with dermatomyositis compared to a placebo. After 52 weeks of double-blind treatment, participants have the option to continue therapy in a 52-week, open-label extension phase where all participants will receive brepocitinib.