Overview Efficacy and Safety of Tofacitinib in Subjects With Active Ankylosing Spondylitis (AS) Status: Completed Trial end date: 2020-08-20 Target enrollment: Participant gender: Summary The purpose of this study is to determine if tofacitinib is safe and effective in subjects with active ankylosing spondylitis. Phase: Phase 3 Details Lead Sponsor: PfizerTreatments: Tofacitinib