Overview Effects Of CP-690,550 (Tasocitinib) On Cholesterol Metabolism In Patients With Active Rheumatoid Arthritis Status: Completed Trial end date: 2012-02-01 Target enrollment: Participant gender: Summary The purpose of study is to explore the effect of CP-690,550 (tasocitinib) on cholesterol metabolism in patients with active rheumatoid arthritis (RA). Phase: Phase 1 Details Lead Sponsor: PfizerTreatments: Tofacitinib