Overview Effect Of CP-690,550 On The Pharmacokinetics Of Metformin In Healthy Volunteers Status: Completed Trial end date: 2011-07-01 Target enrollment: Participant gender: Summary This study will evaluate the potential effect of CP 690,550 on the pharmacokinetics of metformin, a probe drug for organic cationic transport. Phase: Phase 1 Details Lead Sponsor: PfizerTreatments: MetforminTofacitinib