An Open-label Extension Study Evaluating the Safety and Efficacy of Upadacitinib (ABT-494) in Adults With Rheumatoid Arthritis

This is an open-label extension study to assess the long-term safety, tolerability, and efficacy of upadacitinib in adults with RA who have completed Study M13-550 (NCT01960855) or Study M13-537 (NCT02066389) Phase 2 randomized controlled trial (RCT) with upadacitinib. All participants received treatment with 6 mg upadacitinib twice a day at the start of the study. Participants may have been up-titrated to 12 mg BID based on protocol-specified criteria. In Protocol Amendment 2 (January 2016) the study treatment was changed to a once daily (QD) formulation. Participants receiving 6 mg BID were transitioned to 15 mg QD and participants receiving 12 mg BID were transitioned to 30 mg QD dosing. An optional 12-week vaccine sub-study was added in Protocol Amendment 3 (November 2017) to assess the impact of upadacitinib treatment (15 mg QD and 30 mg QD) with background methotrexate on immunological responses to pneumococcal 13-valent conjugate vaccine (PCV-13; Prevnar 13®) in RA patients. The vaccine substudy included 111 participants who were enrolled in the main study, the first participant was enrolled on 13 February 2018 and the the last participant completed the sub-study on 9 April 2020. In Protocol Amendment 5 (December 2019), the protocol was revised to allow a decrease in upadacitinib dosing from 30 mg QD to 15 mg QD, as appropriate, based on investigator's medical decision or for safety/tolerability concerns.