Can TNF-Alpha Incomplete Secondary Responders Attain a Safe and Efficacious Response Switching to Cimzia

Purpose of the study is to determine if Cimzia is safe and effective in subjects who have received previous treatment with a TNF-alpha inhibitor other than Cimzia.

This is a Phase IV, randomized, multi-center, double-blind, parallel-group 12-week study of Cimzia with concomitant methotrexate (MTX) or other DMARD compared to MTX or other DMARD alone in patients with an inadequate secondary therapeutic response to a TNF-alpha inhibitor as defined above and active rheumatoid arthritis (RA) followed by a 12-week open-label phase with concomitant MTX or other DMARD and Cimzia. Subjects must washout from the previous TNF inhibitor for at least 4 weeks prior to the baseline visit. Subjects unable to tolerate MTX must have been on a stable dose of another non-biologic DMARD for at least 3 months. Subjects' diagnosis of RA must be based on the 1987 Revised American Rheumatism Association Criteria for the Classification of Rheumatoid Arthritis. Subjects will be screened for eligibility and, up to 28 days later, at the baseline visit, randomized to one of two treatment groups (2:1): Cimzia or placebo (in addition to concomitant MTX or other DMARD). All subjects will continue MTX/other DMARD at the same dose utilized prior to study entry. After the Week 12 study visit, all subjects will have the opportunity to continue in the study on open-label Cimzia treatment (using an induction regimen for all subjects, regardless of their treatment in the blinded phase).