- Concomitant use of disease modifying antirheumatic medications (hydroxychloroquine, sulfasalazine, methotrexate, leflunomide, etc) biologic agents (infliximab, etanercept, adalimumab, abatacept, rituximab, anakinra) is permitted provided that the dose(s) have been stable for 4 weeks prior to screening, and may reasonably be expected to remain on stable doses throughout the duration of the trial