The purpose of this study is to confirm the safety of 24 weeks-treatment with the combination of tacrolimus + biological agents, and to assess the efficacy using SDAI, CDAI, DAS28-CRP, MMP-3, MHAQ in patients with rheumatoid arthritis who have not achieved SDAI remission despite of using biological agents for over 8 weeks.
This study is to evaluate the safety and the effectiveness of treatment with tacrolimus and biological agents.