A Study of the Efficacy and Safety of TACI-antibody Fusion Protein Injection (RC18) in Subjects with Inadequate Response to MTX Due to Treat Moderate and Severe Rheumatoid Arthritis.

The trial was divided into two groups: (1) placebo + MTX; (2) telitacicept 160 mg + MTX. MTX was used as the basic treatment, the dose of MTX was stable during the trial, and could not be adjusted. Telitacicept or placebo was administered once a week for the first 24 weeks. Beginning at week 24, subjects in the placebo group will enter the RC-18 treatment group. All subjects received RC-18 treatment once a week from week 24 to week 48.

The trial was divided into two groups: (1) placebo + MTX; (2) telitacicept 160 mg + MTX. MTX was used as the basic treatment, the dose of MTX was stable during the trial, and could not be adjusted. Telitacicept or placebo was administered once a week for the first 24 weeks. Beginning at week 24, subjects in the placebo group will enter the RC-18 treatment group. All subjects received RC-18 treatment once a week from week 24 to week 48.