Brief Report: Safety and Immunogenicity of Rituximab Biosimilar GP 2013 After Switch From Reference Rituximab in Patients With Active Rheumatoid Arthritis.

Objective: Comparable clinical efficacy of the rituximab (RTX) biosimilar GP2013 and reference RTX has been established in blinded randomized trials. However, when switching from a reference biologic to a biosimilar, potential safety implications are often an important consideration. Therefore, the aim of this study was to evaluate the safety of switching from reference RTX to RTX biosimilar GP2013 compared with treatment continuation with reference RTX in patients with rheumatoid arthritis (RA).