THU0208 Efficacy of Switching Tumor Necrosis Factor α Inhibitor to a Second Tumor Necrosis Factor α Inhibitor and the Influence of Drug Levels and Anti-Drug Antibodies in Patients with Ankylosing Spondylitis and Psoriatic Arthritis

Abstract

BackgroundSwitching from the first Tumor Necrosis Factor α inhibitor (TNFi) to a second in rheumatoid arthritis is an effective strategy to decrease disease activity. Especially, when antidrug antibodies (ADA) against...