The safety and efficacy of a JAK inhibitor in patients with active rheumatoid arthritis: Results of a double‐blind, placebo‐controlled phase IIa trial of three dosage levels of CP‐690,550 versus placebo

Abstract

Our findings indicate that CP-690,550 is efficacious in the treatment of RA, resulting in rapid, statistically significant, and clinically meaningful reductions in the signs and symptoms of RA. Further studies of CP-690,550 in RA are warranted.