This is a randomized, double-blind, placebo-controlled parallel-group Phase II study. The study aims to evaluate the efficacy and safety of TLL-018 in adult patients with moderate to severe active rheumatoid arthritis who have inadequate response or intolerance to conventional synthetic disease-modifying antirheumatic drugs (csDMARDs).
1 Aged 18 to 70 years inclusive, any sex; body mass index [BMI = weight (kg)/height² (m²)] ≤ 35 kg/m².
1 Evidence or diagnosis of other rheumatic diseases prior to screening (secondary Sjögren's syndrome excluded), including systemic lupus erythematosus, psoriatic arthritis, mixed connective tissue disease, primary Sjögren's syndrome, dermatomyositis, polymyositis, systemic sclerosis, and ankylosing spondylitis.