A Study of Iguratimod in Patients With Active Rheumatoid Arthritis

Inclusion Criteria: * Subjects with a diagnosis of RA * Subjects who have active RA at the time of screening * Subjects who haven't used any antirheumatic drugs or have used antirheumatic drugs for more than 3 months at the time of screening * Written informed consent Exclusion Criteria: * Subjects with serious cardiovascular, renal, hematologic or endocrine diseases * Pregnant or lactating women * ALT\>1.5×ULN, AST\>1.5×ULN, Cr\>135umol/L * WBC\<4×109/L，HGB\<85g/L，PLT\<100×109/L * Subjects with uncontrolled infection * Patients with active gastrointestinal diseases (such as gastric ulcer, etc.) * Allergic to any of the study drugs * History of alcoholism * Subjects receiving live vaccines within 3 months prior to study entry * Subjects participating in other clinical study within 3 months prior to study entry