[Multi-center clinical study on therapeutic effect of kunxian capsule on rheumatoid arthritis].

Objective: To assess the therapeutic efficacy and safety of Kunxian Capsule (KXC) in treatment of rheumatoid arthritis (RA).

Methods: Randomized positive parallel controlled and multi-center open test method was adopted. 240 RA patients of mild/moderate degree were randomly assigned to three groups equally, i.e., KXC group (who took KXC), the methotrexate (MTX) group (who took MTX), and the KXC + MTX group (who took KXC and MTX simultaneously), respectively. The therapeutic course for them all was 12 weeks. The effect of the treatment was assessed in items of DAS28, ACR20, and ACR50; number of joints with pain and swelling; VAS score of pain, tiredness, and general condition; time of morning stiffness; bilateral grip strength; HAQ score, as well as blood levels of erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), anti-CCP antibody, and platelet count.

Results: By the end of the 4th week, the improvement of ACR20, ACR50, DAS28 efficacy judgment, and DAS28 score in the KXC + MTX group were much better than those in the other two groups, with statistical difference (P<0.05). The total effective rate was 88. 6% and the markedly effective rate was 51.8% in the KXC + MTX group at the 12 th week. The Improvement was more obviously shown in all groups after treatment (all P<0.05). Better effects in reducing VAS scores of pain and tiredness were shown in the KXC group and the KXC + MTX group. The effects of KXC + MTX were superior to the other two groups in terms of swollen joint numbers, pain joints, grip strength (assessed by researcher), as well as VAS score of general condition and HAQ score (assessed by both patients and researcher, P<0.05). But the differences among groups in improving morning stiffness and the incidence rate of adverse events were in- significant.

Conclusions: KXC could relieve symptoms, improve joint functions, physical signs, and laboratory indices of RA patients with less adverse reaction. It was synergistic with MTX.