A Clinical Study of Xin'an Medicine in the Treatment of Bi Syndrome

Bi Syndrome is one of Traditional Chinese Medicine（TCM）name, It means an obstruction in Chinese,and it refers the syndrome characterized by the obstruction of qi and blood in the meridians due to the invasion of external pathogenic wind,cold and dampness, manifested as soreness, pain, numb,etc. Bi Syndrome contains Rheumatoid arthritis(RA). RA is a chronic disease affecting more than 20 million people in the world.It is one of the most common forms of autoimmune disease. Xin\'an Medicine is one of Traditional Chinese Medicine which originated from AnHui. Xinfeng Capsule developed according to the Xin\'an medicine theory ,and it has long been adopted for treatment of rheumatoid arthritis (RA). The study is aimed to evaluate the effectiveness and safety of Xinfeng Capsule in the treatment of RA.