Xiao Chaihu Tang (小柴胡汤 Minor Bupleurum Decoction) originates from Treatise on Febrile Diseases (伤寒论). As a main recipe for treating Shaoyang syndrome, it has been practiced so far with obvious therapeutic effect. The main symptoms of Shaoyang syndrome are alternate chills and fever,chest fullness, Xiao Chaihu Tang (Minor Bupleurum Decoction) originates from Treatise on Febrile Diseases (寒寒论). As a main recipe for treating Shaoyang syndrome, it has been practiced so far with significantly therapeutic effect. The main symptoms of Shaoyang syndrome are alternate Chills and fever,chest fullness,