What is "xiaochaihutang"

The Xiaochaihutang (XCHT) is a famous Chinese herbal formula which consists of seven Chinese herbs, Huangqin (Radix Scutellariae), Renshen (Ginseng), Gancao (Radix glycyrrhizae), Banxia (Rhizoma pinelliae), Shengjiang (Rhizoma zingiberis recens), Chaihu (Radix Bupleuri) and Dazao (Fructus jujubae). That formula was first recorded in “Shang Han Lun” two thousand years ago for treatment of depression