Patent ID: 8153167

Claim:
A pharmaceutical composition comprising the following six herbal materials: (i) purified extract of Yin Yang Huo; (ii) purified extract of Bu Gu Zhi; (iii) purified extract of Shu Di; (iv) purified extract of Du Zhong; (v) purified extract of She Chuang Zhi; and (vi) purified extract of Huang Qi, wherein component (i) is produced by fractionating an alcohol solvent extract of Yin Yang Huo by chromatography on silica gel, the active fraction being eluted using 20% methanol in ethyl acetate, then concentrated and dried in vacuum; wherein component (ii) is produced by fractionating alcohol solvent extract of Bu Gu Zhi by chromatography on a lipophilic crosslinked dextran-based resin using methanol as eluant, the eluted fraction being concentrated and evaporated to dryness under vacuum; wherein component (iii) is produced by adding ethanol to a crude aqueous extract of Shu Di and collecting the precipitate formed; wherein component (iv) is produced by fractionating an alcohol solvent extract of Du Zhong by chromatography on silica gel; wherein component (v) is produced by adding acetone to an alcohol solvent extract of She Chuang Zhi, collecting the acetone extract, followed by evaporation to dryness of the acetone extract; and wherein component (vi) is produced by adding ethanol to a water extract of Huang Qi and collecting the precipitate formed.