Pu Ji Xiao Du Yin by Blue Poppy’s Great Nature Classics is a formula that comes from Li Dong-yuans Song dynasty Dong Yuan Shi Xiao Fang (Dong-yuans Tried & Effective Formulas).
Within this formula, Huang Lian and Huang Qin clear and drain heat toxins from the upper burner.
Niu Bang Zi, Lian Qiao, Bo He, and Bai Jiang Can dispel wind and clear heat from the upper burner, head, and face.
Xuan Shen, Ma Bo, Ban Lan Gen, Jie Geng, and Gan Cao together clear heat and resolve toxins as well as free the flow of the throat.