The Prescription of 桂枝人参汤
The book Shang Han Lun
Gui Zhi: Expelling pathogenic factors from the muscles and skin by means of diaphoresis, warming the channels to dispel pathogenic cold.
Bai Zhu: Tonifying spleen qi.
Ren Shen: Replenishing the Qi of the middle-Jiao.
Gan Jiang: Warming the lung and dispelling cold so as to eliminate retained phlegm and warming up the spleen-Yang to remove dampness.
Zhi Gan Cao: Invigorating the spleen and stomach, tempering the actions of all the other ingredients.