More than 20 minutes.

Bai Tong Tang breaks yin and returns yang, and declares the upper and lower parts of the body. It is mainly used for treating the yin-sheng-dai-yang evidence of Shaoyin disease. The hands and feet are syncopated, and there is discharging of fluid with a slight pulse and a red face. Usage of the above three flavors, with three liters of water, boil a liter, remove the dregs, divided into warm and then served.