Based on medical cases about ginger juice in

A Clinical Guide with Case Histories

（《临证指南医案》）， we found that YE Tianshi apply ginger juice into the medicine mainly take its function of warming stomach to stop nausea， acrid-moist to unblock the collaterals， dissolving phlegm to expel fluid retention. It is often used with Ganjiang （

Zingiber officinale

）， Fuzi （

Cyperus rotundus

） and other warm medicinals to warm the yang qi； with Banxia （

Pinellia ternata

）， Huanglian （

Picrorhiza kurroa

） and other bitter-acrid medicinals to clear dampness and heat； with Zhuli （

Arundo donax

）， Juhong （

Citrus reticulata

） and other phlegm-resolving medicinals to clear turbid phlegm. Compared with the whole ginger， ginger juice is soft and easy to be absorbed； it is acrid-moist and can unblock the collaterals with stronger power. At the same time， it can enhance the effect of dissolving phlegm to expel fluid retention. Ginger juice can improve the efficacy of the medicinals and broaden the scope of ginger's medicinal use.