Ban xia gan jiang san
ban xia 9 gan jiang 9
For dry heaves, adverse flow and vomiting, and vomiting of slime and foam, ban xia gan jiang san governs.
It treats cold and damp accumulation in the yang ming stomach causing counter flow qi. It is a yang formula in that it warms and transforms fluids.
Ban xia, Pinelliae rhizoma is pungent dispersing of the liver blood and the ministerial fire in the san jiao. It is pungent dispersing of the cold and dampness in the stomach domain, spleen and lung. It transforms tai yin damp phlegm generated from excessive and stagnant cold dampness and counteracts nausea and adverse flow.
Combined with gan jiang it dries and transforms excessive internal dampness.
Gan jiang, Zingiberis rhizoma, dried is warm (or hot) pungent and astringent. Gan jiang is the main herb to warm the tai yin level and treat excessive dampness by introducing yang ming dryness in tai yin dampness.
We can compare this to xiao ban xia tang ban xia 24 sheng jiang 24 which is more dispersing of fluids and less warm than ban xia gan jiang san.