Wú Zhū Yú (吳茱萸): Acrid and bitter flavor, warm nature; enters the foot Yángmíng stomach, foot Tàiyīn spleen, and foot Juéyīn liver channels. Warms the centre, drains dampness, opens depression, breaks congealment, descends turbid yin to stop vomiting, and ascends clear yang to stop diarrhea.
Cold Damage’s Wú Zhū Yú Tāng
Wú Zhū Yú (吳茱萸) 1 shēng
Rén Shēn (人蔘) 3 liǎng
Shēng Jiāng (生薑) 6 liǎng
Dà Zǎo (大棗) 12 pieces
Treats Yángmíng cold damage with a desire to vomit after eating. Normally, stomach qi descends, [which results] in the absence of vomiting on the intake [of food]. [When] stomach qi adversely ascends, this results in vomiting and reduced [food] intake. Rén Shēn and Dà Zǎo bank the earth and supplement the center; Wú Zhū Yú and Shēng Jiāng warm the stomach and descend counterflow. [This] treats Juéyīn disease with dry retching, vomiting of foamy drool, and headaches.
Due to deficiency of the earth, wood becomes stagnant, centre qi is harmed, the stomach ascends as opposed to descending, and turbid qi is upthrusted, resulting in headaches and dry retching.
When damp qi is congealed and stagnant, this results in vomiting of foamy drool. Rén Shēn and Dà Zǎo bank the earth and supplement the center; Wú Zhū Yú and Shēng Jiāng descend counterflow and course wood. [This] treats Shàoyīn disease with vomiting, diarrhea, reversal cold of the extremities, vexation, agitation and a desire to die.
When cold water rebels against the earth, the spleen sinks and the stomach [runs] counterflow, which leads to both vomiting and diarrhea. [When] center qi is depleted, the four limbs lack warmth, resulting in reversal cold of the extremities. [When] yang departs from its root, it disperses and strays without returning, resulting in vexation, agitation and a desire to die. Rén Shēn and Dà Zǎo bank the earth and supplement the center; Wú Zhū Yú and Shēng Jiāng descend counterflow and ascend that which is sinking.
In the Jīn Guì [this formula] treats vomiting and chest fullness. [When] the center is deficient and the stomach runs counterflow, turbid qi becomes congested in the chōng vessel, resulting in vomiting and chest fullness. Rén Shēn and Dà Zǎo bank the earth and supplement the center; Wú Zhū Yú and Shēng Jiāng descend counterflow and drain fullness.