治劳疟口渴。
小柴胡汤原方去半夏，加栝蒌根四两。
柴胡去半夏加栝蒌（汤），止渴升清（此方功效如此）劳疟瘳。（疟不离乎少阳，故用柴
胡；劳
“劳疟”，中气虚也。后人用补中益气汤治之，亦效。）
治少阴病，四逆，泄利下重，其人或咳，或悸，或小便不利，或腹中痛者。
柴胡 白芍 枳实 甘草（炙） 等分为末，白饮和服方寸匕。四逆散治少阴枢，（小
柴胡汤
敛阴
同，
盖
之
解
芍药）
”
利一端
治伤寒发热，汗出不解，热结在里，心下痞硬，呕吐而下利，复往来寒热，脉沉
数者。
柴胡（半斤） 半夏（半升） 黄芩 芍药（各三两） 生姜（五两） 枳实（四枚） 大
枣（十二枚
黄二两，若
大柴胡汤芩夏芍，枳实姜枣共煎尝。（此小柴胡、四逆散二方合用者也。除去人参、甘
草者，盖热邪已结在里，不可更实其脾也。前小柴胡汤独治阳枢，故曰“小”；此则阴阳二
枢并
呕（半夏生
黄者，表里兼
用大黄。大黄乃
亦尔，仍有桂枝大
硝，乃合用调胃
解表里法也。）
（张子和《儒门事亲》） 治肌热、蒸热、积热、汗后余热，脉洪实弦数；亦
小柴胡汤去半夏，加当归、白芍、大黄。
柴胡饮子即小柴（胡汤），去夏加黄归芍偕。略施汗下兼攻补，热积三焦疟亦佳。（此方
治三
Treats thirst caused by laborious malaria (Laonu).
The original formula of Xiaochaihu Tang (Minor Bupleurum Decoction) has Banxia (Pinelliae Rhizoma) removed, and Gualougen (Trichosanthis Radix) four liang added.
Chaihu Qu Banxia Jia Gualou Tang (Bupleurum Decoction without Pinellia plus Trichosanthes Root) stops thirst and raises clear Yang (the efficacy of this formula is as such), curing laborious malaria. (Malaria is associated with the Shaoyang channel, hence Chaihu is used; "Laborious Malaria" refers to deficiency of Middle Qi. Later practitioners treated it with Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction), which is also effective.)
Treats Shaoyin disease presenting with cold extremities (Sini), diarrhea with a sensation of heaviness in the anus, or where the patient may have cough, palpitations, difficulty in urination, or abdominal pain.
Chaihu, Baishao (Paeoniae Radix Alba), Zhishi (Aurantii Fructus Immaturus), and Gancao (Glycyrrhizae Radix et Rhizoma, prepared) are ground into powder in equal proportions. Take one fangcunbi (a square-inch measure) mixed with rice water. Sini San (Four Reversals Powder) treats the pivot dysfunction of Shaoyin (similar to Xiaochaihu Tang, as Xiaochaihu Tang has the function of nourishing Yin and harmonizing).
Treats Shanghan (Cold Damage) fever where sweating does not resolve the heat, heat is bound internally causing fullness and hardness in the epigastrium (Xinxiapiying), accompanied by vomiting and diarrhea, alternating chills and fever, and a deep, rapid pulse.
Chaihu (half jin), Banxia (half sheng), Huangqin (Scutellariae Radix), Baishao (each three liang), Shengjiang (Zingiberis Rhizoma Recens, five liang), Zhishi (four pieces), Dazao (Jujubae Fructus, twelve pieces), and Dahuang (Rhei Radix et Rhizoma, two liang...). Dahuang Tang (Major Bupleurum Decoction) consists of Huangqin, Banxia, Baishao, Zhishi, Shengjiang, and Dazao decocted together. (This is a combination of Xiaochaihu Tang and Sini San. Ginseng and Gancao are removed because the pathogenic heat has already bound internally, and tonifying the Spleen further would be inappropriate. The former Xiaochaihu Tang treats only the Yang pivot, hence called "Minor"; here, both Yin and Yang pivots are addressed. If there is vomiting, raw Banxia should be used; if there is heat, Dahuang should be added. Dahuang serves to... similarly, there is still the implication of Guizhi (Cinnamon Twig) and Damian (Mirabilite), combining methods similar to Tiaowei Chengqi Tang to resolve exterior and interior pathogens.)
(Zhang Zihe's *Rumen Shiqin*) Treats muscle heat, steaming heat, accumulated heat, and residual heat after sweating, with a pulse that is surging, firm, wiry, or rapid; also applicable.
Xiaochaihu Tang removes Banxia and adds Danggui (Angelicae Sinensis Radix), Baishao, and Dahuang.
Chaihu Yinzi (Bupleurum Drink) is essentially Xiaochaihu Tang, with Banxia removed and Huangqin, Danggui, and Baishao added. Applying slight diaphoresis and purgation along with attacking and tonifying simultaneously yields good results for accumulated heat in the Triple Burner and malaria. (This formula treats the Triple Burner...)