黄连 甘草（炙） 干姜 桂枝（各三两去皮） 人参（二两） 半夏（半升洗） 大枣（十二
枚擘）
上七味。以水一斗。煮取六升。去滓。温服一升。日三夜二服。
伤寒胸中有热。胃中有邪气。腹中痛。欲呕吐者。黄连汤主之。按胸中有热。则阳邪格
于上。故
欲呕吐。胃中有邪气。则阴邪格于下。故腹中痛。腹中痛。欲下而不得下也。欲呕吐。欲吐
而仍不得吐也。上热下寒。法当和解。方用黄连泻胸热。干姜散胃寒。复以半夏宽中而开结
。佐以桂枝通阳而化阴。然上征下夺。宜从中治。故用人参甘草大枣。创建中气。而上下之
邪。各随所主之药而分解。此泻心之变方。而又与泻心之取义不同。
黄芩（三两） 甘草（炙） 芍药（各二两） 大枣（十二枚擘）
上四味。以水一斗。煮取三升。去滓。温服一升。日再夜一服。
太阳与少阳合病。自下利者。与黄芩汤。按合病而至于下利。则邪气将从少阳。转陷入
里。
故君黄芩彻少阳之热。而复以芍药约之。甘枣和之。使热清而利自止。虽半表半里之邪。而
里多于表。故治法不从表而从里。
太阳阳明合病下利。表证为多。主葛根汤。阳明少阳合病下利。里证为多。主承气汤。
太阳
少阳合病下利。半里半表之证为多。此方即是和法。同一合病下利。而主治不同。何等深细
。
Rhizoma Coptidis (Huanglian), Radix Glycyrrhizae Preparata (Zhi Gancao), Rhizoma Zingiberis Recens (Ganjiang), Ramulus Cinnamomi (Guizhi) [each 3 liang, bark removed], Radix Ginseng (Renshen) [2 liang], Rhizoma Pinelliae Preparatum (Banxia) [half sheng, washed], Fructus Jujubae (Dazao) [12 pieces, split open].
The above seven herbs. Decoct with 10 dou of water, boil down to obtain 6 sheng of liquid, remove the dregs. Take 1 sheng warm, three times during the day and twice at night.
In Shaoyang disease (Shaoyang Bing), if there is heat in the chest and cold qi in the stomach, accompanied by abdominal pain and a desire to vomit, Huanglian Tang (Coptis Decoction) is the primary formula. Commentary: Heat in the chest indicates Yang pathogenic factors obstructing upwards, hence the desire to vomit; Cold qi in the stomach indicates Yin pathogenic factors obstructing downwards, hence the abdominal pain. The abdominal pain signifies a desire to defecate but inability to do so; the desire to vomit signifies a desire to expel but inability to do so. With Upper Heat and Lower Cold, the treatment method should be harmonization. In this formula, Huanglian (Rhizoma Coptidis) clears the heat in the chest, Ganjiang (Rhizoma Zingiberis Recens) disperses the cold in the stomach, Banxia (Rhizoma Pinelliae Preparatum) opens the middle jiao and resolves stagnation, assisted by Guizhi (Ramulus Cinnamomi) to unblock Yang and transform Yin. However, since there are signs above and depletion below, treatment should focus on the Middle Jiao. Therefore, Renshen (Radix Ginseng), Gancao (Radix Glycyrrhizae Preparata), and Dazao (Fructus Jujubae) are used to establish Middle Qi, allowing the pathogens above and below to be resolved according to their respective governing herbs. This is a modified variation of Xiexin Tang (Heart-Draining Decoction), yet its rationale differs from that of Xiexin Tang.
Radix Scutellariae (Huangqin) [3 liang], Radix Glycyrrhizae Preparata (Zhi Gancao), Radix Paeoniae Alba (Shaoyao) [each 2 liang], Fructus Jujubae (Dazao) [12 pieces, split open].
The above four herbs. Decoct with 10 dou of water, boil down to obtain 3 sheng of liquid, remove the dregs. Take 1 sheng warm, twice during the day and once at night.
When Taiyang disease (Taiyang Bing) and Shaoyang disease (Shaoyang Bing) combine (Hebing), resulting in spontaneous diarrhea, Huangqin Tang (Scutellaria Decoction) should be administered. Commentary: When combined diseases progress to diarrhea, the pathogenic factor tends to transition from Shaoyang into the interior. Therefore, Huangqin (Radix Scutellariae) is used as the sovereign herb to clear Shaoyang heat, assisted by Shaoyao (Radix Paeoniae Alba) to constrain it, and Gancao (Radix Glycyrrhizae Preparata) and Dazao (Fructus Jujubae) to harmonize it. This clears the heat and stops the diarrhea naturally. Although the pathogen is in the half-exterior half-interior, the interior syndrome predominates over the exterior syndrome; thus, the treatment method addresses the interior rather than releasing the exterior.
When Taiyang disease (Taiyang Bing) and Yangming disease (Yangming Bing) combine causing diarrhea, where exterior syndromes predominate, Gegen Tang (Pueraria Decoction) is indicated. When Yangming disease (Yangming Bing) and Shaoyang disease (Shaoyang Bing) combine causing diarrhea, where interior syndromes predominate, Chengqi Tang (Descending the Qi Decoction) is indicated. When Taiyang disease (Taiyang Bing) and Shaoyang disease (Shaoyang Bing) combine causing diarrhea, where half-exterior half-interior syndromes predominate, this formula represents the Harmonizing Method. Although all are combined diseases causing diarrhea, the primary treatments differ, demonstrating profound subtlety.