柴胡（半斤） 黄芩（三两） 半夏（半斤洗） 芍药（三两） 枳实（四枚炙） 大黄（二两）
生姜（五两切） 大枣（十二枚擘）
上七味。以水一斗二升。煮取六升。去滓。再煎。温服一升。日三服。
此小柴胡去人参甘草。加枳实芍药大黄。乃少阳阳明合治之方也。往来寒热。热结在里
。是
邪已内实。因其内实而下解之。乃通以去塞之法也。心中痞硬。呕吐下利。是邪已内陷。因
其
内陷而下夺之。此通因通用之法也。表未罢仍主柴胡。里已实宜加枳实大黄。不用人参甘草
者。惧其缓中而恋邪也。加芍药者。取其约营而存液也。按少阳病本不可下。
此则热邪结于阳明。而少阳证仍在。故主此为表里两解之法。
柴胡（二两十六铢） 黄芩 甘草（炙） 人参 生姜（各一两切） 半夏（二十铢洗） 大枣
（四枚） 芒硝（二两）
上八味。以水四升。煮取二升。去渣。纳芒硝。更煮微沸。分温再服。不解。更作服。
小柴胡汤原方加芒硝。而分两较轻。盖潮热固为内热之候。但其人业已微利。是里气已
通。
特因下不如法。故府邪未解。则无取大柴胡之峻攻。其柴胡证之未罢者。亦已先用小柴胡汤
以解外。此更无须柴胡之全剂。故复减约其分两。而但加芒硝以微通其滞。此剂之最轻者。
张令韶谓当用大柴胡汤加芒硝。与经旨大悖矣。
徐灵胎曰。大柴胡汤加大黄枳实。乃合用小承气也。此加芒硝。乃合用调胃承气也。皆
少阳阳明同治之方。
柴胡（半斤） 黄芩（三两） 半夏（半斤，洗净） 芍药（三两） 枳实（四枚，炙烤） 大黄（二两）
生姜（五两，切片） 大枣（十二枚，掰开）
以上七味药。用水一斗二升。煮取六升药液。滤去药渣。再次煎煮。每次温服一升。每日服用三次。
这是小柴胡汤去掉人参、甘草，加入枳实、芍药、大黄而成的方剂。这是治疗少阳病与阳明病合病的方子。往来寒热，热邪结聚在体内。说明邪气已经内实。因为内部结实而采用攻下法来解除它。这是“通因通用”以去除闭塞的方法。心中痞塞坚硬，呕吐并伴有下利。说明邪气已经内陷。因为邪气内陷而采用攻下夺实的方法。这也是“通因通用”的治疗方法。表证未解仍主要使用柴胡类方。里证已实宜加入枳实、大黄。不用人参、甘草的原因，是害怕它们缓和药性而留恋邪气。加入芍药的原因，是取其收敛营气而保存津液的作用。按：少阳病本来不可用下法。此处则是热邪结于阳明，而少阳证仍然存在。所以以此方作为表里双解的方法。
柴胡（二两十六铢） 黄芩 甘草（炙烤） 人参 生姜（各一两，切片） 半夏（二十铢，洗净） 大枣
（四枚） 芒硝（二两）
以上八味药。用水四升。煮取二升药液。滤去药渣。加入芒硝。再煮至微微沸腾。分两次温服。若病不解。再制作服用。
小柴胡汤原方加入芒硝，但分量较轻。因为潮热固然是内热的征候。但是患者已经轻微腹泻。说明里气已经通畅。只是因为攻下不得法。所以腑中的邪气未解。则不需要大柴胡汤的峻猛攻下。其柴胡证尚未解除的部分。也已经先用小柴胡汤来解除表邪。此时更不需要全剂量的柴胡。所以又减少约了分量。只加入芒硝以轻微疏通其滞涩。这是分量最轻的方剂。张令韶说应当用大柴胡汤加芒硝。这与经典旨意大相径庭。
徐灵胎说。大柴胡汤加大黄、枳实。乃是合用小承气汤的意思。此方加芒硝。乃是合用调胃承气汤的意思。都是少阳与阳明同治的方剂。
Chai Hu (Bupleuri Radix, half jin), Huang Qin (Scutellariae Radix, three liang), Ban Xia (Pinelliae Rhizoma preparatum, half jin, washed), Shao Yao (Paeoniae Radix Alba, three liang), Zhi Shi (Aurantii Fructus Immaturus, roasted, four pieces), Da Huang (Rhei Radix et Rhizoma, two liang)
Sheng Jiang (Zingiberis Rhizoma Recens, five liang, sliced), Da Zao (Jujubae Fructus, twelve pieces, torn open)
The above seven herbs. Decoct with one dou and two sheng of water. Boil down to six sheng. Strain the dregs. Re-decoct. Take one sheng warm each time, three times a day.
This is Xiao Chai Hu Tang (Minor Bupleurum Decoction) with Ren Shen (Ginseng Radix) and Gan Cao (Licorice Root) removed, and Zhi Shi, Shao Yao, and Da Huang added. It is a formula for treating the combined syndrome of Shaoyang (Lesser Yang) and Yangming (Yang Brightness). The alternating chills and fever, with heat binding internally, indicates that the pathogenic factor has become internal excess. Because of this internal excess, purgation is used to resolve it. This is the method of "treating obstruction with unblocking" to remove blockage. The feeling of fullness and hardness in the heart region, accompanied by vomiting and diarrhea, indicates that the pathogenic factor has sunk inward. Because of this sinking, downward purging is employed to drain the excess. This is also the method of "using unblocking treatment for unblocking symptoms" (Tong Yin Tong Yong). Since the exterior syndrome has not resolved, Chai Hu-based formulas remain primary. Since the interior is already excess, Zhi Shi and Da Huang should be added. Ren Shen and Gan Cao are not used out of fear that they will moderate the middle jiao and retain the pathogen. Shao Yao is added to gather the Ying (Nutritive) level and preserve body fluids. Note: Shaoyang syndrome generally should not be treated with purgation. Here, however, heat pathogens bind in Yangming while Shaoyang symptoms persist. Therefore, this formula serves as a method to resolve both exterior and interior simultaneously.
Chai Hu (two liang and sixteen zhu), Huang Qin, Gan Cao (roasted), Ren Shen, Sheng Jiang (each one liang, sliced), Ban Xia (twenty zhu, washed), Da Zao
(four pieces), Mang Xiao (Natrii Sulfas, two liang)
The above eight herbs. Decoct with four sheng of water. Boil down to two sheng. Strain the dregs. Add Mang Xiao. Cook again until slightly boiling. Divide into two doses and take warm. If not resolved, prepare another dose.
Xiao Chai Hu Tang original formula plus Mang Xiao, but with lighter dosages. Although tidal fever is indeed a sign of internal heat, the patient has already experienced mild diarrhea, indicating that the Qi of the interior is already flowing freely. It is merely because the previous purgation was improperly performed that the pathogenic factors in the fu organs have not yet resolved. Thus, the harsh purgation of Da Chai Hu Tang (Major Bupleurum Decoction) is unnecessary. For the part of the Chai Hu syndrome that has not yet resolved, Xiao Chai Hu Tang was already used first to resolve the exterior. At this point, there is no need for the full dosage of Chai Hu. Therefore, the dosages are further reduced, adding only Mang Xiao to gently clear the stagnation. This is the lightest of these formulas. Zhang Lingshao stated that Da Chai Hu Tang plus Mang Xiao should be used, which contradicts the intent of the classic text.
Xu Lingtai said: Adding Da Huang and Zhi Shi to Da Chai Hu Tang is equivalent to combining with Xiao Cheng Qi Tang (Minor Order the Qi Decoction). Adding Mang Xiao here is equivalent to combining with Tiao Wei Cheng Qi Tang (Regulate the Stomach and Order the Qi Decoction). Both are formulas for treating Shaoyang and Yangming simultaneously.