太阳病，得之八九日，如疟状，发热恶寒，热多寒少。其人不呕，圊便欲自可，一日二三度发，脉微缓者，
为欲愈也。脉微而恶寒者，此阴阳俱虚，不可更发汗、更吐、更下也。面色反有热色者，未欲解也。以其不得小
汗出，身必痒，宜桂枝麻黄合半汤。
太阳病七日以上自愈者，以行其经尽故也。七八日不解，恶寒发热如疟，是将转系少阳矣。太阳以阳为主，
热多寒少，是主胜而客负，此为将解之症。若其人不呕，是胃无寒邪，圊便是胃无热邪，脉微缓是脉有胃气，一
日二三度发，是邪无可容之地。斯正胜而邪却，可勿药也。若其人热多寒少，脉甚微而无和缓之意，是弱多胃
少曰脾病，此至阴虚矣。但恶寒而不恶热，是二阳虚矣。阴阳俱虚，当调其阴阳，阴阳和而病自愈，不可更用
汗、吐、下法也。若其人热多寒少，而面色缘缘正赤者，是阳气怫郁在表而不得越。当汗不汗，其身必痒，汗
出不彻，未欲解也。可小发汗，故将桂枝麻黄汤各取三分之一，合为半服而与之。所以然者，以八九日来，正气
已虚，邪犹未解，不可更汗，又不可不汗，故立此和解法耳。旧本俱作各半，今从宋本校正。
麻黄桂枝合半汤∶
桂枝汤三合，麻黄汤三合，并为六合，顿服。
后人算其分两，合作一方，大失仲景制方之意。
太阳病，发热恶寒、热多寒少、脉微弱者，此无阳也，不可发汗，宜桂枝二越婢一汤。
此条与上条中节同义。
本论无越婢症，亦无越婢汤方。《金匮要略》有越婢汤方，世本取合者即是也。仲景言不可发汗，则不用
麻黄可知；言无阳，则不用石膏可知。若非方有不同，必抄录者误耳。宁缺其方，勿留之以滋惑也。
上论麻黄桂枝合半汤脉症。
Taiyang disease (Taiyang syndrome), after eight or nine days, presents with symptoms resembling malaria: fever and aversion to cold, with heat predominating over cold. If the patient does not vomit, and defecation is relatively normal, with episodes occurring two or three times a day, and the pulse is slightly slow and relaxed, this indicates that recovery is imminent. If the pulse is slight and there is aversion to cold, this signifies deficiency of both Yin and Yang; in such cases, sweating, vomiting, or purging methods should not be used again. If the face shows an abnormal redness, it means the pathogen has not yet resolved. Because slight sweating cannot occur, the body will likely feel itchy; Guizhi Mahuang Ban Tang (Half Cinnamon Twig and Ephedra Decoction) is appropriate.
When Taiyang disease resolves spontaneously after seven days or more, it is because the pathogen has exhausted its course through the meridians. If unresolved after seven or eight days, with aversion to cold and fever resembling malaria, the condition is about to transition into Shaoyang syndrome (Shaoyang syndrome). Taiyang disease is governed by Yang Qi; when heat predominates over cold, it indicates that the healthy Qi prevails while the pathogenic factor recedes, signaling an impending resolution. If the patient does not vomit, it implies no cold pathogen in the Stomach; if defecation is normal, it implies no heat pathogen in the Stomach; if the pulse is slightly slow and relaxed, it indicates the presence of Stomach Qi in the pulse. The occurrence of symptoms two or three times a day suggests there is no place for the pathogen to reside. This represents the victory of healthy Qi over the pathogen, and medication may not be necessary. However, if the patient has heat predominating over cold, and the pulse is very slight without any sense of relaxation, it indicates a deficiency of Spleen Qi due to insufficient Stomach Qi, termed Spleen disease, signifying extreme deficiency of Yin. Aversion only to cold and not to heat indicates deficiency of Yang in both the Yangming and Taiyang channels. When both Yin and Yang are deficient, one should harmonize Yin and Yang; once harmonized, the disease will resolve spontaneously, and sweating, vomiting, or purging methods should not be employed. If the patient has heat predominating over cold, and the face is uniformly red, it indicates that Yang Qi is constrained on the exterior and unable to disperse. Failure to sweat when sweating is indicated will cause itching; incomplete sweating means the disease is not resolved. Mild sweating should be induced. Therefore, one-third of Guizhi Tang (Cinnamon Twig Decoction) and one-third of Mahuang Tang (Ephedra Decoction) are combined to form half a dose for administration. This approach is taken because after eight or nine days, the healthy Qi is already weakened, yet the pathogen remains unresolved; thus, heavy sweating is contraindicated, but some form of sweating is still required. Hence, this harmonizing method is established. Old editions read "each half," but this has been corrected according to Song dynasty editions.
Mahuang Guizhi Ban Tang (Half Ephedra and Cinnamon Twig Decoction):
Three he of Guizhi Tang (Cinnamon Twig Decoction) and three he of Mahuang Tang (Ephedra Decoction) are mixed to make six he, taken all at once.
Later scholars calculated the dosages and combined them into a single formula, which greatly deviates from Zhang Zhongjing's original intent in formulating prescriptions.
In Taiyang disease, if there is fever and aversion to cold, heat predominating over cold, and a weak pulse, this indicates a lack of Yang; sweating should not be induced. Guizhi Er Yuebi Yi Tang (Two Parts Cinnamon Twig and One Part Yuebi Decoction) is appropriate.
This clause shares the same meaning as the middle section of the previous clause.
The current treatise lacks descriptions of Yuebi syndrome and the prescription for Yuebi Tang. *Jingui Yaolue* (Essential Prescriptions of the Golden Cabinet) contains the Yuebi Tang (Yuebi Decoction) formula; the version found in later compilations that combines these is derived from this. Since Zhang Zhongjing stated that sweating should not be induced, it can be inferred that Ephedrae Herba (Mahuang, 麻黄) is not used; since he mentioned a lack of Yang, it can be inferred that Gypsum Fibrosum (Shigao, 石膏) is not used. Unless the formulas differ, this must be a copying error. It is better to omit the formula than to retain it and cause confusion.
The above discusses the pulse and symptoms of Mahuang Guizhi Ban Tang (Half Ephedra and Cinnamon Twig Decoction).