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Gancao (Radix Glycyrrhizae, four liang, honey-fried) Ganjiang (Rhizoma Zingiberis Preparatum, two liang, processed)
Crush the above ingredients. Boil in three sheng of water until one sheng and five he remain. Strain off the dregs. Divide into two doses and take warm.

Shaoyao (Radix Paeoniae Alba, four liang) Gancao (Radix Glycyrrhizae, four liang, honey-fried)
Crush the above ingredients. Boil in three sheng of water until one sheng and half remain. Strain off the dregs. Divide into two doses and take warm.

Question: The symptoms resemble Yangdan Syndrome (i.e., Guizhi Tang Syndrome). Following the appropriate treatment method, the condition worsened, presenting with Jue Ni (cold extremities), dryness in the throat, spasms in both calves, and delirium. The Master said that at midnight, the hands and feet would become warm, and the legs would extend. This later happened exactly as predicted. How was this known?
Answer: The Cun Kou pulse is floating and large. A floating pulse indicates Wind pathogen; a large pulse indicates Deficiency. Wind pathogen generates slight fever; Deficiency causes spasms in both calves. The symptom pattern resembles Guizhi Tang Syndrome, so Fuzi (Radix Aconiti Lateralis Preparata) was added to the formula, and the dosage of Guizhi (Ramulus Cinnamomi) was increased to induce sweating. This is because Fuzi warms the meridians, but excessive sweating led to the loss of Yang Qi, resulting in cold extremities, dry throat, and irritability. At this point, Yangming internal binding occurred, causing delirium and mental confusion. Administering Gancao Ganjiang Tang again, by midnight, Yang Qi returned, and the feet became warm. Although the calves remained slightly spasmodic, administering Shaoyao Gancao Tang subsequently allowed the calves to extend. Then, using Chengqi Tang to induce mild loose stools stopped the delirium. Therefore, it was known that the disease could be cured.

This reiterates the previous chapter using a Q&A format. "Symptoms resembling Yangdan" is synonymous with "symptoms resembling Guizhi." (In *Jin Gui Yao Lue*, it is recorded that postpartum wind-strike lasting dozens of days without resolution, with headache, aversion to cold, intermittent fever, dry retching, and sweating, even if prolonged, the Yangdan syndrome persists and can be treated with Yangdan Tang. Lin Yi considered Yangdan Tang to be identical to Guizhi Tang; based on the symptoms, it is undoubtedly Guizhi Tang.) "Following the appropriate treatment method" refers to using Guizhi Tang to attack the exterior in the previous chapter, and in this chapter, adding Fuzi and increasing Guizhi to induce sweating. The Cun Kou pulse being floating and large—floating indicating Wind and large indicating Deficiency—is documented in Pulse Methods (*Mai Fa*): "Cun Kou pulse floating and tight, floating indicates Wind, tight indicates Cold; pulse wiry and large, large indicates Kou [empty], Kou indicates Deficiency." This is what is meant by "Wind implies floating and deficiency" (*Mai Fa* language). Wind generates slight fever, and deficiency causes calf spasms. The illness matches the image of Guizhi Tang syndrome, and since the fever is slight and leg spasms suggest Yang deficiency, Guizhi was increased and Fuzi added to release the exterior. Fuzi warms the meridians, but excessive sweating caused Yang collapse, leading to cold extremities, dry throat, and irritability. Sweating depleted fluids, causing stomach dryness and binding, leading to delirium and confusion. If one does not realize that the floating and large Cun Kou pulse actually indicates Yangming interior excess (as stated in the *Yangming Chapter*: "Hard stool, floating and slow pulse, is Yangming disease; after three days of cold damage, the Yangming pulse is large; combined three-yang disease, the pulse is floating and large") rather than Taiyang exterior deficiency, mistakenly using Guizhi and Fuzi to sweat will further deplete Yang, transforming interior excess into interior deficiency. Drinking Gancao Ganjiang Tang restores Yang and warms the feet; administering Shaoyao Gancao Tang extends the calves; giving a small amount of Tiaowei Chengqi Tang turns bound stool into mild loose stools, stopping delirium. The medicine is excellent, the method is precise, and recovery is immediate. How could this not be known? (Yu Jiayan misunderstood Yangdan Tang and Yindan Tang, claiming that Guizhi Tang with Huangqin (Scutellariae Radix) is Yangdan Tang and Guizhi Tang with extra Guizhi is Yindan Tang. Applying this method leads to the error of cold extremities due to the use of Huangqin. Zhang Zhongjing originally used the Guizhi method, increasing Guizhi to induce sweating, and adding Fuzi to warm the meridians, which is extremely absurd and erroneous. Later medical books followed this saying, recording both Yangdan and Yindan formulas, which is extremely ignorant. Zhang Zhongjing naturally had Guizhi Jia Guizhi Tang, not named Yindan. The name Yindan is absurd and bizarre, representing speculation without knowledge.)