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Shao Yao (Paeoniae Radix), Gan Cao (Glycyrrhizae Radix et Rhizoma), Fu Zi (Aconiti Lateralis Radix Praeparata)

After sweating therapy, if the disease condition is not resolved and there is instead aversion to cold, this indicates a deficiency syndrome. One should administer this decoction. If the disease resolves after sweating, there will be no aversion to cold; if the disease does not resolve after sweating and the exterior excess remains... [Note: The original text appears fragmented here, transitioning into an explanation of herb functions]. Shao Yao (Paeoniae Radix) can astringe body fluids to nourish Ying Qi (Nutritive Energy). Fu Zi (Aconiti Lateralis Radix Praeparata), with its pungent and hot nature, secures Yang Qi to supplement Wei Qi (Defensive Energy). Gan Cao (Glycyrrhizae Radix et Rhizoma) harmonizes sour and pungent flavors, thereby stabilizing Zheng Qi (Upright Qi).

Gui Zhi (Cinnamomi Ramulus), Gan Cao (Glycyrrhizae Radix et Rhizoma), Sheng Jiang (Zingiberis Rhizoma Recens), Da Zao (Jujubae Fructus)

After inappropriate purgation in Tai Yang Disease (Disease of the Tai Yang Channel), if there is a rapid pulse and chest fullness, and if accompanied by slight aversion to cold, add Fu Zi (Aconiti Lateralis Radix Praeparata). The formula is named Gui Zhi Qu Shao Yao Jia Fu Zi Tang (Cinnamon Twig Decoction Modified by Removing Shao Yao and Adding Aconite). Chest fullness is unfavorable to sour-astringent herbs, hence Shao Yao (Paeoniae Radix) is removed. The term "slight aversion to cold" refers not to exterior cold, but to interior cold; therefore, Fu Zi (Aconiti Lateralis Radix Praeparata) is added to dispel cold and eliminate fullness.

Gui Zhi (Cinnamomi Ramulus), Huang Qin (Scutellariae Radix), Ren Shen (Ginseng Radix), Gan Cao (Glycyrrhizae Radix et Rhizoma), Shao Yao (Paeoniae Radix), Sheng Jiang (Zingiberis Rhizoma Recens), Da Zao (Jujubae Fructus), Chai Hu (Bupleuri Radix), Ban Xia (Pinelliae Rhizoma)

In Shang Han (Cold Damage) disease, on the sixth or seventh day, symptoms include fever, slight aversion to cold, discomfort and pain in the limbs and joints, slight vomiting, and a sensation of support and obstruction in the epigastrium ("Zhi Jie"). This indicates that the exterior syndrome has not yet resolved. By the sixth or seventh day of Shang Han, the pathogen is at the time when it should transmit inward. At this stage, one may treat the interior by administering Chai Hu Gui Zhi Tang (Bupleurum and Cinnamon Twig Decoction) to harmonize the exterior and interior. Zhang Zhongjing stated: When exterior symptoms are unresolved and there is a feeling of oppression in the epigastrium, it is called "Zhi Jie" (Supporting Obstruction), not "Pi" (Glomus/Blockage). This distinction must not be overlooked.

Zhi Mu (Anemarrhenae Rhizoma), Shi Gao (Gypsum Fibrosum), Gan Cao (Glycyrrhizae Radix et Rhizoma), Jing Mi (Oryza Sativa Var. Glutinosa)

After emesis or purgation, if the disease persists for seven or eight days without resolution, heat is consolidated within the interior, presenting as heat in both the exterior and interior, a floating and slippery pulse, severe thirst, and irritability. According to Zhang Zhongjing: "In Shang Han, a floating and slippery pulse indicates heat in the exterior and cold in the interior; Bai Hu Tang (White Tiger Decoction) governs this." I suspect this statement contains an error. He also stated: "Heat consolidated in the interior, with heat in both exterior and interior, and severe thirst for water, is governed by Bai Hu Tang (White Tiger Decoction)." Furthermore, he said: "If the exterior is not resolved, Bai Hu Tang (White Tiger Decoction) must not be given." Additionally, in the Yang Ming disease section, it states: "Heat in the exterior and cold in the interior are governed by Si Ni Tang (Frigid Extremities Decoction)." In the Shao Yang disease section, it states: "Cold in the interior and heat in the exterior are governed by Tong Mai Si Ni Tang (Pulse-Resuscitating Frigid Extremities Decoction)." From this, it is known that his mention of "floating and slippery pulse, heat in the exterior and cold in the interior" likely involves a transcription error swapping "exterior" and "interior." Even judging solely by Zhang Zhongjing's other discussions, how could interior cold warrant the use of a major cold-decoction? How could interior cold present with a floating and slippery pulse? How could interior cold present with severe heat, irritability, and thirst? Therefore, it is understood that Bai Hu Tang (White Tiger Decoction) is designed for major heat in the Yang Ming channel. The phrase "cold in the interior" is definitely erroneous. Cheng Wuji's commentary following the text misled later generations, necessitating this detailed clarification. Bai Hu (White Tiger) is the Metal Spirit of the West, corresponding to Autumn and belonging to the Lung. When there is heat in both exterior and interior, Metal is imprisoned by Fire; thus, acrid-cold herbs are used to rescue the Lung, which is why it is named Bai Hu Tang (White Tiger Decoction). *Huo Ren* (The Life-Saving Manual) suggests that in summer, Yin Qi is internal, so one should abstain from Bai Hu Tang (White Tiger Decoction); *Ming Li Lun* (Treatise on Clear Principles) states it should not be taken after Start of Autumn, fearing that the major cold of Bai Hu Tang (White Tiger Decoction) will cause weakness, emaciation, and loss of appetite. Both views are biased. When there is the disease, one should take the corresponding medicine; how can one be constrained by the season? Suppose a disease occurs in autumn or winter; if there are no exterior symptoms but rather severe heat, irritability, and thirst, then Bai Hu Tang (White Tiger Decoction) should be given as an excellent对症 (symptom-matching) remedy. Although one might wish to avoid using it, is it possible?