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(From Zhang Yuansu's formula) Treats *Lianggan Shanghan* (Two-meridian simultaneous attack by cold damage).
Qianghuo (Notopterygii Rhizoma et Radix), Duhuo (Angelicae Pubescentis Radix), Fangfeng (Saposhnikoviae Radix), Xixin (Asari Radix et Rhizoma), Fangji (Stephaniae Tetrandrae Radix), Huangqin (Scutellariae Radix), Huanglian (Coptidis Rhizoma), Cangzhu (Atractylodis Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma), Gancao (Glycyrrhizae Radix et Rhizoma) (each 3 qian), Zhimu (Anemarrhenae Rhizoma), Chuanxiong (Ligustici Chuanxiong Rhizoma), Shengdi (Rehmanniae Radix) (each 1 liang). Take 5 qian per dose, decoct in water and drink hot.
The song for Da Qianghuo Tang is: "Jiuwei Qianghuo removes Bai Zhi, adds Fang Ji, Du Huo, Zhi Mu, Lian Lian, Bai Zhu." (That is, Jiuwei Qianghuo Decoction minus Bai Zhi, plus the aforementioned herbs.) It dissipates heat and nourishes yin, harmonizing the exterior and interior. (Qianghuo, Duhuo, Cangzhu, Fangfeng, and Xixin release the exterior and disperse pathogens; Huangqin, Huanglian, Fangji, Zhimu, Chuanxiong, and Shengdi clear the interior and nourish yin; Baizhu and Gancao stabilize the middle jiao to harmonize the exterior and interior.) The treatment of Lianggan Shanghan brings some comfort. (Regarding Lianggan Shanghan: On the first day, Taiyang and Shaoyin meridians are simultaneously diseased, presenting with headache, dry mouth, irritability, and fullness; on the second day, Yangming and Taiyin meridians are simultaneously diseased, presenting with abdominal fullness, fever, anorexia, and delirium; on the third day, Shaoyang and Jueyin meridians are simultaneously diseased, presenting with deafness, retraction of the testicles, and cold extremities, inability to take fluids, and unconsciousness, leading to death on the sixth day, because both exterior and interior, yin and yang are diseased, hence it is fatal. Wu Hegao in *Yifang Kao* stated: "If the pathogenic invasion is shallow, it may possibly be resolved." According to Qian Zhen: "Lianggan cases are originally simultaneous diseases of the exterior and interior. Although they seem to refer solely to external infections, this is not always the case. It is precisely because both internal and external factors cause injury that it is called Lianggan. Currently, we see cases where Shaoyin fails internally first, followed by Taiyang externally; this is Lianggan caused by indulgence in desires. When Taiyin is injured internally, and Yangming is re-infected externally; this is Lianggan caused by fatigue, overexertion, and irregular diet. When Jueyin qi rebels within the zang organs, and Shaoyang disease occurs again in the fu organs; this is Lianggan caused by imprudent emotions, exhausted sinews, and corrupted blood." These words most accurately describe this disease, truly revealing insights previously unexpressed by predecessors. Some say Lianggan is rare, which is likely due to unclear observation. The treatment method lies in understanding the cause to rescue the root.)

(Wang Haogu's *Yin Zheng Lue Li*) Treats external contraction of cold evil and internal injury from raw/cold food, presenting with fever and absence of sweating; this serves as a substitute for Mahuang Tang. It also treats Pi Xie (Spleen diarrhea) and Chang Feng (intestinal wind/blood in stool).
Cangzhu (2 liang, processed), Fangfeng (2 liang), Gancao (1 liang, honey-fried), Shengjiang (Fresh Ginger), Congbai (Scallion White), decoct in water and take orally. (If the aforementioned symptoms present with sweating, remove Cangzhu and Congbai, add Baizhu 2 liang, named Baizhu Tang, serving as a substitute for Guizhi Tang. Note: Cangzhu and Baizhu have similar therapeutic indications, differing specifically in that one stops sweating while the other induces sweating.)