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Indicated for diarrhea and abdominal pain caused by entrenched cold stagnation in the intestines and stomach. The stagnation should first be purged and removed, followed by regulatory treatment. One must not hesitate to treat due to fear of deficiency, thereby nourishing the disease.

Wenpi Tang (Warm the Spleen Decoction) consists of Guixin (Cinnamon Twig), Fuzi (Aconite Root), and Ganjiang (Dried Ginger), assisted by Houpo (Magnolia Bark), Gancao (Licorice Root), and supplemented with Dahuang (Rhubarb). If diarrhea persists and lingers, it indicates entrenched cold. The combination of warming and purging yields extraordinary efficacy. (Formula: Fuzi, Ganjiang, Gancao, Guixin, and Houpo each 2 qian; Dahuang 4 fen. Decoct in 2 cups of water until 0.6 cup remains, then take.)

Yu Jiayan stated: Xu Shuwei formulated this prescription, deeply aligning with Zhang Zhongjing's principle of "using warm herbs to purge." Without Dahuang in the formula, the warm herbs cannot achieve a purgative effect, and pathogens lingering for a long time cannot be expelled without attack. However, excessive use might overwhelm the warm herbs' control, potentially worsening the diarrhea into severe watery discharge. Therefore, careful dosage adjustment is truly worthy of emulation.

Wind-heat accumulation is severe, presenting as excess patterns in both the exterior and interior, involving all three Jiaos. ○ This method employs simultaneous release of the exterior and purging of the interior.

Fengtong Tongsheng San (Wind-Blocking Unblocking Holy Powder, Liu Hejian). It contains Dahuang (Rhubarb), Xiaoshao (Mirabilite), Jingjie (Schizonepeta), Mahuang (Ephedra), Zhizi (Gardenia), Baishao (White Peony Root), Lianqiao (Forsythia), Gancao (Licorice), Jiegeng (Platycodon), Chuanxiong (Szechwan Lovage Rhizome), Danggui (Angelica Sinensis), Shigao (Gypsum), Huashi (Talcum), Bohe (Mint), Qin (Scutellaria), and Baizhu (Atractylodes Macrocephala Rhizome), possessing strong potency. (Formula: Dahuang [wine-processed], Xiaoshao, Fengfang, Jingjie, Mahuang, Zhizi, Baishao, Lianqiao, Chuanxiong, Danggui, Bohe, Baizhu each 5 fen; Jiegeng, Huangqin, Shigao each 1 qian; Gancao 2 qian; Huashi 3 qian. Decoct with fresh ginger and scallion.)

Wu Hegao said: Fengfang and Mahuang are exterior-releasing herbs. Wind-heat residing in the skin is expelled through sweat upon taking these. Jingjie and Bohe are upper-clearing herbs. Wind-heat residing at the vertex is expelled through the nose. Dahuang and Xiaoshao are purgative herbs. Wind-heat residing in the intestines and stomach is expelled through defecation. Huashi and Zhizi are diuretic herbs. Wind-heat residing in the Jue Du (San Jiao water passages) is expelled through urination. When wind invades the diaphragm, affecting the Lung and Stomach, Shigao and Jiegeng clear Lung and Stomach heat. Meanwhile, Lianqiao and Huangqin dispel wandering fire from various meridians. Pathogenic wind is governed by Liver Wood; Chuanxiong, Danggui, and Baishao harmonize Liver blood. Gancao and Baizhu harmonize Stomach Qi and strengthen the Spleen. Liu Shouzhen was skilled in treating Fire patterns; the intent of this formula is detailed and comprehensive. It also treats macules resulting from hair loss, indicative of excess Fire in the Three Jiaos. The complete formula minus Xiaoshao and Dahuang is called Shuangjie San (Double Release Powder). For releasing the exterior, it uses Fengfang, Mahuang, Bohe, Jingjie, and Chuanxiong; for releasing the interior, it uses Shigao, Huashi, Huangqin, Zhizi, and Lianqiao. Additionally, Danggui and Baishao harmonize Blood, while Jiegeng, Baizhu, and Gancao regulate Qi. With Ying and Wei harmonized and the exterior and interior unobstructed, it is called Double Release. The name Tongsheng emphasizes the miraculous efficacy of its action.

Hejian formulated this to resolve pathogenic factors across the four seasons: winter cold, spring warmth, summer heat, and autumn dryness. In cases of standard Shanghan (Cold Damage) where pathogens remain unresolved in the Taiyang, Yangming, and Shaoyang meridians (Exterior and Interior), use 1.5 liang as a dose, decocted with fresh ginger, scallion, and Danchi (Fermented Soybean). Wait for sweating and purging to occur simultaneously, resolving the Exterior and Interior. For individuals with strong constitution, use 1.5 liang; for those with weak constitution, use 5 qian. If the initial dose fails to resolve symptoms due to insufficient sweating, it indicates Exterior Excess; double the Mahuang to induce sweating. If it fails due to hard stools, it indicates Interior Excess; double Xiaoshao and Dahuang to purge. Administer two consecutive doses until sweating and bowel movement occur, resolving the condition. Modern practitioners fail to understand its brilliance, arguing that Hejian overuses cold-cooling herbs and that Zhang Zhongjing initially avoided purgatives in Shanghan. Consequently, they discard it, which is truly regrettable. They do not realize the method's speed and efficacy, which rarely fail to produce immediate results, and never cause complications of cold-induced palpable masses. Even if one or two cases fail to recover, it is not due to the formula's inadequacy but rather because the pathogen has likely transmitted to the Yangming meridian.