Shenjie San for Damp-Heat Syndrome in Warm Diseases

"Shenjie San" comes from Wenbing Tiaobian (Systematic Identification of Warm Diseases). It is an empirical formula of Wu Jutong, the great Qing-dynasty master of warm-disease medicine. Its composition is: Bai Jiangcan (Bombyx Batryticatus, fried in wine), 1 qian (3 g); Chantui (Cicadae Periostracum), 5 pieces; Shenqu (Massa Medicata Fermentata), 3 qian (9 g); Jinyinhua (Lonicerae Flos), 2 qian (6 g); Shengdihuang (raw Rehmanniae Radix), 2 qian (6 g); Mutong (Akebiae Caulis), Cheqianzi (Plantaginis Semen, fried and ground), Huangqin (Scutellariae Radix, fried in wine), Huanglian (Coptidis Rhizoma), Huangbo (Phellodendri Cortex, fried in salt water), and Jiegeng (Platycodi Radix), each 1 qian (3 g). Decoct in water and strain; add an appropriate amount of yellow rice wine and 3 spoonfuls of honey, mix well, and take cold, three times daily. Wenbing Tiaobian says this formula "clears heat and vents pathogen, resolves toxin and drains fire." It treats warm disease when the patient first feels aversion to cold and bodily heaviness, high fever and headache, weakness of the limbs, generalized aching, bitter mouth and dry throat, and fullness and oppression in the chest and abdomen. This is a complex post-infection syndrome—fever, fatigue, and chills together with aching limbs and bodily heaviness, plus digestive symptoms: bitter mouth, dry throat, and chest-and-abdominal fullness and oppression. The warm-disease school considers this a damp-heat syndrome, in which damp and heat are mixed together like oil and flour; treatment should proceed by clearing heat and draining dampness in parallel. In this formula, Chantui, Jinyinhua, Shengdihuang, Huangqin, Huanglian, and Huangbo are all heat-clearing, toxin-resolving, and heat-cooling-blood herbs, mainly clearing heat and draining fire. Mutong and Cheqianzi are water-disinhibiting herbs, mainly dispelling dampness. When damp combines with heat, phlegm is sure to arise: Jiangcan extinguishes wind and stops spasms, resolves phlegm and dissipates nodules; Jiegeng diffuses the lung and benefits the throat, dispels phlegm and expels pus—these two mainly resolve phlegm. Shenqu strengthens the stomach and harmonizes the center, relieving chest-and-abdominal fullness. When the herbs are combined, they relieve the patient's many symptoms. The compositional logic of this formula draws on that of Shengjiang San (composed of Jiangcan, Chantui, Jianghuang, and Dahuang), which treats large-head warmth with triple-burner fire exuberance and various discomforts, and of Huanglian Jiedu Decoction (composed of Huanglian, Huangqin, Huangbo, and Zhizi), which treats triple-burner fire exuberance with great heat and agitation, vomiting and diarrhea. Thus this formula also mainly treats triple-burner fire-exuberance syndrome, though its symptoms lean toward damp-heat. These essentially belong to symptoms caused by infectious diseases; food poisoning in summer and autumn can also cause fever, nausea, vomiting, and body aches, and such conditions may all be treated symptomatically with Shenjie San.