论曰人居天地间。禀气于阴阳。气和则安，气 则病。故一岁之内。节气不和。寒暑乖
候，皆为疫疠之气。感而为病，故名疫疠，其状无问长少，率皆相似。俗又名天行，其病与
时气温热等病相类，治各随其证，以方制之。
治疫疠病，头痛壮热恶寒不解。神明白散方
白术（锉炒二两） 桔梗 细辛（去苗叶各一两） 附子（炮裂去皮脐二两） 乌头（炮
裂去
皮脐四两）
上五味，捣罗为散，以绢囊盛带之，居闾里间，皆无病，有病疫疠者，温酒服方寸匕，
覆取汗，或得吐即瘥。若经三四日，抄三钱匕，水二盏，煎一盏半，去滓分温三服。
治时行疫疠，壮热咳嗽，头痛心闷。前胡汤方
前胡（去芦头） 升麻 麦门冬（去心焙各三分） 贝母（去心） 紫菀（去苗土） 杏
仁（去
皮尖双仁炒研各半两甘草炙一分） 石膏（一两一分）
上八味，粗捣筛。每服三钱匕，水一盏，竹叶二七片，煎至七分，去滓不拘时温服。
治伤寒，辟毒瓦斯疫病。七物赤散方
丹砂（别研） 乌头（炮裂去皮脐各二两） 细辛（去苗叶） 羊踯躅 干姜（炮裂） 白
术
（切炒各一两） 栝蒌（一两半）
上七味，捣罗为散，每服半钱匕，温酒调服，汗出解，不解增至一钱匕。
治时行疫疠病，头痛体热渴燥，百骨节疼痛。麻黄汤方
麻黄（去根节） 葛根（锉各一两） 黄芩（去黑心） 栀子仁 芍药 杏仁（去皮尖
双仁炒
各三分）
上六味，粗捣筛，每服三钱匕，水一盏，入豉五十粒，同煎至七分，去滓温服。
治时行疫疠兼风热，目疼心中妨闷。葛根汤方
葛根（一两） 芍药（三分） 葱白（三茎切） 豉（半合）
上四味，锉如麻豆，用水三盏 煎至一盏半，去滓分温二服。
治时行疫疠病，壮热头痛唇干。石膏汤方
石膏（碎一两） 葛根（锉三分） 芍药 贝母（去心） 百合 升麻（各半两） 栀
子仁 甘草（炙各一分）
上八味，粗捣筛，每服三钱匕，水一盏半，豆豉五十粒，葱白三寸，同煎至一盏，去滓
温服。
治时行疫疠，一二日头疼壮热烦躁。麻黄解肌汤方
麻黄（去根节） 升麻 甘草（炙锉） 芍药 石膏（碎各一两） 杏仁（去皮尖双仁
炒研半两） 贝齿（烧一分）
上七味，粗捣筛，每服五钱匕，水一盏半，煎至一盏，去滓不计时候温服。
治时行疫疠，未经汗下，体热烦闷。桂心汤方
桂（去粗皮三分） 芍药（一两） 麻黄（去根节） 杏仁（去皮尖双仁炒研） 黄芩
（去黑心） 甘草（炙各半两）
上六味，粗捣筛，每服三钱匕，水一盏，生姜三片，枣一枚劈，煎至七分，去滓温服。
治时行疫疠，壮热恶寒，食即呕吐。前胡汤方
前胡（去芦头） 生干地黄（焙） 麦门冬（去心焙） 陈橘皮（汤浸去白焙） 甘草
（炙） 人参（各半两）
上六味，粗捣筛，每服三钱匕。水一盏，竹叶七片，煎至七分，去滓温服。
治时行疫疠，发表攻里不尽，形证尚在，其人垂死不疗者。苦参汤方
苦参（二两）
上一味，粗捣筛，每服三钱匕，酒一盏，煎至半盏，去滓顿服即瘥。
治时行疫疠病，数日未得汗，浑身壮热，呕逆不下食，柴胡汤方
柴胡（去苗一两） 麻黄（去根节一两半） 升麻（一两） 桂（去粗皮三分） 大黄
（锉炒一两） 甘草（炙三分） 鳖甲（醋炙去裙 一两一分） 枳实（去瓤麸炒） 知母
（焙各三分） 栀子仁（一分）
上一十味，粗捣筛，每服五钱匕，水一盏半，入生姜三片，煎至七分，去滓温服。
治时行瘟疫，恶气热毒攻心胁，气满胀急，及注忤鬼气。沉香丸方
沉香锉 丁香 薰陆香（各半两） 犀角屑 升麻 木香 羚羊角屑 黄芩（去黑心） 栀
子仁（各三分） 麝香（研一钱） 鬼臼 芒硝 大黄（锉炒各一两）
上一十三味，捣研为末令匀，炼蜜和丸，如梧桐子大，每服十丸至二十丸，米饮下。
治时行疫疠。一二日头痛壮热。柴胡汤方
柴胡（去苗一两） 芍药（一两） 栀子仁 黄芩（去黑心各半两） 石膏（碎） 葛
根（锉各一两）
上六味，粗捣筛，每服五钱匕，水一盏半，葱白三寸。豉三十粒，煎至七分去滓。不计
时候温服。
治疫疠病，始得之，头疼壮热。葱豉汤方
葱白（二茎细切） 豉（一合） 蜀椒（四十九粒去目并闭口炒出汗）
上三味，粗捣筛，水三盏，煎至二盏，去滓顿热服，汗出瘥，未愈更煎服。
治疫疠病壮热烦躁，头疼体痛。救生散方
人参 五味子 白术（各半两） 麻黄（去根节三两） 桂（去粗皮） 浓朴（去粗皮
姜汁炙） 大黄（锉炒各一两） 附子（炮裂去皮脐半两） 甘草（炙半两）
上九味，捣罗为散。每服二钱匕。新汲水调下。后用热水漱。良久吃生姜热茶一盏。投
以衣被覆之。如阳毒汗出。阴毒泻下立瘥。
治天行时疫，三二日内。未经汗下。术豉汤方
苍术（炒五两 豉炒三两半） 麻黄（去根节二两）
上三味，粗捣筛，每服三钱匕，水一大盏，煎至七分，去滓热服，盖覆出汗，未汗再服。
It is stated that humans live between heaven and earth, inheriting Qi (vital energy) from Yin and Yang. When Qi is harmonious, the body is at peace; when Qi is disharmonious, disease occurs. Therefore, within a year, if the solar terms are not in harmony and the climate of cold and heat deviates from the normal pattern, these all constitute the pathogenic factors of Yi Li (epidemic diseases). When the human body contracts these pathogens and becomes ill, it is named Yi Li. Its symptoms are generally similar regardless of age or seniority. In common parlance, it is also called "Tian Xing" (Heavenly Transmission). These illnesses are similar to seasonal warm-heat diseases. Treatment should be tailored to each specific syndrome using appropriate prescriptions.
For treating Yi Li disease presenting with headache, high fever, aversion to cold that does not resolve, use Shen Ming Bai San Formula.
Ingredients: Baizhu (Atractylodis Macrocephalae Rhizoma, chopped and stir-fried, 2 liang), Jiegeng (Platycodonis Radix), Xixin (Asari Radix et Rhizoma, removed seedlings and leaves, 1 liang each), Fuzi (Aconiti Lateralis Radix Praeparata, cracked by frying, skin and umbilicus removed, 2 liang), Wutou (Aconiti Radix, cracked by frying, skin and umbilicus removed, 4 liang).
The above five herbs are crushed, sifted into a powder, and stored in a silk bag to be worn around the waist. People living in villages will remain healthy. For those already suffering from Yi Li, take one Fang Cun Bi (a measure approx. 2-3 grams) of the powder with warm wine. Cover with blankets to induce sweating, or until vomiting occurs, which indicates recovery. If three to four days have passed, take three Qian Bi (approx. 5-9 grams) of the powder, add two Zhan (approx. 400ml) of water, decoct to one and a half Zhan, remove dregs, and divide into three warm doses.
For treating Shi Xing Yi Li (seasonal epidemic) presenting with high fever, cough, headache, and chest oppression, use Qian Hu Tang Formula.
Ingredients: Qianhu (Peucedani Radix, removed rhizome head), Shengma (Cimicifugae Rhizoma), Maimendong (Ophiopogonis Radix, heart removed, dried, 3 fen each), Beimu (Fritillariae Cirrhosae Bulbus, heart removed), Ziwan (Asternis Radix, removed seedlings and soil), Xingren (Armeniacae Semen, skin and tip removed, double-kernel fried and ground, 0.5 liang), Gancao (Licorice Root, honey-fried, 1 fen), Shigao (Gypsum Fibrosum, 1 liang 1 fen).
The above eight herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add one Zhan of water and fourteen slices of Zhuye (Bamboo Leaf), decoct to 70% volume, remove dregs, and take warm at any time.
For treating Shang Han (Cold Damage) and warding off toxic vapors and epidemics, use Qi Wu Chi San Formula.
Ingredients: Dansha (Cinnabar, separately ground), Wutou (Aconiti Radix, cracked by frying, skin and umbilicus removed, 2 liang), Xixin (Asari Radix et Rhizoma, removed seedlings and leaves), Yangzhizhu (Daphnes Genkwa Flower), Jiangjiang (Zingiberis Rhizoma Dried, cracked by frying), Baizhu (Atractylodis Macrocephalae Rhizoma, sliced and fried, 1 liang each), Gualou (Trichosanthis Fructus, 1.5 liang).
The above seven herbs are crushed, sifted into a powder. Take half a Qian Bi per dose, mix with warm wine. Recovery occurs with sweating; if not resolved, increase the dose to one Qian Bi.
For treating Shi Xing Yi Li presenting with headache, body heat, thirst, dryness, and pain in all bone joints, use Mahuang Tang Formula.
Ingredients: Mahuang (Ephedrae Herba, removed root nodes), Gegen (Puerariae Lobatae Radix, chopped, 1 liang each), Huangqin (Scutellariae Radix, removed black heart), Zhizi Ren (Gardeniae Semen), Shaoyao (Paeoniae Radix), Xingren (Armeniacae Semen, skin and tip removed, double-kernel fried, 3 fen each).
The above six herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add one Zhan of water and fifty grains of Chishao (Fermented Soybean), decoct together to 70% volume, remove dregs, and take warm.
For treating Shi Xing Yi Li complicated by wind-heat, presenting with eye pain and mental discomfort/oppression, use Gegen Tang Formula.
Ingredients: Gegen (Puerariae Lobatae Radix, 1 liang), Shaoyao (Paeoniae Radix, 3 fen), Congbai (Allii Fistulosi Bulb, three stalks, chopped), Chi (Fermented Soybean, 0.5 he).
The above four herbs are chopped like hemp seeds. Add three Zhan of water, decoct to one and a half Zhan, remove dregs, and divide into two warm doses.
For treating Shi Xing Yi Li presenting with high fever, headache, and dry lips, use Shigao Tang Formula.
Ingredients: Shigao (Gypsum Fibrosum, crushed, 1 liang), Gegen (Puerariae Lobatae Radix, chopped, 3 fen), Shaoyao (Paeoniae Radix), Beimu (Fritillariae Cirrhosae Bulbus, heart removed), Baihe (Lilii Bulbus), Shengma (Cimicifugae Rhizoma, 0.5 liang each), Zhizi Ren (Gardeniae Semen), Gancao (Licorice Root, honey-fried, 1 fen each).
The above eight herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add one and a half Zhan of water, fifty grains of Douchi (Fermented Soybean), and three cun of Congbai (Allii Fistulosi Bulb). Decoct to one Zhan, remove dregs, and take warm.
For treating Shi Xing Yi Li presenting with headache, high fever, and irritability within one or two days of onset, use Mahuang Jieji Tang Formula.
Ingredients: Mahuang (Ephedrae Herba, removed root nodes), Shengma (Cimicifugae Rhizoma), Gancao (Licorice Root, honey-fried and chopped), Shaoyao (Paeoniae Radix), Shigao (Gypsum Fibrosum, crushed, 1 liang each), Xingren (Armeniacae Semen, skin and tip removed, double-kernel fried and ground, 0.5 liang), Beichi (Concha Meretricis, calcined, 1 fen).
The above seven herbs are coarsely crushed and sifted. Take five Qian Bi per dose, add one and a half Zhan of water, decoct to one Zhan, remove dregs, and take warm at any time.
For treating Shi Xing Yi Li where sweating or purgation has not been performed, presenting with body heat, irritability, and oppression, use Guixin Tang Formula.
Ingredients: Gui (Cinnamomi Cortex, removed coarse bark, 3 fen), Shaoyao (Paeoniae Radix, 1 liang), Mahuang (Ephedrae Herba, removed root nodes), Xingren (Armeniacae Semen, skin and tip removed, double-kernel fried and ground), Huangqin (Scutellariae Radix, removed black heart), Gancao (Licorice Root, honey-fried, 0.5 liang each).
The above six herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add one Zhan of water, three slices of Shengjiang (Zingiberis Rhizoma Recens), and one split Zao (Jujubae Fructus). Decoct to 70% volume, remove dregs, and take warm.
For treating Shi Xing Yi Li presenting with high fever, aversion to cold, and vomiting immediately after eating, use Qian Hu Tang Formula.
Ingredients: Qianhu (Peucedani Radix, removed rhizome head), Shenggan Dihuang (Rehmanniae Radix Preparata, dried), Maimendong (Ophiopogonis Radix, heart removed, dried), Chenjuapi (Citri Reticulatae Pericarpium, soaked in water, white pith removed, dried), Gancao (Licorice Root, honey-fried), Renshen (Ginseng Radix, 0.5 liang each).
The above six herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add one Zhan of water and seven slices of Zhuye (Bamboo Leaf). Decoct to 70% volume, remove dregs, and take warm.
For treating Shi Xing Yi Li where exterior-releasing and interior-purging methods were incomplete, with symptoms persisting, and the patient on the verge of death without treatment, use Kushen Tang Formula.
Ingredients: Kushen (Sophorae Flavescentis Radix, 2 liang).
The above single herb is coarsely crushed and sifted. Take three Qian Bi per dose, add one Zhan of wine, decoct to half a Zhan, remove dregs, and take in one dose for recovery.
For treating Shi Xing Yi Li where sweating has not occurred for several days, presenting with whole-body high fever, retching, and inability to eat, use Chaihu Tang Formula.
Ingredients: Chaihu (Bupleuri Radix, removed seedlings, 1 liang), Mahuang (Ephedrae Herba, removed root nodes, 1.5 liang), Shengma (Cimicifugae Rhizoma, 1 liang), Gui (Cinnamomi Cortex, removed coarse bark, 3 fen), Dahuang (Rhei Radix et Rhizoma, chopped and fried, 1 liang), Gancao (Licorice Root, honey-fried, 3 fen), Biejia (Testudinis Carapax et Plastrum, vinegar-fried, apron removed, 1 liang 1 fen), Zhishi (Aurantii Fructus Immaturus, pulp and bran removed, stir-fried), Zhimu (Anemarrhenae Rhizoma, dried, 3 fen each), Zhizi Ren (Gardeniae Semen, 1 fen).
The above ten herbs are coarsely crushed and sifted. Take five Qian Bi per dose, add one and a half Zhan of water and three slices of Shengjiang (Zingiberis Rhizoma Recens). Decoct to 70% volume, remove dregs, and take warm.
For treating Shi Xing Wen Yi (seasonal plague) where evil qi and hot toxins attack the heart and hypochondrium, causing fullness, distension, urgency, and Zhu Wu Gui Qi (sudden attacks attributed to malevolent spirits/toxins), use Chenxiang Wan Formula.
Ingredients: Chenxiang (Aquilariae Lignum Resinatum, chopped), Dingxiang (Syzygdii Flos), Xunluxiang (Boswelliae Resina, 0.5 liang each), Xijiao Xie (Rhinocerotis Cornu, shaved), Shengma (Cimicifugae Rhizoma), Muxiang (Aucklandiae Radix), Lingyangjiao Xie (Saigae Tataricae Cornu, shaved), Huangqin (Scutellariae Radix, removed black heart), Zhizi Ren (Gardeniae Semen, 3 fen each), Shexiang (Moscus, ground, 1 qian), Guijiao (Podophylli Fructus), Mangxiao (Natrii Sulfas), Dahuang (Rhei Radix et Rhizoma, chopped and fried, 1 liang each).
The above thirteen herbs are crushed, ground into fine powder, mixed evenly, and bound with refined honey into pills the size of Sophora seeds. Take ten to twenty pills per dose, washed down with rice drink.
For treating Shi Xing Yi Li presenting with headache and high fever within one or two days, use Chaihu Tang Formula.
Ingredients: Chaihu (Bupleuri Radix, removed seedlings, 1 liang), Shaoyao (Paeoniae Radix, 1 liang), Zhizi Ren (Gardeniae Semen), Huangqin (Scutellariae Radix, removed black heart, 0.5 liang each), Shigao (Gypsum Fibrosum, crushed), Gegen (Puerariae Lobatae Radix, chopped, 1 liang each).
The above six herbs are coarsely crushed and sifted. Take five Qian Bi per dose, add one and a half Zhan of water, three cun of Congbai (Allii Fistulosi Bulb), and thirty grains of Chi (Fermented Soybean). Decoct to 70%, remove dregs, and take warm at any time.
For treating Yi Li disease at the initial stage presenting with headache and high fever, use Congchi Tang Formula.
Ingredients: Congbai (Allii Fistulosi Bulb, two stalks, finely chopped), Chi (Fermented Soybean, 1 he), Shujiao (Zanthoxyli Pericarpium, forty-nine grains, eyes and closed-mouth ones removed, fried until oil sweats out).
The above three herbs are coarsely crushed and sifted. Add three Zhan of water, decoct to two Zhan, remove dregs, and take hot in one dose. Recovery occurs with sweating; if not cured, decoct and take again.
For treating Yi Li presenting with high fever, irritability, headache, and body pain, use Jiusheng San Formula.
Ingredients: Renshen (Ginseng Radix), Wuweizi (Schisandrae Chinensis Fructus), Baizhu (Atractylodis Macrocephalae Rhizoma, 0.5 liang each), Mahuang (Ephedrae Herba, removed root nodes, 3 liang), Gui (Cinnamomi Cortex, removed coarse bark), Houpo (Magnoliae Officinalis Cortex, removed coarse bark, ginger juice-fried), Dahuang (Rhei Radix et Rhizoma, chopped and fried, 1 liang each), Fuzi (Aconiti Lateralis Radix Praeparata, cracked by frying, skin and umbilicus removed, 0.5 liang), Gancao (Licorice Root, honey-fried, 0.5 liang).
The above nine herbs are crushed, sifted into a powder. Take two Qian Bi per dose, mix with fresh drawn water. Rinse mouth with warm water afterward. After some time, drink one cup of hot tea with ginger. Cover with clothing and blankets. For Yang Du (Yang Toxin), recovery follows sweating; for Yin Du (Yin Toxin), recovery follows diarrhea.
For treating Tian Xing Shi Yi (heavenly transmission seasonal plague) within two or three days of onset, before sweating or purgation, use Shuchi Tang Formula.
Ingredients: Cangzhu (Atractylodis Rhizoma, stir-fried, 5 liang), Chi (Fermented Soybean, stir-fried, 3.5 liang), Mahuang (Ephedrae Herba, removed root nodes, 2 liang).
The above three herbs are coarsely crushed and sifted. Take three Qian Bi per dose, add a large Zhan of water, decoct to 70%, remove dregs, and take hot. Cover to induce sweating; if no sweat, take again.