夫热病四日。太阴受病。太阴者三阴之首也。三阳受病讫。传入于阴。故毒瓦斯入于胸膈
。其病咽喉干。胸膈满。故可吐而愈也。
治热病四日。结胸满痛壮热。身体疼痛。宜服苦参散令吐方。
苦参（半两锉） 恒山（半两）
上件药。捣筛为散。以水二中盏。煎至一盏。去滓。不计时候。尽饮之。当吐即愈。未
吐再服。
治热病四日。咽喉干而腹满。宜服瓜蒂散吐方。
瓜蒂（一分） 赤小豆（一两）
上件药。捣粗罗为散。每服二钱。以水一中盏。煎至五分。去滓。不计时候温服。以吐
为度。
治热病四日。壮热。四肢沉重。吃食不下。宜服柴胡散方。
柴胡（一两去苗） 葛根（一两锉） 川大黄（一两锉碎微炒） 石膏（一两） 赤芍
药（三分）
黄
微赤锉） 鳖甲
）
上件药。捣粗罗为散。每服五钱。以水一大盏。煎至五分。去滓。不计时候。温服。
治热病四日。毒瓦斯内攻。身体疼痛。壮热头重。烦渴不止。宜服麻黄散方。
麻黄（一两去根节） 桂心（半两） 川大黄（三分锉碎微炒） 茵陈（一两） 细辛
（半两）
柴胡（半两去苗） 甘草（半两炙微赤锉） 栝蒌根（一两）
上件药。捣粗罗为散。每服五钱。以水一大盏。煎至五分。去滓。不计时候。温服。
治热病四日。发汗不瘥。身体壮热。心膈烦闷。不得睡卧。宜服葛根散方。
葛根（二两锉） 龙胆（半两去芦头） 大青（半两） 桂心（半两） 甘草（半两炙
微赤锉）
麻
升麻（一两）
上件药。都捣粗罗为散。每服四钱。以水一大盏。煎至五分。去滓。不计时候。温服。
治热病四日。头痛胸满。食即呕逆。宜服竹茹散方。
竹茹（一两） 陈橘皮（一两汤浸去白瓤焙） 葛根（一两锉） 人参（一两去芦头） 芦
根（
一两锉） 枇杷叶（半两拭去毛炙微黄）
上件药。捣粗罗为散。每服五钱。以水一大盏。入粳米一百粒。生姜半分。煎至五分。
去滓。不计时候。温服。
治热病四日。热毒解后。时来时往。恶寒微热。不能食。宜服人参散方。
人参（一两去芦头） 知母（一两） 枳实（一两麸炒令微黄） 陈橘皮（一两汤浸去
白瓤）
栀子仁（一两） 槟榔（一两） 豉（三两微炒变色） 甘草（一两炙微赤锉）
上件药。捣粗罗为散。每服五钱。以水一大盏。煎至五分。去滓。不计时候。温服。
热病发展到第四天，太阴经受邪。太阴经是三阴经的开端。当三阳经的病邪传遍之后，传入阴经，因此毒邪侵入胸膈部位。其症状表现为咽喉干燥、胸膈胀满，此时可以采用催吐法使病情痊愈。
治疗热病第四天出现的结胸（邪热与痰水互结于胸脘）、胀满疼痛、高热、身体疼痛的症状，适宜服用苦参散以引发呕吐。
药材：苦参（半两，切碎）、恒山（半两）。
将上述药材捣碎并过筛制成散剂。取两中盏水，煎煮至一盏，滤去药渣。不限时间，一次性服完。服药后若出现呕吐则病愈；若未呕吐，可再次服用。
治疗热病第四天出现的咽喉干燥且腹部胀满的症状，适宜服用瓜蒂散以引发呕吐。
药材：瓜蒂（一分）、赤小豆（一两）。
将上述药材捣碎并粗筛制成散剂。每次服用二钱，取一中盏水，煎煮至五分，滤去药渣。不限时间，温服。以出现呕吐为度。
治疗热病第四天出现的高热、四肢沉重、食欲不振的症状，适宜服用柴胡散。
药材：柴胡（一两，去苗）、葛根（一两，切碎）、川大黄（一两，切碎微炒）、石膏（一两）、赤芍药（三分）、黄芩（微红，切碎）、鳖甲（适量，处理）。
将上述药材捣碎并粗筛制成散剂。每次服用五钱，取一大盏水，煎煮至五分，滤去药渣。不限时间，温服。
治疗热病第四天因毒邪内攻导致身体疼痛、高热头重、烦躁口渴不止的症状，适宜服用麻黄散。
药材：麻黄（一两，去根节）、桂心（半两）、川大黄（三分，切碎微炒）、茵陈（一两）、细辛（半两）、柴胡（半两，去苗）、甘草（半两，炙至微红切碎）、栝蒌根（一两）。
将上述药材捣碎并粗筛制成散剂。每次服用五钱，取一大盏水，煎煮至五分，滤去药渣。不限时间，温服。
治疗热病第四天发汗后病未愈，身体高热、心胸烦闷、无法入睡的症状，适宜服用葛根散。
药材：葛根（二两，切碎）、龙胆（半两，去芦头）、大青（半两）、桂心（半两）、甘草（半两，炙至微红切碎）、麻黄（适量）、升麻（一两）。
将上述药材全部捣碎并粗筛制成散剂。每次服用四钱，取一大盏水，煎煮至五分，滤去药渣。不限时间，温服。
治疗热病第四天出现头痛、胸满、进食即呕吐逆的症状，适宜服用竹茹散。
药材：竹茹（一两）、陈橘皮（一两，汤浸去白瓤焙干）、葛根（一两，切碎）、人参（一两，去芦头）、芦根（一两，切碎）、枇杷叶（半两，拭去毛炙至微黄）。
将上述药材捣碎并粗筛制成散剂。每次服用五钱，取一大盏水，加入粳米一百粒、生姜半分，煎煮至五分，滤去药渣。不限时间，温服。
治疗热病第四天热毒解除后，寒热往来、恶寒微热、不能进食的症状，适宜服用人参散。
药材：人参（一两，去芦头）、知母（一两）、枳实（一两，麸炒至微黄）、陈橘皮（一两，汤浸去白瓤）、栀子仁（一两）、槟榔（一两）、豉（三两，微炒至变色）、甘草（一两，炙至微红切碎）。
将上述药材捣碎并粗筛制成散剂。每次服用五钱，取一大盏水，煎煮至五分，滤去药渣。不限时间，温服。
On the fourth day of febrile disease, the Taiyin meridian is affected. The Taiyin meridian is the head of the three Yin meridians. After the pathogenic factors in the three Yang meridians have been exhausted, they transmit into the Yin meridians; thus, toxic factors invade the chest and diaphragm. The symptoms include dryness of the throat and fullness in the chest and diaphragm. In such cases, emesis (inducing vomiting) can be employed to achieve a cure.
For febrile disease on the fourth day presenting with Jie Xiong (chest binding characterized by fullness and pain due to the accumulation of heat and phlegm-fluid), fullness, severe pain, high fever, and body ache, it is appropriate to administer Kushen San (Bitterroot Powder) to induce emesis.
Ingredients: Kushen (Radix Sophorae Flavescentis, 0.5 liang, sliced); Hengshan (Radix Dichroae, 0.5 liang).
Pulverize the above ingredients and sieve them to make a powder. Boil two medium bowls of water until reduced to one bowl. Strain the dregs. Drink the entire amount at any time. If emesis occurs, the patient will recover; if no emesis occurs, administer again.
For febrile disease on the fourth day presenting with dryness of the throat and abdominal fullness, it is appropriate to administer Gouti San (Melon Seed Powder) to induce emesis.
Ingredients: Gouti (Fructus Momordicae, 1 fen); Chixiaodou (Semen Phaseoli Rubri, 1 liang).
Pulverize the above ingredients coarsely and sieve them to make a powder. For each dose, take 2 qian. Boil one medium bowl of water until reduced to 0.5 bowl. Strain the dregs. Take warm at any time. Use the induction of emesis as the limit.
For febrile disease on the fourth day presenting with high fever, heaviness of the four limbs, and inability to eat, it is appropriate to administer Chaihu San (Bupleurum Powder).
Ingredients: Chaihu (Radix Bupleuri, 1 liang, remove seedlings); Gegen (Radix Puerariae, 1 liang, sliced); Chuandahuang (Radix et Rhizoma Rhei, 1 liang, sliced and lightly stir-fried); Shigao (Gypsum Fibrosum, 1 liang); ChiShaoyao (Radix Paeoniae Rubra, 3 fen); Huangqin (Radix Scutellariae, slightly red, sliced); Biejia (Carapax et Plastrum Testudinis, appropriate amount, processed).
Pulverize the above ingredients coarsely and sieve them to make a powder. For each dose, take 5 qian. Boil one large bowl of water until reduced to 0.5 bowl. Strain the dregs. Take warm at any time.
For febrile disease on the fourth day where toxic factors attack internally, causing body pain, high fever with heavy head, restlessness, and unceasing thirst, it is appropriate to administer Mahuang San (Ephedra Powder).
Ingredients: Mahuang (Herba Ephedrae, 1 liang, remove root nodes); Guixin (Cortex Cinnamomi, 0.5 liang); Chuandahuang (Radix et Rhizoma Rhei, 3 fen, sliced and lightly stir-fried); Yichen (Herba Artemisiae Scopariae, 1 liang); Xixin (Radix Asari, 0.5 liang); Chaihu (Radix Bupleuri, 0.5 liang, remove seedlings); Gancao (Radix Glycyrrhizae, 0.5 liang, honey-fried until slightly red and sliced); Gualougen (Radix Trichosanthis, 1 liang).
Pulverize the above ingredients coarsely and sieve them to make a powder. For each dose, take 5 qian. Boil one large bowl of water until reduced to 0.5 bowl. Strain the dregs. Take warm at any time.
For febrile disease on the fourth day where sweating has not alleviated the condition, resulting in high fever, mental restlessness and oppression in the heart and diaphragm, and inability to sleep, it is appropriate to administer Gegen San (Kudzu Root Powder).
Ingredients: Gegen (Radix Puerariae, 2 liang, sliced); Longdan (Radix Gentianae, 0.5 liang, remove rhizome); Daqing (Folium Isatidis, 0.5 liang); Guixin (Cortex Cinnamomi, 0.5 liang); Gancao (Radix Glycyrrhizae, 0.5 liang, honey-fried until slightly red and sliced); Mahuang (Herba Ephedrae, appropriate amount); Shengma (Rhizoma Cimicifugae, 1 liang).
Pulverize all the above ingredients coarsely and sieve them to make a powder. For each dose, take 4 qian. Boil one large bowl of water until reduced to 0.5 bowl. Strain the dregs. Take warm at any time.
For febrile disease on the fourth day presenting with headache, chest fullness, and vomiting immediately after eating, it is appropriate to administer Zhuru San (Bamboo Shavings Powder).
Ingredients: Zhuru (Caulis Bambusae in Taenia, 1 liang); Chenju pi (Pericarpium Citri Reticulatae, 1 liang, soaked in hot water, white pith removed, dried); Gegen (Radix Puerariae, 1 liang, sliced); Renshen (Radix Ginseng, 1 liang, remove rhizome); Lugeng (Rhizoma Phragmitis, 1 liang, sliced); Pipaye (Folium Eriobotryae, 0.5 liang, hairs wiped off, stir-fried until slightly yellow).
Pulverize the above ingredients coarsely and sieve them to make a powder. For each dose, take 5 qian. Add 100 grains of Jingmi (Semen Oryzae Glutinosae) and 0.5 fen of Shengjiang (Rhizoma Zingiberis Recens) to one large bowl of water. Boil until reduced to 0.5 bowl. Strain the dregs. Take warm at any time.
After the resolution of heat-toxin in febrile disease on the fourth day, presenting with alternating chills and low-grade fever, aversion to cold with slight fever, and inability to eat, it is appropriate to administer Renshen San (Ginseng Powder).
Ingredients: Renshen (Radix Ginseng, 1 liang, remove rhizome); Zhimu (Rhizoma Anemarrhenae, 1 liang); Zhishi (Fructus Aurantii Immaturus, 1 liang, stir-bran-fried until slightly yellow); Chenju pi (Pericarpium Citri Reticulatae, 1 liang, soaked in hot water, white pith removed); Zhizi Ren (Semen Gardeniae, 1 liang); Binglang (Semen Arecae, 1 liang); Chi (Folium Sojae Preparatum, 3 liang, lightly stir-fried until color changes); Gancao (Radix Glycyrrhizae, 1 liang, honey-fried until slightly red and sliced).
Pulverize the above ingredients coarsely and sieve them to make a powder. For each dose, take 5 qian. Boil one large bowl of water until reduced to 0.5 bowl. Strain the dregs. Take warm at any time.