夫伤寒八日病不解者。或者诸阴阳经络。重受于病。或因发汗吐下之后。毒瓦斯不尽。所
以病证犹在也。
治伤寒八日。热势深重。大便结涩。心腹痞满。食饮不下。精神恍惚。谵言妄语
。宜服
鳖甲（一两涂醋炙令微黄去裙 ） 细辛（一两） 吴茱萸（三分汤浸七遍焙干微炒） 白
藓
皮
黄
〔一（半）
上件药。捣筛为散。每服三钱。以水一中盏。入生姜半分。煎至六分。去滓。不计时候
温服。微利为度。
治伤寒八日。烦热不退。四肢疼痛。宜服犀角散方。
犀角屑（一两） 川升麻（一两半） 柴胡（一两半去苗） 葛根（一两半锉） 吴蓝
（一两）
甘草（一两炙微赤锉）
上件药。捣筛为散。每服四钱。以水一中盏。煎至六分。去滓。次入马牙硝二钱。更煎
三二沸。不计时候温服。
又方。
柴胡（一两去苗） 黄芩（一两） 犀角屑（三分） 茯神（三分） 人参（一两去芦
头） 甘草
（半两炙微赤锉）
上件药。捣筛为散。每服五钱。以水一大盏。煎至七分。去滓。下朴硝二钱。再煎三二
沸。不计时候。分温二服。
治伤寒八日不解。默默烦闷。腹中干燥。大肠结涩。狂言。宜服柴胡散方。
柴胡（一两去苗） 赤芍药（半两） 知母（半两） 人参（一两去芦头） 川大黄（一
两锉碎
微炒） 甘草（半两炙微赤锉） 半夏（半两汤浸七遍去滑） 葳蕤（半两） 黄芩（半两）
上件药。捣筛为散。每服五钱。以水一大盏。入生姜半分。煎至五分。去滓。不计时候
温服。以微利为度。
治伤寒八日。风湿相搏。身痛心烦。不能自转侧。不呕不渴。下之脉浮者。宜服
附子汤
附子（一两炮裂去皮脐） 桂心（一两） 白术（一两） 白芷（一两） 甘草（一两
炙微赤锉）
葛根（一两） 人参（一两去芦头） 陈橘皮（一两汤浸去白瓤焙）
上件药。细锉和匀。每服半两。以水一大盏。入生姜半分。枣三枚。煎至七分。去滓。
不计时候。分温二服。
如果伤寒病到了第八天还没有痊愈，可能是因为阴阳各条经络再次受到病邪侵袭，或者是因为在发汗、催吐、泻下等治疗之后，体内的毒热之气没有完全清除，所以病症依然存在。
治疗伤寒八日，热势深重，大便干结涩滞，心腹部痞塞胀满，饮食无法咽下，精神恍惚，胡言乱语。适宜服用鳖甲散方。
药材包括：鳖甲（一两，涂醋炙至微黄，去除裙边）、细辛（一两）、吴茱萸（三分，用水浸泡七遍后焙干并微炒）、白鲜皮（一两）。
以上药材，捣碎过筛制成散剂。每次服用三钱，用水一中盏，加入生姜半分，煎煮至六分，滤去药渣。不分时候温服，以轻微腹泻为度。
治疗伤寒八日，烦热不退，四肢疼痛。适宜服用犀角散方。
药材包括：犀角屑（一两）、川升麻（一两半）、柴胡（一两半，去苗）、葛根（一两半，锉碎）、吴蓝（一两）、甘草（一两，炙至微红并锉碎）。
以上药材，捣碎过筛制成散剂。每次服用四钱，用水一中盏，煎煮至六分，滤去药渣。随后加入马牙硝二钱，再煎煮两三沸。不分时候温服。
又一方。
药材包括：柴胡（一两，去苗）、黄芩（一两）、犀角屑（三分）、茯神（三分）、人参（一两，去芦头）、甘草（半两，炙至微红并锉碎）。
以上药材，捣碎过筛制成散剂。每次服用五钱，用水一大盏，煎煮至七分，滤去药渣。加入朴硝二钱，再煎煮两三沸。不分时候，分两次温服。
治疗伤寒八日未解，沉默寡言且心中烦闷，腹中干燥，大肠干结涩滞，说狂话。适宜服用柴胡散方。
药材包括：柴胡（一两，去苗）、赤芍药（半两）、知母（半两）、人参（一两，去芦头）、川大黄（一两，锉碎并微炒）、甘草（半两，炙至微红并锉碎）、半夏（半两，用水浸泡七遍去滑腻）、葳蕤（半两）、黄芩（半两）。
以上药材，捣碎过筛制成散剂。每次服用五钱，用水一大盏，加入生姜半分，煎煮至五分，滤去药渣。不分时候温服，以轻微腹泻为度。
治疗伤寒八日，风湿相互搏结，身体疼痛且心烦，不能自行翻身转侧，不呕吐也不口渴，若误用泻下法导致脉象浮者。适宜服用附子汤。
药材包括：附子（一两，炮裂去皮和脐）、桂心（一两）、白术（一两）、白芷（一两）、甘草（一两，炙至微红并锉碎）、葛根（一两）、人参（一两，去芦头）、陈橘皮（一两，用水浸泡去白瓤后焙干）。
以上药材，细细锉碎混合均匀。每次服用半两，用水一大盏，加入生姜半分、大枣三枚，煎煮至七分，滤去药渣。不分时候，分两次温服。
If the disease of cold damage (Shanghan) has not resolved by the eighth day, it may be due to the re-invasion of pathogens into the various Yin and Yang meridians, or because the toxic heat (Du Wa) was not completely cleared after sweating, emesis, or purgation therapies. Therefore, the symptoms persist.
For cold damage on the eighth day, with severe fever, dry and difficult defecation, epigastric and abdominal fullness and stagnation, inability to ingest food and drink, mental confusion, and delirious speech, the Biejia Powder is indicated.
Ingredients: Bie Jia (Testudinis Carapax et Plastrum, 1 liang, coated with vinegar and roasted until slightly yellow, remove the skirt); Xixin (Asari Radix et Rhizoma, 1 liang); Wuzhuyu (Evodiae Fructus, 3 qian, soaked in water seven times, dried, and lightly roasted); Baixianpi (Dictamni Cortex, 1 liang).
Process the above ingredients by crushing and sieving into a powder. Take 3 qian per dose. Add one zhong zhan of water and half a fen of fresh ginger. Decoct until reduced to six parts. Strain and take warm at any time. The effect is considered adequate if mild diarrhea occurs.
For cold damage on the eighth day, with persistent irritability and heat, and pain in the four limbs, the Xijiao Powder is indicated.
Ingredients: Xijiao (Rhinocerotis Cornu, 1 liang); Chuan Shengma (Cimicifugae Rhizoma, 1.5 liang); Chaihu (Bupleuri Radix, 1.5 liang, remove the radix tip); Gegen (Puerariae Radix, 1.5 liang, cut into small pieces); Wu Lan (Isatidis Folium, 1 liang); Gancao (Glycyrrhizae Radix et Rhizoma, 1 liang, roasted until slightly red and cut into small pieces).
Process the above ingredients by crushing and sieving into a powder. Take 4 qian per dose. Add one zhong zhan of water. Decoct until reduced to six parts. Strain. Then add Mayaxiao (Natrii Sulfas, 2 qian). Boil for two or three boils. Take warm at any time.
Another prescription.
Ingredients: Chaihu (Bupleuri Radix, 1 liang, remove the radix tip); Huangqin (Scutellariae Radix, 1 liang); Xijiao (Rhinocerotis Cornu, 3 qian); Fushen (Poria cum Radix Pinelli, 3 qian); Renshen (Ginseng Radix, 1 liang, remove the rhizome); Gancao (Glycyrrhizae Radix et Rhizoma, 0.5 liang, roasted until slightly red and cut into small pieces).
Process the above ingredients by crushing and sieving into a powder. Take 5 qian per dose. Add one da zhan of water. Decoct until reduced to seven parts. Strain. Add Puxiao (Natrii Sulfas, 2 qian). Boil for two or three boils. Take warm in two divided doses at any time.
For cold damage unresolved after eight days, characterized by silence and inner vexation, dryness in the abdomen, dry and difficult defecation in the large intestine, and manic speech, the Chaihu Powder is indicated.
Ingredients: Chaihu (Bupleuri Radix, 1 liang, remove the radix tip); Chi Shaoyao (Paeoniae Radix Rubra, 0.5 liang); Zhimu (Anemarrhenae Rhizoma, 0.5 liang); Renshen (Ginseng Radix, 1 liang, remove the rhizome); Chuan Dahuang (Rhei Radix et Rhizoma, 1 liang, cut into small pieces and lightly roasted); Gancao (Glycyrrhizae Radix et Rhizoma, 0.5 liang, roasted until slightly red and cut into small pieces); Banxia (Pinelliae Rhizoma, 0.5 liang, soaked in water seven times to remove slipperiness); Weirui (Polygonati Odorati Rhizoma, 0.5 liang); Huangqin (Scutellariae Radix, 0.5 liang).
Process the above ingredients by crushing and sieving into a powder. Take 5 qian per dose. Add one da zhan of water and half a fen of fresh ginger. Decoct until reduced to five parts. Strain and take warm at any time. The effect is considered adequate if mild diarrhea occurs.
For cold damage on the eighth day, where wind-dampness combats each other, causing body pain and vexation, inability to turn over independently, no vomiting, no thirst, and if the pulse becomes floating after erroneous purgation, the Fuzi Tang is indicated.
Ingredients: Fuzi (Aconiti Lateralis Radix Praeparata, 1 liang, roasted, peel removed, umbilicus removed); Guixin (Cinnamomi Ramulus, 1 liang); Baizhu (Atractylodis Macrocephalae Rhizoma, 1 liang); Baizhi (Angelicae Dahuricae Radix, 1 liang); Gancao (Glycyrrhizae Radix et Rhizoma, 1 liang, roasted until slightly red and cut into small pieces); Gegen (Puerariae Radix, 1 liang); Renshen (Ginseng Radix, 1 liang, remove the rhizome); Chenjupi (Citri Reticulatae Pericarpium, 1 liang, soaked in water, white pith removed, dried).
Cut the above ingredients finely and mix evenly. Take 0.5 liang per dose. Add one da zhan of water, half a fen of fresh ginger, and three dates. Decoct until reduced to seven parts. Strain. Take warm in two divided doses at any time.