Discourse states: When Taiyang disease (disease of the Taiyang channel) of Shanghan (Cold Damage) has passed for three days, and sweating, vomiting, purging, or warm needle therapies have already been applied, yet the condition remains unresolved, it often transforms into a Huai Bing (ruined disease). If the pathogen shifts to Shaoyang (Lesser Yang), or if after vomiting, purging, and sweating, the Shaoyang syndrome symptoms cease, this is termed Huai Bing. One must ascertain what error in treatment was committed and then apply therapy accordingly. These situations arise because the Shanghan pathogen resided in the various channels and collaterals; after sweating, vomiting, and purging, the pathological signs were not eliminated, and the patient was subsequently affected by external pathogenic factors (Ke Qi). Since these external factors vary in nature—cold, heat, dryness, dampness, or wind—the diseases also change accordingly, hence the term "Huai Bing." Furthermore, when Shanghan has progressed beyond its original meridian stage and is re-exposed to heat pathogens, which remain stagnant and accumulate within the Zang-Fu organs, leading to variable post-illness conditions; or when Shanghan has resolved but the patient remains emaciated with shortness of breath and residual symptoms persist—all these are referred to as Huai Bing.

To treat the aftermath of Shanghan Huai Bing, whether ten-plus days, half a month, or twenty days have passed, and the patient remains listless, mentally confused, speaking incoherently, without alternating chills and fever, physicians may mistakenly attribute it to demonic influence or wind disease, employing various ineffective treatments. Alternatively, the patient may exhibit tidal fever with flushed cheeks or symptoms resembling malaria. All these result from incomplete sweating, leaving residual toxins in the Pericardium Collateral (Xin Bao Luo).

Zhimu Mahuang Tang (Anemarrhena and Ephedra Decoction):
Zhimu (Anemarrhenae Rhizoma, roasted, 1.5 liang), Mahuang (Ephedrae Herba, roots and joints removed, boiled and scum skimmed off), Gancao (Licorice Root, honey-fried and chopped), Shaoyao (Paeoniae Radix), Huangqin (Scutellariae Radix, black heart removed, each 0.5 liang), Guizhi (Cinnamomi Ramulus, bark removed, 0.5 liang; reduce by half in midsummer).
The above six herbs are chopped like hemp seeds. Each dose consists of 5 qianbi, boiled in 1.5 sheng of water until reduced to 0.8 sheng. Strain and take warm. Three doses can be taken sequentially within half a day. Cover warmly to induce sweating. If no sweat occurs, administer again. If there is mental restlessness, insomnia, or thirst, provide small amounts of water gradually until the Stomach Qi harmonizes and recovery ensues.

Shengma Tang (Cimicifugae Decoction) for treating Shanghan Huai Bing that has persisted for several days without improvement, unresponsive to various medications:
Shengma (Cimicifugae Rhizoma), Biejia (Testudinis Carapax et Plastrum, vinegar-roasted, skirt removed), Zhike (Aurantii Fructus, pith removed, bran-fried), Xijiao (Rhinocerotis Cornu, shaved), Gegen (Puerariae Radix), Huangqin (Scutellariae Radix, black heart removed, each 3 fen), Gancao (Licorice Root, honey-fried and chopped), Qianhu (Peucedani Radix, radix head removed), Wutou (Aconiti Lateralis Radix Praeparata, cracked, skin and navel removed, each 0.5 liang).
The above nine herbs are chopped like hemp seeds. Each dose consists of 5 qianbi, boiled in 1.5 sheng of water until reduced to 0.8 sheng. Strain, add Dihuang juice (Rehmanniae Radix Juice, 2 he), mix well, and take warm after meals.

Mainu Wan (Wheat Parasite Pill) for treating Shanghan Huai Bing refractory to medical treatment, with heat in the chest causing inability to speak:
Mainu (Triticum Aestivum Parasitum), Fudi Mo (Soot from cooking pot bottom), Zaotu Mo (Soot from chimney flue), Liangshang Chen (Dust from roof beams), Dahuang (Rhei Radix et Rhizoma, chopped and fried), Huangqin (Scutellariae Radix, black heart removed), Puxiao (Natrii Sulfas, ground, each 0.5 liang), Mahuang (Ephedrae Herba, roots and joints removed, 1 liang).
The above eight herbs are pounded and ground into powder. Mix with refined honey and pound 300–500 times. Form pills the size of bullet shots. Take one pill per dose, dissolved in fresh cold water. If thirsty, drink as much water as possible; if not thirsty, force drinking. Soon, chills will occur, followed by sweating and recovery.

Moxiang Wan (Musk Pill) for Shanghan Huai Bing where cold and heat contend, resulting in epigastric knotting, chest fullness, shortness of breath, constipation, body discoloration (yellow, green, black like peach branches), cold limbs, and internal heat accumulation. Decoctions are contraindicated.
Moxiang (Moschus, ground), Zhuling (Polypori Umbellati Sclerotium, black skin removed), Puxiao (Natrii Sulfas, ground), Raohua (Genistae Despiciensis Radix, fried), Yuanhua (Genistae Monspessulani Flos, vinegar-fried, each 1 fen), Dahuang (Rhei Radix et Rhizoma, chopped and fried), Shangling (Phytolaccae Radix), Gansui (Kansui Radix, prepared, each 0.5 liang).
The above eight herbs are coarsely pounded and ground into powder. Mix with refined honey and pound 300–500 times. Form pills the size of mung beans. Take 10 pills per dose before meals with warm water. Diarrhea will likely occur after some time; if not, repeat the dose.

Heiniu Wan (Black Slave Pill) for Shanghan Huai Bing with pain in the head and bones/flesh, delirious speech, refractory to treatment:
Mahuang (Ephedrae Herba, roots and joints removed, 1.5 liang), Huangqin (Scutellariae Radix, black heart removed), Gancao (Licorice Root, honey-fried and chopped), Zaotu Mo (Soot from chimney flue), Mangxiao (Natrii Sulfas, each 1 liang), Chi (Fermented Soybean, 1 he, fried).
The above six herbs are pounded and sifted into powder. Mix with refined honey and pound 300–500 times. Form pills the size of bullets. Take one pill per dose, dissolved in fresh cold water, at any time.

Da Xiao Wan (Great Efficacy Pill) for Shanghan Huai Bing:
Wutou (Aconiti Radix), Fuzi (Aconiti Lateralis Radix Praeparata, each 1 liang; remove skin and navel, grind to powder, boil in 1 sheng of vinegar until dry, then add 1 sheng of good wine and boil into a paste, then add other herbs). Wushe (Bungarus Parvus, soaked in wine, skin and bones removed, roasted), Xixin (Asari Radix et Rhizoma, seedlings and leaves removed), Houpo (Magnoliae Officinalis Cortex, rough bark removed, ginger juice-roasted), Renshen (Ginseng Radix), Chifuling (Polypori Umbellati Sclerotium cum Rubro, black skin removed), Guizhi (Cinnamomi Ramulus, bark removed), Ganxie (Scorpio, fried), Muxiang (Aucklandiae Radix), Ruxiang (Olibanum, ground), Caodoukou (Cardamomi Fructus, skin removed), Sharen (Amomi Fructus Rotundus, ground), Hutonglei (Tamarisci Caulis Exsudatio), Binglang (Arecae Semen, chopped), Nifen (Calomel), Bu Hui Mu (Asbestus, each 1 fen).
Of the seventeen ingredients, fifteen are pounded and ground into powder. Mix with the two pastes and pound into pills the size of Sophora seeds. Take 10 pills per dose. For excess Yang patterns, dissolve with Ni Fen and Niu Huang (Calomel and Bovis Calculus) in water. For excess Yin patterns causing cold extremities and epigastric stagnation, take with Liu Zhi Tang (Willow Branch Decoction).

Maimendong Tang (Ophiopogonis Decoction) for Shanghan Huai Bing persisting long-term with unremitting tidal fever, heavy body, confusion, and irritability:
Maimendong (Ophiopogonis Radix, core removed, roasted), Chifuling (Polypori Umbellati Sclerotium cum Rubro, black skin removed, each 1 liang), Biejia (Testudinis Carapax et Plastrum, skirt removed, vinegar-roasted, 2 liang), Gancao (Licorice Root, honey-fried and chopped, 0.5 liang).
The above four herbs are coarsely pounded and sifted. Take 3 qianbi per dose with 1 sheng of water, one Wu Mei (Mume Fructus), and 50 Xiaomai (Tritici Semen). Boil until reduced to 0.7 sheng. Strain and take warm, at any time.

Qianhu Tang (Peucedani Decoction) for Shanghan Huai Bing with tidal fever, flushed cheeks, dry mouth, irritability, mental cloudiness, and long-term non-resolution:
Qianhu (Peucedani Radix, radix head removed, 2 liang), Chaihu (Bupleuri Radix, seedlings removed), Changshan ( Dichroae Radix), Renshen (Ginseng Radix), Gegen (Puerariae Radix, chopped, each 1 liang), Gancao (Licorice Root, honey-fried and chopped, 3 fen).
The above six herbs are coarsely pounded and sifted. Take 3 qianbi per dose with one large sheng of water, one crushed Wu Mei (Mume Fructus), and three slices of Shengjiang (Zingiberis Rhizoma Recens). Boil until reduced to 0.7 sheng. Strain and take warm, at any time.