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Discourse states: Whenever dysentery presents with pus and blood mixed with black stasis in flakes, resembling chicken or duck liver, discharged together with blood, it is termed "Gu Li" (Gu Dysentery). This arises from the disharmony of cold and heat in the seasons, where damp-toxic qi invades the human meridians, gradually reaching the zang-fu organs. The toxic qi, carrying heat, contends with the blood, lodging in the intestines, presenting a condition similar to being possessed by a parasite disease. Hence, it is named Gu Dysentery.

For treating Gu Dysentery with bloody discharge resembling chicken or duck liver flakes, accompanied by abdominal pain and mental restlessness, use Diyu Tang (Sanguisorba Decoction):
Diyu (Radix Sanguisorbae, chopped), Xijiao (Cornu Rhinocerotis, shaved), Huanglian (Rhizoma Coptidis, removing mustache, slightly stir-fried), Baiye (Cacumen Platycladi, slightly stir-fried), Huangbai (Cortex Phellodendri, removing rough bark, processed and chopped), Danggui (Radix Angelicae Sinensis, chopped and slightly stir-fried), Huangqin (Radix Scutellariae, removing black parts).
The above nine ingredients are coarsely crushed and sifted. Each dose consists of three qianbi (approx. 3-5g), boiled in one sheng (approx. 200ml) of water until reduced to seven-tenths. Strain and take warm, at any time.

For treating Gu Dysentery with bloody discharge like chicken liver and pain, use Jiegeng San (Platycodon Powder):
Jiegeng (Radix Platycodi, removing rhizome head, chopped and stir-fried), Xijiao (Cornu Rhinocerotis, shaved, equal parts).
The above two ingredients are crushed and sieved into a powder. Take one qianbi with wine, three times daily. For those unable to swallow voluntarily, administer via enema/gavage; upon entering the heart region, there may be temporary restlessness, which will subside spontaneously after a moment. Discontinue after seven days. Pig spleen can be consumed for nourishment.

For treating Intestinal Gu, initially passing red stool followed by yellow-white foam, persisting for years without cure:
Niuxi (Radix Achyranthis Bidentatae, one liang).
The single ingredient is chopped and crushed, soaked overnight in one sheng of pure wine. Take on an empty stomach at dawn. A second dose leads to recovery.

For treating seasonal Gu Toxicity causing dysentery, use Huanglian San (Coptis Powder):
Huanglian (Rhizoma Coptidis, removing mustache, one liang), Baifan (Alumen, roasted until juice is exhausted), Ganjiang (Rhizoma Zingiberis Recens, processed), Fuzi (Radix Aconiti Lateralis Preparata, processed until cracked, skin and umbilicus removed, each three fen).
The above four ingredients are crushed and sieved into a fine powder. Take one and a half qianbi, mixed with warm wine, taken on an empty stomach in the morning and at noon.

For treating Gu Dysentery with bloody discharge like chicken liver and unbearable abdominal pain, use Qiangen Yin (Qian Gen Decoction):
Qiangen (Radix Rubiae Cordifoliae), Shengma (Rhizoma Cimicifugae), Xijiao (Cornu Rhinocerotis, shaved), Jiegeng (Radix Platycodi, removing rhizome head, chopped and stir-fried), Huangqin (Radix Scutellariae, removing black heart), Huangbai (Cortex Phellodendri, removing rough bark, each three fen), Diyu (Radix Sanguisorbae), Bai [Text missing].
The above eight ingredients are crushed into a coarse powder. Take five qianbi per dose, boiled in one and a half sheng of water until reduced to seven-tenths. Strain and take on an empty stomach in the morning and at noon.

For treating injury to zang-fu organs, weakness of intestines and stomach, blood seeping into the intestines, wind-cold taking advantage of the deficiency, resulting in bloody stools with black stasis flakes, or swelling and pain of the five hemorrhoids, with long-term pus and blood discharge, use Pi Wan (Pi Pills):
Pi [Text missing, likely referring to a specific animal part or herb, e.g., Renshen or similar contextually] (one piece, chopped and roasted until black), Danggui (Radix Angelicae Sinensis, chopped and baked), Xuduan (Radix Dipsaci), Huang [Text missing], Lianqiao (Fructus Forsythiae), Huaishi (Fructus Sophorae, stir-fried), Ganjiang (Rhizoma Zingiberis Recens, processed), Fuzi (Radix Aconiti Lateralis Preparata, processed until cracked, skin and umbilicus removed).
The above ten ingredients are crushed and sieved into powder. Mix with refined honey to form pills the size of paulownia seeds. Take fifty pills per dose, with rice drink before meals on an empty stomach.

For treating seasonal Gu Dysentery, use Huangbai Wan (Phellodendron Pills):
Huangbai (Cortex Phellodendri, removing rough bark), Huanglian (Rhizoma Coptidis, removing mustache, each one liang).
Crush the above two ingredients into powder. Mix with rice drink to form pills the size of paulownia seeds. Take thirty pills per dose, with rice drink on an empty stomach in the morning, and again at noon.

For treating Gu Toxic Dysentery with discharge resembling goose or duck liver and unbearable abdominal pain, use Huangqin Tang (Scutellaria Decoction):
Huangqin (Radix Scutellariae, removing black heart), Huanglian (Rhizoma Coptidis, removing mustache, stir-fried, each half liang).
Finely chop the above two ingredients. Boil in two sheng of water until reduced to one sheng. Strain and take hot on an empty stomach in the morning and evening. Cold administration causes coagulation.

For treating Gu Toxic Dysentery with bloody flakes and stabbing pain below the umbilicus, use Shengma Tang (Cimicifuga Decoction):
Shengma (Rhizoma Cimicifugae), Diyu (Radix Sanguisorbae), Qiangen (Radix Rubiae Cordifoliae), Huangqin (Radix Scutellariae, removing black heart, each one and a half liang), Xijiao (Cornu Rhinocerotis, shaved, one liang), Shanzhizi (Fructus Gardeniae, fourteen pieces, shell removed).
Coarsely crush and sift the above six ingredients. Take five qianbi per dose. Add one fen of fresh Shengdihuang (Radix Rehmanniae Fresh, chopped), three stalks of Xiebai (Bulbus Allii Macrostemonis, chopped), and twenty-seven grains of Chi (Fermented Soybean, prepared as Douchi). Boil together in one and a half sheng of water until reduced to eight-tenths. Strain and take warm on an empty stomach in the morning. Take again in the evening.

For treating dysentery caused by Gu invasion, with dozens of bowel movements daily:
Badou (Semen Crotonis, fourteen pieces, skin, heart, and membrane removed, oil expressed), Lilv (Radix Veratri Nipponici, removing rhizome head), Yanqing (Lytta, wings and feet removed, stir-fried), Fuzi (Radix Aconiti Lateralis Preparata, processed until cracked, skin and umbilicus removed), Baifan (Alumen, roasted until dry/crisp).
Crush the above five ingredients into powder and mix evenly. Wrap a quantity the size of a large soybean in cotton and insert into the lower orifice (anus), three times daily.