It is stated in the discussion: The *Neijing* (Inner Canon) records that there is a disease characterized by a sweet taste in the mouth, which is caused by the overflow of the five qi, and is named Pi Dan (Spleen Prolapse/Heat). Food enters the Yin (internal organs), and generates Qi in the Yang (exterior/functional aspects). Excessive consumption of rich and sweet foods leads to internal heat and abdominal fullness, thereby causing an excess of Yang Qi. Therefore, pure Yang heat excess constitutes the Dan condition; its manifestation is a sweet taste in the mouth. If left untreated for a long time, it transforms into Xiao Ke (Wasting-Thirst Syndrome), due to the upward overflow of hot qi.

Lancao Tang (Orchid Herb Decoction) for treating Pi Dan with sweet taste in the mouth and abdominal fullness:
Lancao (Herba Coelomidis, 1 liang, cut)
Take the above single herb, add three zhen of water, decoct until one and a half zhen remains, remove the dregs, and divide into three warm doses. Take at any time.

Chishao Yao Tang (Red Peony Root Decoction) for treating Pi Dan with internal heat of the Zang organs, dry and cracked lips, foul breath, and incessant thirst:
Chishao Yao (Radix Paeoniae Rubrae), Sheng Gan Di Huang (Radix Rehmanniae Preparata, dried over fire, each 1 liang), Dahuang (Radix et Rhizoma Rhei, crushed and stir-fried), Gancao (Radix Glycyrrhizae Preparata, honey-fried, each 0.5 liang)
Crush and sieve the above four herbs coarsely. For each dose, take two qianbi, add one zhen of water, decoct until seven-tenths remain, remove the dregs, and take warm after meals.

Gegen Tang (Kudzu Root Decoction) for treating Pi Dan with yellow complexion, sweet taste in the mouth, and incessant vexation and thirst:
Gegen (Radix Puerariae, crushed, 2.5 liang), Mahuang (Herba Ephedrae, roots and joints removed, 1 liang), Guizhi (Ramulus Cinnamomi, bark removed, 3 fen), Shigao (Gypsum Fibrosum, crushed, 3 liang), Shaoyao (Radix Paeoniae Albae, 1.1 liang), Gancao (Radix Glycyrrhizae Preparata, honey-fried, 1 liang)
Crush and sieve the above six herbs coarsely. For each dose, take three qianbi, add one zhen of water, decoct until seven-tenths remain, remove the dregs, and take warm at any time.

Zhuye Tang (Bamboo Leaf Decoction) for treating Pi Dan with mental restlessness and vexation, sweet taste in the mouth, dry throat, and intense thirst:
Dan Zhuye (Folium Bambusae, cut, 1 liang), Chaihu (Radix Bupleuri, sprouts removed, 2 liang), Xijiao (Cornu Rhinocerotis, shaved into flakes), Shaoyao (Radix Paeoniae Albae, each 1.5 liang), Huangqin (Radix Scutellariae, black heart removed), Dahuang (Radix et Rhizoma Rhei, crushed and stir-fried)
Crush and sieve the above seven herbs coarsely. For each dose, take five qianbi, add one and a half zhen of water, decoct until one zhen remains, remove the dregs, add Ban Qianbi of Xiaoming Nao (Natrii Sulfas), and take warm.

Maimendong Tang (Ophiopogon Root Decoction) for treating Pi Dan resulting in jaundice, dry mouth, and intense thirst:
Maimendong (Rhizoma Ophiopogonis, heart removed, used raw, 3 liang), Shaoyao (Radix Paeoniae Albae), Huangqin (Radix Scutellariae, black heart removed, each 1.5 liang), Zhizi Ren (Semen Gardeniae, 5 seeds), Shigao (Gypsum Fibrosum, crushed, 3 liang), Xijiao (Cornu Rhinocerotis, shaved into flakes, 1 liang)
Crush and sieve the above six herbs coarsely. For each dose, take five qianbi, add one and a half zhen of water, decoct until one zhen remains, remove the dregs, add Ban Qianbi of Xiaoming Nao (Natrii Sulfas), and take warm after meals.

Zhimu Tang (Anemarrhenae Root Decoction) for treating Pi Dan with fever, sweet taste in the mouth, dry throat, and intense thirst:
Zhimu (Rhizoma Anemarrhenae, 1.5 liang), Shigao (Gypsum Fibrosum, crushed, 3 liang), Shengma (Rhizoma Cimicifugae, crushed), Gancao (Radix Glycyrrhizae Preparata, honey-fried and crushed, each 1 liang), Zhuye (Folium Bambusae, one handful), Bai Jingshi (Semen Oryzae Glutinis Albus, one he), Pipaye (Folium Eriobotryae, hairs wiped off, 3 fen)
Crush and sieve the above seven herbs coarsely. For each dose, take five qianbi, add one and a half zhen of water, decoct until one zhen remains, remove the dregs, and take warm.

Qianhu Tang (Peucedani Root Decoction) for treating Pi Dan with sweet taste in the mouth and incessant vexation and thirst:
Qianhu (Radix Peucedani, rhizome removed, 1.5 liang), Chi Fuling (Poria cum Risu, black skin removed, 2 liang), Guizhi (Ramulus Cinnamomi, bark removed, 3 fen), Xijiao (Cornu Rhinocerotis, shaved into flakes, 1 liang), Binglang (Semen Arecae, 3 pieces, crushed)
Crush and sieve the above seven herbs coarsely. For each dose, take five qianbi, add one and a half zhen of water, decoct until one zhen remains, remove the dregs, and take warm.

Fuling Tang (Poria Decoction) for treating Pi Dan with sweet taste in the mouth, dry throat, and intense thirst:
Chi Fuling (Poria cum Risu, black skin removed), Houpo (Cortex Magnoliae Officinalis, bark removed, stir-fried with ginger juice and crushed, each 4 liang), Gancao (Radix Glycyrrhizae Preparata, honey-fried and crushed), Renshen (Radix Ginseng), Huangqin (Radix Scutellariae, black heart removed, each 2 liang), Guizhi (Ramulus Cinnamomi, bark removed, 5 liang), Banxia (Rhizoma Pinelliae, washed seven times in boiling water, 5 liang)
Crush and sieve the above seven herbs coarsely. For each dose, take five qianbi, add three slices of fresh ginger, add one and a half zhen of water, decoct until one zhen remains, remove the dregs, and take warm at any time.

Sanhe Yinzi (Three-Harmony Infusion) for treating Pi Dan with vexation and thirst:
Shengjiang (Rhizoma Zingiberis Recens, half liang, crushed to extract juice), Nuomi (Semen Oryzae Glutinis, half he, washed and ground), Fengmi (Mel, one he)
Mix the above three ingredients and divide into five doses. For each dose, mix with one zhen of fresh water and take orally at any time.

Lingyangjiao Wan (Antelope Horn Pill) for treating Pi Dan with sweet taste in the mouth, internal heat, and abdominal fullness:
Lingyangjiao (Cornu Saigae Tataricae, shaved into flakes), Zhike (Fructus Aurantii, pulp removed, stir-fried with bran), Dahuang (Radix et Rhizoma Rhei, crushed and stir-fried), Mutong (Caulis Akebiae, crushed), Dama Zi Ren (Semen Cannabis, crushed), Binglang (Semen Arecae, crushed), Sangbaipi (Cortex Morus Radicis, crushed, each [text missing])
Grind the above nine herbs into fine powder. Use refined honey to make pills the size of Sophora japonica seeds. For each dose, take twenty pills, and swallow with warm water at any time.

Maimendong Jian (Ophiopogon Electuary) for treating Pi Dan with internal heat, vexation, and thirst:
Sheng Maimendong (Rhizoma Ophiopogonis, juice), Sheng Dihuang (Radix Rehmanniae, juice, each half jin), Fengmi (Mel, half sheng), Gualougen (Radix Trichosanthis, 2 liang), Digupi (Cortex Lycii, chopped), Huangqi (Radix Astragali, chopped), Weirui (Rhizoma Polygonati Odorati), Zhimu (Rhizoma Anemarrhenae), Dan Zhuye (Folium Bambusae, cut), Xijiao (Cornu Rhinocerotis, shaved into flakes), Shengma (Rhizoma Cimicifugae, each 1 liang), Gancao (Radix Glycyrrhizae Preparata, honey-fried, half liang), Shigao (Gypsum Fibrosum, crushed and ground), Ningshuishi (Natron, crushed and ground, each 2 liang)
Take the above fourteen herbs. Except for the first three (juices and honey), crush and sieve the remaining herbs coarsely. Add seven sheng of water, decoct until three sheng remain, filter out the dregs. Then add the first three ingredients, and simmer slowly over low heat until it resembles thin malt syrup. Store in a porcelain container. For each dose, take one spoonful, dissolve in warm water, and take orally at any time.