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This prescription has an extremely clear and light nature and flavor, and is adept at entering the Heart and Liver viscera. It moves stagnant Qi, resolves depression and accumulation, opens the orifices to clarify the mind, nourishes righteousness (healthy Qi) and eliminates pathogenic factors, possessing remarkable efficacy.

Shengdi Huang (Rehmanniae Radix), Maidong (Ophiopogonis Radix), Baishao (Paeoniae Radix Alba), Shichangpu (Acori Tatarinowii Rhizoma), Shihu (Dendrobii Caulis), Danpi (Moutan Cortex), Fushen (Poria with Hostwood) (each 2 qian), Chenpi (Citri Reticulatae Pericarpium) (1 qian), Mutong (Akebiae Caulis), Zhimu (Anemarrhenae Rhizoma) (1.5 qian).
If phlegm is excessive with depression, add Beimu (Fritillariae Bulbus) 2 qian. If phlegm is abundant accompanied by fire, add Dansheng (Arisaematis Cum Bile) 1.5 qian. If Yangming Fire is excessive with internal heat and manic shouting, add Shigao (Gypsum Fibrosum). Add Renshen (Ginseng Radix et Rhizoma).

(Li Dongyuan) Treats "Big Head Epidemic" (Epidemic Swollen Head Disease). Initially, there is aversion to cold and heaviness of the body, followed by severe swelling of the head and face, inability to open the mouth, upper dyspnea, throat dysfunction, thirst, and dry tongue. (Common saying: Big Head Epidemic is contagious; relatives do not visit each other, and those infected often cannot be saved. During the Taihe era of the Jin Dynasty, many people suffered from this disease. Physicians used bitter-cold purgatives such as Dahuang (Rhei Radix et Rhizoma) and Huanglian (Coptidis Rhizoma) to purge, resulting in slight relief, but symptoms returned the next day. After repeated purging, although symptoms eased slightly, the disease could not be cured, gradually progressing to a critical state. Li Dongyuan examined the patient and said: The upper part of the body is governed by Heaven's Qi; the lower half of the body is governed by Earth's Qi. This pathogenic heat lodges between the Heart and Lung, attacking upwards to cause severe swelling of the head and face. Using Chengqi Decoction-type formulas to purge excess heat from the Stomach constitutes punishing what is innocent. The reason the disease reached this state is due to inappropriate treatment. Thus, this prescription was created, saving many lives, and it was named Puji Xiaodu Yinzi.)

Huangqin (Scutellariae Radix, stir-fried with wine), Huanglian (Coptidis Rhizoma, stir-fried with wine, each 5 qian), Chenpi (Citri Reticulatae Pericarpium, white membrane removed), Sheng Gancao (Glycyrrhizae Radix et Rhizoma), Yuanshen (Scrophulariae Radix), Chaihu (Bupleuri Radix), Jiegeng (Platycodonis Radix) (each 2 qian), Lianqiao (Forsythiae Fructus), Banlangen (Isatidis Radix), Mabo (Calamostachys Spica), Niubangzi (Arctii Fructus), Bohe (Menthae Haplocalycis Herba) (a small amount). Administration: Decoct in water for oral administration, or mix with honey to form pills.
Huangqin and Huanglian are bitter and cold, clearing Heat from the Heart and Lung, serving as Sovereign drugs. Yuanshen is bitter and cold, Ju Hong (Chenpi) is bitter and acrid/pungent, Gancao is sweet and cold, clearing Fire and tonifying Qi, serving as Minister drugs. Lianqiao, Bohe, and Niubangzi... Yangming... in the book...

Treats hematochezia caused by Blood Heat. It can be used regardless of whether the syndrome involves the Spleen, Stomach, Large Intestine, Small Intestine, or Bladder.
Shengdi Huang (Rehmanniae Radix), Shaoyao (Paeoniae Radix), Xuduan (Dianthi Herba), Diyü (Sanguisorbae Radix), Huangqin (Scutellariae Radix), Huaihua (Sophorae Flos), Jingjie Sui (Schizonepetae Spica, stir-fried until charred), Wumei (Mume Fructus) (one fruit). If Fire is excessive, add Zhizi (Gardeniae Fructus) and Huangbai (Phellodendri Cortex).