Fei Er Wan
Star肥儿丸 (Fat Child Pill)
Source: Tai Ping Hui Min He Ji Ju Fang — Imperial Medical Department (Song, 1078)
Last updated October 1, 2026
Description
Fei Er Wan (Fat Child Pill), from the Tai Ping Hui Min He Ji Ju Fang (Imperial Grace Formulary of the Tai Ping Era) by Imperial Medical Department.
Actions: Kills parasites; Reduces accumulation; Strengthens the Spleen; Clears heat.
Presentation: Intestinal parasites and gan ji (infantile malnutrition): abdominal pain, poor digestion, sallow yellowish complexion, thin or emaciated, poor appetite, decreased intake, loose stools, enlarged swollen abdomen, weak constitution, low-grade fever, constant fatigue, possible nausea and vomiting, dry mouth and thirst, foul breath.
Composition: Pig bile (used as the pill binder) helps Huang Lian clear Liver and Stomach heat. Quantities are pill-batch amounts.
Cautions:
- Not for gan ji due to Spleen and Stomach deficiency, since the harsh antiparasitic herbs may worsen deficiency
- Avoid raw, cold, oily or greasy foods while taking it
Source: Chen JK, Chen TT. Chinese Herbal Formulas and Applications: Pharmacological Effects & Clinical Research. Art of Medicine Press, 2009, p. 1296.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
|
Bing Lang
cuo (grated) into thin particles and sun-dried; as printed: Bing Lang, cuo (grated) into thin particles and sun-dried (Semen Arecae) 20 pieces [120g]
|
120g | 9.76% | Jun (Chief) | kills and expels parasites |
|
Shi Jun Zi
as printed: Shi Jun Zi (Fructus Quisqualis) 150g
|
150g | 12.2% | Jun (Chief) | kills and expels parasites |
|
Huang Lian
as printed: Huang Lian (Rhizoma Coptidis) 300g
|
300g | 24.39% | Chen (Deputy) | clears Stomach heat |
|
Rou Dou Kou
wei (roasted); as printed: Rou Dou Kou, wei (roasted) (Semen Myristicae) 150g
|
150g | 12.2% | Chen (Deputy) | aromatic; strengthens Spleen, relieves loose stools |
|
Shen Qu
chao (dry-fried); as printed: Shen Qu, chao (dry-fried) (Massa Fermentata) 300g
|
300g | 24.39% | Zuo (Assistant) | strengthens Spleen, harmonizes middle jiao, reduces food stagnation |
|
Mai Ya
chao (dry-fried); as printed: Mai Ya, chao (dry-fried) (Fructus Hordei Germinatus) 150g
|
150g | 12.2% | Zuo (Assistant) | strengthens Spleen, reduces food stagnation |
|
Mu Xiang
as printed: Mu Xiang (Radix Aucklandiae) 60g
|
60g | 4.88% | Zuo (Assistant) | regulates qi to relieve abdominal pain |
Energetics dose-weighted
The formula's overall nature, taste balance and channel reach, weighted by each herb's dose. Classical formulas often pair warm and cool herbs on purpose, so a net figure summarises the mix — it doesn't describe every herb in it.
Nature
Net neutral (+0.15)
From 100% of the weighed grams.
Grams by band: cold 24%, neutral 12%, warm 63%.
Taste
- pungent 32%
- sweet 37%
- bitter 32%
From 100% of the weighed grams.
Channels reached
- Stomach 100%
- Spleen 90%
- Large intestine 51%
- Liver 37%
- Gallbladder 29%
- Heart 24%
Share of the grams entering each channel, from 100% of the weighed grams.
Dose-weighted from each herb's recorded nature, taste and channels (missing values are left out, never counted as neutral). It describes the composition — it is not a recommendation.
Preparation
Source text: powder and form tiny pills (size of Su Mi, millet) with pig gallbladder bile; 30 pills daily on an empty stomach, adjusted for age. Today: sifted powder formed into 3g pills with fresh pig bile; dissolve 1 pill in boiled water on an empty stomach; reduce for infants under one year.
Relationships
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Formula family
Full herb lists
- This formula = Xiang Lian Wan + Bing Lang, Shi Jun Zi, Rou Dou Kou, Mai Ya and Shen Qu
Each entry reads as the larger formula written out: “+” adds its other catalogue cores, then the herbs none of them hold. A catalogue formula counts as a core only when at least 80% of its herbs are present, no more than 1 is absent, and the absent herb is not its chief.
Formula Network
Formulas that share herbs with this one — the closer to the centre, the stronger the match. Click a node to explore.
Similar Formulas by composition
Match score combines dosage-weighted composition (cosine, 70%) with shared-herb overlap (Jaccard, 30%).
Traditional formula information is for educational purposes only. Herbal formulas should be prescribed by a qualified practitioner — dosages and combinations are individualized and can interact with medications.
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