Zhi Shi Xiao Pi Wan — Aurantium Pill to Reduce Focal Distention
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Overview
Zhi Shi Xiao Pi Wan — the “Aurantium Pill to Reduce Focal Distention” — is a Jin-Yuan-dynasty formula from Li Dongyuan (also known as Li Gao) in his Lan Shi Mi Cang (Secrets from the Orchid Chamber, 1336). It is one of the most elegantly balanced formulas in the materia medica, addressing the complex pattern of chronic epigastric focal distention from combined Spleen Qi deficiency, Cold-Heat complexity in the middle burner, and food retention.
The formula combines Qi-moving herbs (Zhi Shi, Hou Po) with Heat-clearing (Huang Lian), warming (Gan Jiang), Spleen-tonifying (Ren Shen, Bai Zhu, Fu Ling), digestive (Mai Ya, Ban Xia Qu) and harmonising (Zhi Gan Cao) herbs. It is a sophisticated formula for chronic, complex dyspepsia that doesn’t respond to simpler approaches.
I prescribe Zhi Shi Xiao Pi Wan as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan.
TCM pattern
Zhi Shi Xiao Pi Wan is prescribed for focal epigastric distention from Spleen Qi deficiency with mixed Cold-Heat and food retention:
- Persistent epigastric fullness and distention — uncomfortable on pressure
- Belching
- Mild nausea
- Reduced appetite
- Bloating
- Loose stools or alternating bowel habit
- Fatigue
- Possibly mild bitter taste
- Tongue — pale or slightly red, thick or yellow-tinged coat
- Pulse — wiry or slippery, slightly weak
Key herbs
- Zhi Shi — chief; breaks stagnation in the chest and epigastrium
- Hou Po — transforms Damp and moves Qi
- Huang Lian — clears Stomach Heat
- Gan Jiang (small dose) — warms the middle
- Ban Xia Qu (fermented pinellia) — transforms Phlegm; helps digestion
- Mai Ya (malt) — helps digest starch; promotes appetite
- Ren Shen — tonifies Spleen Qi
- Bai Zhu — tonifies Spleen and dries Damp
- Fu Ling — drains Damp
- Zhi Gan Cao — harmonises
Formula actions
- Resolves focal distention
- Strengthens the Spleen
- Harmonises Stomach and resolves food retention
- Balances Cold and Heat in the middle burner
Conditions treated
- Chronic functional dyspepsia with focal epigastric distention — see digestive disorders
- Chronic gastritis with mixed pattern
- Post-gastric-surgery dysmotility
- IBS with epigastric symptoms — see IBS
- SIBO (small intestinal bacterial overgrowth) with bloating and mixed pattern
- Chronic gastroparesis with mixed pattern
- Helicobacter pylori-associated gastritis (alongside conventional eradication)
Cautions
Persistent epigastric symptoms with weight loss, anaemia, dysphagia or vomiting blood need urgent gastroenterology assessment to exclude gastric cancer and other serious pathology.
Generally well-tolerated; use cautiously in pregnancy.
Always consult a qualified Chinese herbalist registered with the RCHM.
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