Huo Xiang Zheng Qi San
Star藿香正气散 (Agastache Powder to Rectify the Qi)
Source: Tai Ping Hui Min He Ji Ju Fang (Song, 1107)
Last updated August 30, 2026
Description
Huo Xiang Zheng Qi San (Agastache Powder to Rectify the Qi) releases the exterior, transforms dampness, regulates Qi, and harmonizes the middle. It treats the simultaneous presence of exterior Wind-Cold and interior damp stagnation — a pattern common in summer colds. Widely used in China for acute gastroenteritis, food poisoning, motion sickness, and summer dampness conditions.
Composition
| Herb | Amount | % | Role | Function |
|---|---|---|---|---|
| Huo Xiang | 9g | 12% | Jun (Chief) | Releases the exterior, transforms dampness, harmonizes the middle, stops vomiting |
| Zi Su Ye | 6g | 8% | Chen (Deputy) | Releases the exterior and moves qi, aids Huo Xiang |
| Bai Zhi | 6g | 8% | Chen (Deputy) | Releases the exterior and scatters wind-cold-damp |
| Ban Xia | 6g | 8% | Zuo (Assistant) | Dries dampness, harmonizes the Stomach, stops vomiting |
| Chen Pi | 6g | 8% | Zuo (Assistant) | Regulates qi and dries dampness |
| Bai Zhu | 6g | 8% | Zuo (Assistant) | Strengthens the Spleen and dries dampness |
| Fu Ling | 6g | 8% | Zuo (Assistant) | Strengthens the Spleen and leaches dampness |
| Hou Po | 6g | 8% | Zuo (Assistant) | Moves qi, dries dampness, relieves fullness and distention |
| Da Fu Pi | 6g | 8% | Zuo (Assistant) | Moves qi and promotes water metabolism |
| Jie Geng | 6g | 8% | Zuo (Assistant) | Opens Lung qi and facilitates the chest |
| Gan Cao | 3g | 4% | Shi (Envoy) | Harmonizes the formula |
| Sheng Jiang | 3g | 4% | Shi (Envoy) | Harmonizes the Stomach and stops vomiting |
| Da Zao | 6g | 8% | Shi (Envoy) | Harmonizes the middle burner |
Total weight: 87g
Dui Yao — Core Herb Pairs
The classical two-herb combinations at the heart of this formula, as recorded on the herbs' own pages — each pair has an action neither herb has alone.
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 warm (+0.80)
From 100% of the weighed grams.
Grams by band: neutral 20%, warm 80%.
Taste
- pungent 60%
- sweet 20%
- bitter 16%
- bland 4%
From 100% of the weighed grams.
Channels reached
- Spleen 84%
- Lung 76%
- Stomach 76%
- Large intestine 32%
- Heart 12%
- Small intestine 8%
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
Available as powder, pills, or oral liquid. As decoction: simmer 15–20 minutes and take warm.
Dosage
Powder: 6–9g 2–3x/day. Oral liquid (Huo Xiang Zheng Qi Ye): 5–10mL per dose. Take warm for chills.
Conditions Addressed
Related Formulas
Relationships
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Formula family
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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