Bu Huan Jin Zheng Qi San不换金正气散

Correct Qi Powder Worth More Than Gold

Expelling Dampness 祛湿剂Dry Damp and Harmonize the Stomach 燥湿和胃

Ingredients6 herbs

HerbDosageWhat it does in this formula

藿Huo Xiang藿香Pogostemonis Herba10gThe first addition — aromatically transforms damp and releases a light surface chill 厚Hou Po厚朴Magnoliae Officinalis Cortex10gMoves qi downward and disperses fullness of the epigastrium 苍Cang Zhu苍术Atractylodis Rhizoma10gDries damp and wakes the Spleen, the core of the parent formula 陈Chen Pi陈皮Citri Reticulatae Pericarpium10gRegulates qi and helps Ban Xia settle nausea 半Zhi Ban Xia半夏Pinelliae Rhizoma praeparatum10gThe second addition — dries damp and directs Stomach qi down to stop vomiting 甘Zhi Gan Cao甘草Glycyrrhizae Radix Praeparata10gHarmonizes the formula and moderates the drying herbs

Indications

Dries damp and moves qi in the middle burnerHarmonizes the Stomach and stops vomitingDisperses a mild exterior chillRelieves distension and fullness of the epigastrium

Damp turbidity obstructing the middle burner with a mild exterior cold. Damp blocks the descent of Stomach qi so it rebels upward, while the surface remains lightly closed by cold.

Clinical Manifestations

Vomiting with epigastric and abdominal distension
Diarrhoea after a change of food, water or climate
Damp stagnation in the middle burner with chills and low fever
Nausea with a thick greasy tongue coating and no appetite
Heavy limbs with a muzzy head from damp

TongueThick, white and greasy coating

PulseSoggy or moderate

Health Categories

Digestive Health

Modern Applications

Gastroenteritis Traveller's diarrhoea Nausea and vomiting Functional dyspepsia Bloating

Common adjustments

Vomiting is severe — increase Sheng Jiang 生姜 and add Sha Ren 砂仁
Food stagnation as well — add Shen Qu 神曲 and Mai Ya 麦芽
The exterior chill is pronounced — add Zi Su Ye 紫苏叶
Diarrhoea predominates — add Fu Ling 茯苓 and Ze Xie 泽泻

Contraindications

The formula is drying and aromatic throughout. It is wrong for damp-heat with a yellow greasy coating, for vomiting from Stomach yin deficiency with a red peeled tongue, and for thirst with scanty dark urine from heat.

For licensed practitioners’ reference only — not a self-treatment guide.

Pregnancy

Use with caution in pregnancy — the formula is strongly drying and aromatic, and Ban Xia is traditionally used in pregnancy only under close supervision. Prescribe only on a practitioner's assessment.

Related Formulas

References

Source Yi Jian Fang 《易简方》 · Song

Classical source of record (public domain).
2. Scheid, Bensky, Ellis & Barolet. Chinese Herbal Medicine: Formulas & Strategies, 2nd ed. — composition & dosage cross-checked.
3. 《方剂学》（全国中医药行业高等教育规划教材）— 附方 note and pattern analysis cross-checked.

Professional reference notice. Entries are scholarly references for licensed TCM practitioners and students — not medical advice, and not a recommendation to self-prescribe. Chinese herbal formulas should be used under the guidance of a qualified practitioner. Content is an original editorial compilation by Cura x Cura, cross-checked against the cited references.