Di Dang Tang
Star抵当汤 (Resistance Decoction)
Source: Shang Han Lun (c. 220)
Last updated October 1, 2026
Description
Di Dang Tang (Resistance Decoction), from Treatise on Cold Damage (Shang Han Lun).
Actions: Break up blood and discharge blood stasis
Indications: Indicated for the treatment of lower jiao blood amassment syndrome, with stiffness and fullness in the lower abdomen, normal micturition, forgetfulness, like mania or abalienatio mentis, black stool but easiness in defecation, deep and excess pulse, and female menstrual block, stiffness and fullness in the lower abdomen which refuses pressure
Category: Formulas That Invigorate Blood and Dispel Stasis.
Source: Xi S, Gong Y. Essentials of Chinese Materia Medica and Medical Formulas: New Century Traditional Chinese Medicine. Academic Press/Elsevier, 2017, pp. 692–700.
Composition
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.
The combination of two insect medicinals breaks severe, entrenched blood stasis far more forcefully than plant blood-movers.
Blood amassment in the lower burner with lower abdominal hardness and mania; very harsh, contraindicated in pregnancy and in bleeding or deficiency.
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 cool (-0.90)
From 100% of the weighed grams.
Grams by band: cold 45%, neutral 55%.
Taste
- sweet 13%
- bitter 73%
- salty 15%
From 100% of the weighed grams.
Channels reached
- Liver 100%
- Large intestine 70%
- Stomach 45%
- Spleen 45%
- Pericardium 45%
- Lung 25%
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
Decoct the ingredients with water for oral use
Relationships
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Formula family
Full herb lists
- Da Huang Zhe Chong Wan = this formula + Di Dang Wan + Xia Yu Xue Tang + Shao Yao Gan Cao Tang + Gan Qi, Qi Cao, Huang Qin, Sheng Di Huang and Xing Ren
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.
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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