Traditional Chinese Medicine Healing Herbs(TCMHH)

Drastic Hydragogues

Hong Da Ji

红大戟 Knoxia Root Radix Knoxiae 紅大戟
By the TCMHH editorial team Not medically reviewed How we work Updated 6 Oct 2026
Hong Da Ji
Hong Da Ji
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Hong Da Ji

Name

Hong Da Ji (Knoxia Root)

The Effect of Hong Da Ji

Property

Bitter, cold, slightly toxic; lung, spleen and kidney meridians entered.

Actions

Counteract toxic pathogen, drive out accumulated water, resolve swelling and dissipate nodulation.

Indications

Scrofula, sores and boils, difficulty in urination and defecation, subcutaneous nodule, thoracic and abdominal effusion.

Dosage and Administrations

Decoct 1.5~3 g or take the powder, 0.3~1 g, or made into pill or powder, or soaked in wine. Proper dosage is for external application, pounded for applying or decocted for washing.

Cautions

It is contraindicated to the weak and pregnant women.

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Sources and further reading

We cite classical materia medica and modern reference works. This article is health education, not medical advice.

  • Shennong Bencao Jing (The Divine Farmer's Materia Medica), Han dynasty.
  • Bencao Gangmu (Compendium of Materia Medica), Li Shizhen, 1578.
  • Chinese Pharmacopoeia, current edition — identity, quality and safety monographs.
  • NCCIH and WHO reference material on traditional medicine safety.

Spotted an error or a better source? Tell us — corrections are logged on our editorial policy page.

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