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Dà Jì 大戟

Pharmaceutical name Knoxiae/Euphorbiae Radix “big lance”
Category Downward Draining
Key Properties Powerfully drives pathogenic fluids
Properties Bitter
Tropism KD, LI, SP
Actions & Indications 1) Drains Water Downwards & Drives Out Thin Mucus
(From Chest & flank, via anus)
2) Reduces Swellings & Dissipates Nodules
Dosages 1.5-3g
Contraindications (TCM) CI: Pregnancy, Blood, Yin, Yang Def, excessive bleeding, historyof ulcers, upper gastrointestinal bleeding, cardiovascular disorders, kidney impairment

Euphorbiae is much more toxic than Knoxiae
Contraindications (Western)
Chemical Composition Euphorbon, alkaloids, vitamin C, euphorbia A, B, C
Pharmacological Effects • Cathartic: both water and alcohol extracts have marked cathartic effects
• Antibiotic: inhibitory effect against S. aureus, Pseudomonas aeruginosa, Bacillus dysenteriae, Diplococcus pneumoniae, and β-hemolytic streptococcus
Herb-Drug Interactions • Incompatible with Gan Cao (Glycyrrhizae Radix)
Classical Formula(s)


This information is a reference tool for Chinese herbal studies. It is not intended to replace professional medical advice. Please consult a primary health professional if you require health advisory.