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The dried root of Euphorbia pekinensis (Euphorbiaceae). Enters the Lung, Spleen, and Kidney channels. A potent water-draining purgative that also reduces swelling and dissipates nodulations. Toxic; antagonistic to licorice root.
入丸散。有毒，醋制减毒。反甘草（十八反）
Reference range for non-pregnant adults. Not a personalized prescription. Pregnancy, lactation, and pediatric use require specialist supervision.
Protective guidance only — when to avoid or use with caution. This block deliberately omits pregnancy, lactation, and pediatric dosing: any such use must be managed by a qualified TCM practitioner or appropriate specialist.
味苦，寒。主蛊毒十二水，腹满急痛积聚，中风皮肤疼痛，吐逆。
下品
@misc{bencaodian-da-ji,
author = {{Bencaodian Editorial}},
title = {Dà Jǐ 大戟 (Peking Euphorbia Root) — Euphorbiae Pekinensis Radix},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/da-ji},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0
京大戟含大戟二萜酯类和三萜，为峻下逐水主要活性成分，毒性明显，醋制后减毒。
Jing Da Ji (Euphorbia pekinensis) contains diterpene esters and triterpenes as principal cathartic water-driving bioactives with marked toxicity; vinegar processing mitigates toxicity.
大戟苦寒有毒，泻水逐饮，消肿散结；禁与甘草同用。
Bitter-cold and toxic; drains water, reduces swelling, and disperses masses; incompatible with Gan Cao.
大戟所含二萜酯致严重胃肠刺激，剂量须严格限制并只用制品。
Da Ji diterpene esters cause severe GI irritation; dosage must be strictly limited and only processed material used.
This section is provided for academic reference only and does not constitute medical advice.