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The dried rhizome and root of Thalictrum foliolosum or related Thalictrum species (Ranunculaceae). Enters the Heart, Liver, Stomach, and Large Intestine channels. Bitter and cold, Ma Wei Lian clears heat, dries dampness, drains fire, and resolves toxin, with clinical applications overlapping those of Huang Lian — it is used as a substitute in damp-heat dysentery, heat-toxin sores, and stomach-fire mouth ulcers, particularly in regions where Coptis is scarce.
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.
（时珍曰）马尾黄连（马尾连）形细而苦寒，功用近似黄连，医者常用以代之。
草部
@misc{bencaodian-ma-wei-lian,
author = {{Bencaodian Editorial}},
title = {Mǎ Wěi Lián 马尾连 (Meadowrue Rhizome) — Thalictri Rhizoma},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/ma-wei-lian},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0
马尾连含小檗碱、唐松草碱等异喹啉生物碱，药理作用类似黄连，具抗菌、抗炎、抗腹泻及降糖作用。
Ma Wei Lian contains berberine and thalicarpine-type isoquinoline alkaloids with antibacterial, anti-inflammatory, antidiarrheal, and hypoglycemic effects similar to Huang Lian.
马尾连苦寒，为黄连代用品，清热燥湿，泻火解毒。
Bitter-cold; used as Huang Lian substitute for heat-clearing, damp-drying, and fire-draining.
This section is provided for academic reference only and does not constitute medical advice.