Herb
Isatis Leaf (Da qing ye)
大青叶da qing ye
1 sourceFolium Isatidis
Clears heat and resolves toxicity, cools the blood, and is recorded for epidemic heat, mouth sores, jaundice, throat blockage and erysipelas.
Source
Compendium of Materia Medica (Bencao Gangmu)卷十五·草部·隰草类上·大青·主治（《别录》）
References
- functions_en self-translated from 本草纲目 traditional_functions (public domain; the Chinese tf carries verbatim excerpt_hash citations). No modern work consulted.
- WHO IST-TCM terminology-aligned for the English rendering.
- public pharmacopoeia & botanical facts (public-domain reference facts; no proprietary modern source).
Traditional functions
Classical source text (Chinese) — English summary above.
传统中医记载：时气头痛，大热口疮（《别录》）；治热毒风，心烦闷，渴疾口干，小儿身热疾风疹，及金石药毒（大明）；主热毒痢，黄疸、喉痹、丹毒（时珍）。
Nature, flavor & meridians
Nature & flavor: 苦，大寒，无毒（时珍谓甘、微咸，不苦）。
Citations
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青（《别录》中品）Cited from Compendium of Materia Medica (Bencao Gangmu) for its classification.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·释名Cited from Compendium of Materia Medica (Bencao Gangmu) for its alternate names.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·气味Cited from Compendium of Materia Medica (Bencao Gangmu) for its nature & flavor.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·主治（《别录》）Cited from Compendium of Materia Medica (Bencao Gangmu) for its traditional functions.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·主治（大明）Cited from Compendium of Materia Medica (Bencao Gangmu) for its traditional functions.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·主治（时珍）Cited from Compendium of Materia Medica (Bencao Gangmu) for its traditional functions.
- Compendium of Materia Medica (Bencao Gangmu) · Li Shizhen · 卷十五·草部·隰草类上·大青·气味Cited from Compendium of Materia Medica (Bencao Gangmu) for its safety notes.