Medicinals

dà qīng yè / 大青叶 / 大青葉 / isatis leaf;

Latin pharmacognostic name: Isatidis Folium

Alternate English names: woad leaf

Alternate Chinese names: 大青 dà qīng

Origin: Plant

Use: medicinal

Category: Heat-clearing agents / Heat-clearing toxin-resolving agents

Properties: Bitter, salty; cold.

Channel entry: lung, stomach, and heart channels.

Indications:

  • Clears heat and resolves toxin; cools the blood and disperses macules: Warm heat disease and externally contracted wind-heat patterns.
  • Clears fire and resolves toxin; disinhibits the throat and disperses swelling: Exuberant heat toxin in the blood causing cinnabar toxin (erysipelas), mouth sores, or painful swollen throat.

Dosage & Method:

Oral: 10–15g in decoctions. Also used externally.

Warning:

Contraindicated in spleen-stomach vacuity cold.

Quality:

Large leaves without petioles are the best.

Product Area:

Héběi, Jiāngsū, Húnán, Jiāngxī.

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