Isatis leaf (Daqingye)
Isatis indigotia Fort.
Pharmaceutical Name: Folium Isatidis
Botanical Name: Isatis indigotia Fort.
Common Name: Isatis leaf.
Source of Earliest Record: Mingyi Bielu.
Part Used & Method for Pharmaceutical
Preparations: The leaves are gathered in summer or autumn and dried in the
sun.
Active Ingredients: Its active
ingredients include indirubin, isatin B, glucobrassicin, neoglucobrassicin, glucobrassicin-1-sulfonate, and
indigotin.
Properties & Taste: Bitter and very
cold.
Meridians: Heart, lung and stomach.
Functions: To clear heat and release
toxins.
Indications & Combinations:
1. Sore throat, erysipelas, boils,
carbuncles and furuncles. Isatis leaf (Daqingye) is used with Scrophularia
(Xuanshen) and Honeysuckle flower (Jinyinhua).
2. High fever with maculopapule. Isatis
leaf (Daqingye) is used with Moutan bark (Mudanpi).
3. For the syndromes of heat invasion of ying and
blood division and intense heat in both qi and blood division, manifested
as high fever and delirium, masculas and eruptions, hematemesis and epistasis,
it is used in combination with the blood-cooling and detoxicating drugs, as
rhinoceros horn and capejasmine fruit.
4. For swollen and sore throat, canker sores in
the mouth, skin and external diseases caused by excessive fire and noxious heat
dormant in the body, it is used in combination with the heat-clearing and
detoxicating drugs, such as scrophularia root, coptis root, dandelion herb,
etc.
In
addition, in clinical practice this herb was used in recent years to cure viral
diseases, as influenza, measles, and hepatitis.
Dosage: 10-15 g
Cautions & Contraindications: This
herb is contraindicated in cases with weakness and cold in the spleen and
stomach.
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