This product is the leaves of Isatis indigodica (Isatis indigodica Fort.), a biennial herbaceous plant of the Brassicaceae family. Mainly produced in Jiangsu, Anhui, Hebei, Henan, Zhejiang and other places. Cultivation in winter, harvesting in summer and autumn. Use fresh or dried.

Pharmacopoeia Dyers Woad uses woad as the authentic product. In addition, creeping rostellularia herb is a perennial shrubby herbaceous plant of the family Polygonaceae (Baphicacanthus cusia (Nees) Bbremek). polygonum tinctoriumAit), European Verbena Herb family deciduous shrub roadside green (clerodendron cyrtophyllumTurcz), etc. are also used as Dyers Woad in different areas.

bitter and salty, extremely cold. act on heart, lung and stomach channels.

[Efficacy]

clearing heat and removing toxin, cooling blood and removing spots.

[Indications]

1. It is used to heat nutrient-blood and warm toxin disease. This product is bitter and cold, good at relieving heat and toxin caused by excess fire in the heart and stomach meridians. It is salty and cold in the blood aspect, and can cool blood and eliminate spots. Therefore, it can be used to treat heat in the nutrient-blood, heart and stomach toxins, blazing of both qi and blood, and warm Toxin disease and other syndromes are often used synonymously with Gardenia. This product can also be used to treat syndrome/pattern of common cold due to wind and heat, the onset of warm disease, fever headache, thirst and sore throat. It is often used with Lonicera and Forsythia, Great Burdock Achene and other medicines can be used together.
2. For pharyngitis aphtha, erysipelas carbuncle. This product is bitter and cold. It not only clears excess fire in the second stomach meridian of the heart, but also is good at relieving pestilence and seasonal toxin. It has the effect of removing toxin disinhibiting benifiting the pharynx. It is used to treat heart and stomach fire, upper attack of pestilence, fever headache, mumps pharyngitis, sore throat, sores on the mouth and tongue. It is often taken orally with fresh product made into juice, or mixed with Scropularia Root, vietnamese sophora root, Coptis Rhizome and other compounds are used to treat erysipelas carbuncle and other diseases. The fresh product can be mashed and applied externally, or combined with Dandelion, Tokyo Violet Herb, chinese manyleaf paris rhizome and other medicines should be taken orally by decoction.

[Documentation]

1. Bielu: "Treat seasonal epidemic headache, fiery heat, aphtha."
2. Bencao Zheng: "Treat pestilence, heat toxin, spots, wind-heat macula." and papule, carbuncle, swollen and painful, relieves polydipsia, epistaxis, hematemesis... Anyone who suffers from both heat and poison should use blue leaves pounded into juice."
3. Bencao Gangmu: "Mainly used for heat. toxin dysentery, jaundice, pharyngitis, erysipelas"

[Usage and Dosage]

Decoction, 10-15g, fresh product 30-60g. Appropriate amount for external use.

[Precaution]

It should not be used in cases of deficiency-cold of spleen and stomach.

Woad leaves contain tryptophan, isatin B, glucobrassinoids, new glucobrassinoids, glucosinolates-1-sulfonate and indigo. Malan leaves contain indigo, which is hydrolyzed to form hydroxyindole, and hydroxyindole is oxidized to form indigo. The whole plant of Polygonum indica contains indigoside, yellow pigment and tannin. Roadside species contain indigoside, Dyers Woad glycoside.

• Roadside green has an inhibitory effect on dysentery bacilli, meningococci, and Leptospira;
• Polygonium has an inhibitory effect on Staphylococcus aureus, can enhance the phagocytic ability of white blood cells, and can reduce skin inflammation. Capillary permeability, anti-arthritis, antipyretic and other effects;
• Woad and horsetail leaves have certain inhibitory effects on Staphylococcus aureus and hemolytic streptococci;
• Dyers Woad leaves have a certain inhibitory effect on the surface of hepatitis B The antigen has an inhibitory effect on influenza virus subtype A.