The efficacy and function of Daqing

Diseases require improvement through medicine. Different diseases require different medicine choices. If you want to treat your disease well, you need to use the right medicine. The traditional Chinese medicine Daqing is also very helpful in treating certain diseases. Let’s take a look at this medicinal herb.

[Other names] Isatis indigo leaf, stinking isatis indigo leaf

[Source] Medicinal material source: the stems and leaves of the Verbenaceae plant Isatis indigofera.

[Original form] Daqing, shrub or small tree, 1-10m high. Young branches yellow-brown, pubescent, with firm, white pith. Simple leaves are opposite; petiole is 1.5-8cm long; leaf blade is papery, oblong-lanceolate, oblong, ovate-elliptic or elliptic, 6-20cm long, 3-9cm wide, apex acuminate or acute, base nearly rounded or broadly cuneate, entire, glabrous on both sides or sparsely pubescent along the veins, often with glandular dots on the back; lateral veins are 6-10 pairs. The corymbose cymes are terminal or axillary, 10-16cm long, 20-25cm wide, with linear bracts, 3-7mm long; the calyx is cup-shaped, 5-lobed at the apex, the lobes are triangular-ovate, pink, and covered with yellow-brown short hairs and inconspicuous glandular dots on the outside; the corolla is white, the corolla tube is slender, about 1cm long, 5-lobed at the apex, the lobes are ovate, about 5mm long; there are 4 stamens, extending out of the corolla together with the style. The fruit is spherical or obovate, 5-10mm in diameter, green, blue-purple when ripe, and the persistent calyx is red; the flowering and fruiting period is from June to February of the following year.

[Habitat distribution] Ecological environment: Grown on plains and roadsides below 1700m above sea level. hills. Under forests in mountains or beside stream valleys.

[Properties] Property identification: The leaves are slightly wrinkled, and some leaves and young branches are cut into small pieces. When the complete leaf is flattened, it is oblong to slender oval, 5-20cm long and 3-9cm wide; entire, gradually pointed at the apex, obtuse at the base, brown-yellow, brown-yellow-green to dark brown-red above, lighter below; petiole 1.5-8cm long; papery and brittle. It has a slight odor and tastes slightly bitter and astringent. Large, sessile leaves are preferred.

[Chemical composition] The leaves contain cvrtophyllin, melissylalcohol, n-pentacosane, γ-sitosterol, isoprene pelymer, galactitol, stimasterol, tannins and flavonoids. The stems contain cyrtophyllone A, B, teuvincenone F, sugid, friedelin, clerodolone, clerosterol, and stigina-5, 22, 25.trien-3β-ol.

[Pharmacological action] 1. Anti-pathogenic microbial effect: The decoction of Isatis indigotica has a bactericidal effect on various Shigella dysenteriae in test tubes; the experiment also showed that Shigella dysenteriae, whether sensitive or resistant to furacilin, sulfathiazole, and berberine, are very sensitive to Isatis indigotica. It also has a killing effect on meningococci. It also has a killing effect on the Pomona group of Treponema colitis, the Walden type of the icterohaemorrhagiae group, and the Hesperidian type of the spirochete. Folium Isatidis is used clinically for a variety of viral infections, but no reports of antiviral trials in the laboratory have been found so far.

[Toxicity] The median lethal dose of isocyanidin for mice by oral administration is 8g/kg; intraperitoneal injection is 5g/kg.

[Processing] Take the original medicinal materials, remove impurities, wash them with water, moisten them slightly, cut them into shreds, and dry them. Medicinal material properties: irregular filaments. Often wrinkled, curled or broken. The upper surface is brownish yellow, brownish yellow green to dark brownish red, while the lower surface is lighter in color. Papery and brittle. It has a slight odor and tastes slightly bitter and astringent. Store in a dry container in a ventilated and dry place.

【Nature and flavor】 Bitter; Cold

【Meridian】 Stomach; Heart meridian

【Functions and indications】 Clears away heat and detoxifies; cools blood and stops bleeding. It is used for exogenous febrile diseases with excessive heat and thirst; sore throat; mouth sores; jaundice; dysentery caused by heat toxins; acute enteritis; carbuncle and swelling; epistaxis; hematuria; bleeding caused by trauma

[Usage and Dosage] For oral use: decocted in water, 15-30g, double the amount for fresh products. For external use: take appropriate amount and mash it for application; or boil it in water for washing.

【Note】 People with weak spleen and stomach should take it with caution.

[Additional prescription] The leaves of this herb are relatively large. "Compendium of Materia Medica" says: "Its stems and leaves are all dark green", so it is named Daqing. The names of other "Qing" have the same meaning. Because the plant has a peculiar smell, it is named "shit" or "stinky".

[Discussions by various schools] Daqing is cold in nature and good at relieving heat and toxins from the heart and stomach.

【Clinical Application】 "Depei Materia Medica": "With good wine, it can treat dark blue belly; with rhinoceros horn and gardenia, it can treat yang poison spots."

【Excerpt】 Chinese Materia Medica

The effects and functions of Daqing have been described in detail above, and I believe everyone has a certain understanding of it. Whether Daqing has other therapeutic effects still requires further research.