Houttuynia cordata Thunb. is a kind of herbal medicine collected in the Chinese Pharmacopoeia. It is derived from the dried aerial parts of Brassica campestris. In summer, stems and leaves are luxuriant and flowers are cut for many times to remove impurities and dry.
Herbal Characters: The stem is oblate cylindrical, twisted, 20-35 cm long, 0.2-0.3 cm in diameter; the surface is brown yellow, with several longitudinal edges, knots obvious, lower knots with residual fibrous roots; brittle, easy to break. Leaves alternate, folded and shrunken, flattened and heart-shaped, 3-5 cm long and 3-4.5 cm wide; apex acuminate, entire; upper surface dark yellow-green to dark brown, lower surface gray-green or gray-brown; petiole slender, base and stipules connate into sheaths. Spikes terminal, yellow brown. There is a smell of fishy smell.
Houttuynia cordata is spicy, cold and cold, and belongs to the lung meridian. It can clear away heat and detoxify, detumerate swelling and treat sores, diuretic and dehumidify, clear away heat and stop dysentery, invigorate stomach and digest food. It can treat lung carbuncle, sore and swollen poison, hemorrhoids, stool and blood, spleen and stomach accumulate fever which are caused by excessive heat, heat toxicity, dampness evil and fever. Modern pharmacological experiments show that this product has antibacterial, antiviral, improve the body's immunity, diuretic and other effects.
The name of Houttuynia cordata is named "famous doctor". Tang Susong said: "raw wetland, the shade of the valley can also grow, leaves such as buckwheat and fat, purple red stem, Jiangzuo people like raw food, so-called tobacco in Guanzhong, leaves have fishy smell, so commonly known as: Houttuynia cordata. "See the famous doctor". Tang Susong said: "raw wetland, the shade of the valley can also grow, leaves such as buckwheat and fat, purple red stem, Jiangzuo people like raw food, so-called tobacco in Guanzhong, leaves have fishy smell, so commonly known as: Houttuynia cordata. "Produced in the southern provinces of the Yangtze River Valley in China, as early as the late 1980s, Gaoping Town, Guanghan City, Sichuan Province, introduced field-scale planting, has now led to the surrounding villages and towns nearly 10,000 mu of planting area, forming the largest ear-folding planting base in China.
A yellow oily substance extracted from Houttuynia cordata Thunb. can inhibit all kinds of microorganisms, especially yeast and mold. It can also inhibit hemolytic streptococcus, Staphylococcus aureus, influenza bacillus, catarrhal coccus and pneumococcus. It also has effects on E. coli, dysentery bacilli and typhoid bacilli. The synthetic sodium decyl acetaldehyde bisulfite adduct is called synthetic houttuynin. The synthetic sodium dodecyl acetaldehyde bisulfite adduct is called houttuynin. It has obvious inhibitory effect on many kinds of bacteria in vitro and in vivo: 62.5-80 mcg/ml for Staphylococcus aureus and penicillin-resistant MIC, 1.25 mg/ml for Bacillus influenzae. The H37RY strain of Mycobacterium tuberculosis was 16mcg/ml in the liquid culture medium. In the modified Sutong semisolid medium, the 25mcg/ml was 12.5mcg/ml. The synthesized houttuynin isonicotinazone had a strong effect on TB bacilli. The MIC of the synthesized houttuynin isonicotinazone was 0.78-3.1 mcg/ml, and it was effective on mice infected with TB. The survival time of mice was significantly prolonged by intraperitoneal injection of 1 mg per mouse for 62 days, and the effect of mixed feeding was better.