Coltsfoot Asteraceae perennial herb coltsfoot Tussilago farfara L. buds. Cultivated or wild. Mainly produced in China, Shaanxi, Henan, Shanxi, Gansu, Qinghai, Hebei, Sichuan, Inner Mongolia and other places.
The role of the respiratory system with cough, phlegm and slight asthma. Eastern Europe is also used in some areas of preparation or treatment of bronchitis Coltsfoot leaves, pharyngitis and bronchial asthma, oral antitussive Coltsfoot decoction have a significant effect, but not lasting. Coltsfoot ether extract a small amount can make a slight bronchial relaxation, but large doses of contraction; for histamine-induced spasm, its antispasmodic effect is indeed better than theophylline. Some people think that the nitrate contained therein are cough ingredients. The role of the circulatory system to reduce elevated blood pressure after the first role, according to component separation tests showed that some alcohol-ether-soluble Coltsfoot was pressor effect, alcohol ether-insoluble fraction was antihypertensive effect, its boost initial action principle that is due to the excitement of sympathetic ganglia, sympathomimetic effects on the central nervous stimulant and Direct excitement of vascular smooth muscle, and other effects due. Decoction and alcohol extract on isolated toad heart was inhibited. Ether extract of frog limb and systemic vascular perfusion showed a contraction. Other effects ether extract showed inhibition in vivo or in vitro gastrointestinal smooth muscle. Vitro uterus, a small amount of alcohol extract liquid when excited, after a lot of the first excited suppression, or a start that was suppressed. Coltsfoot leaves ether extract and distillate was also found on the isolated rabbit intestinal spasm
For cough, asthma, lung deficiency cough embolism. Coltsfoot better Huatanzhike role in the treatment of cough or cough with it, often with the use of Aster, to be received under the gas efficiency of phlegm. Its warm, it is more appropriate for cold, cough, if properly compatibility, can also be used Tansou blood embolism.