This invention relates to a highly active effective fraction of the
Epiglottis-Clearing Decoction and its application in the preparation of antitussive
drug compositions, belonging to the field of
traditional Chinese medicine extract technology. The effective fraction contains hydroxysaffron yellow A,
paeoniflorin,
naringin, and
neohesperidin, with the total content of these four components not less than 20% of the total
mass of the effective fraction. The effective fraction of this invention is prepared by purification with
macroporous resin. Compared with the freeze-dried
powder of the traditional
Epiglottis-Clearing Decoction, the total content of the four active ingredients is increased from 3.32% to 20.87%, achieving a more than 6-fold high-efficiency enrichment. Animal pharmacodynamic experiments show that the antitussive effect of a
low dose (275.5 mg / kg) of this effective fraction is comparable to that of the freeze-dried
powder of the original decoction (1928 mg / kg), reducing the dosage to about 1 / 7 of the original formula, demonstrating a significant "synergistic effect with reduced dosage" technical effect. The effective active ingredients provided by this invention have a clear content and stable quality, and can be made into modern preparations such as tablets, capsules or granules, solving the problems of large volume, inaccurate dosage and poor
patient compliance of traditional decoctions.