Objective: Qinggan Ningfei Decoction treating mechanisms of the cough variant asthma were studied. Methods: By ovalbumin (OA) and belly cavity, CVA rat model was made and divided into normal matched control group, model matched control group, dexamethasone tablet grtoup,Qinggan Ningfei Dection Cough times 2 mins and the contents of IL - 6, IgE and ICAM - 1 in the serum were used for index sign. Results : Compared with the normal control group, model matched control~ cough number obviously increased ( P 〈 0.01 ), the content of IgE, IL -...