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It is the dried root and rhizome of Aster tataricus L.f.,family Compositae. The roots and rhizomes are dug and collected in spring and autumn. After the rhizomes with nodules, mud and sand are removed, they are dried in the sunshine and cut into thick slices. The raw or stir-baked with honey are used.

[ Medicinal Properties]: Pungent, bitter and warm; relate to lung meridian.

[ Medicinal Efficacies ]: Moisten lung, resolve phlegm and relieve cough.

[ Clinical Applications ]: Cough        To trat external contraction by wind-cold manifested as cough with profuse sputum, it is combined with Jingjie, Baiqian and Chenpi. It treats lung deficiency causing prolonged cough with hemoptysis, in combination with Zhimu, Chuanbeimu and Ejiao, such as Ziwan Decoction.

[ Usage and Dosage ]: 5-9g. The raw are used to treat external contraction by wind-cold .The stir-baked with honey are used to treat prolonged cough due to lung deficiency.

紫菀为菊科植物紫菀Aster tataricus L．f．的根及根茎。主产于东北、华北、西北及河南、安徽等地。春、秋二季采挖，除去有节的根茎，编成辨状晒干，切厚片生用，或蜜炙用。