Objective: To investigate the anti asthmatic effects and its mechanism of Yumian Anti asthma Formula (DYA) on asthmatic guinea pigs.

目的：探讨鱼棉平喘方（DYA）对嗜喘豚鼠的平喘作用及作用机理。

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Arresting cough, expectorant and anti-asthmatic effects. Intraperitoneal injection of water, methanol, ether and acid ethanol extracts of hua shu PI possesses anti-cough effect in mice.

止咳、祛痰与平喘作用。小鼠腹腔注射白桦树皮的水、甲醇、乙醚及酸性乙醇的提取物以及乙醚析出物，都有一定的止咳作用。

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Objective to study the antitussive, expectorant and anti-asthmatic effects of triterpene acids of loquat leaf (TAL).

目的研究枇杷叶三萜酸(TAL)的镇咳、祛痰和平喘作用。

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