用1987、1988、1989年3年分别采集的麻黄,对其平喘、镇咳及中枢兴奋作用进行了对比性动物实验研究,结果表明:随着贮存时间的延长,麻黄的平喘与镇咳作用逐年递减,组间比较,差异性非常显著(P<0.05,P<0.01),说明就疗效而言,麻黄不宜用“陈”者。但其中枢兴奋作用,则随着贮存时间的延长而明显减弱。 Using the ephedra collected in 1987, 1988 and 1989 for 3 years, a comparative animal study was conducted on asthma, antitussive and central stimulant effects. The results showed that with the prolongation of storage time, ephedra can relieve asthma and cough. The effect was decreasing year by year, and the difference between groups was very significant (P<0.05, P<0.01), indicating that in terms of efficacy, ephedra should not be used as “Chen”. However, the central excitatory effect was significantly reduced with the extension of storage time.