The interaction of ephedrine with beta-adrenoceptors in tracheal, cardiac and skeletal muscles.

Abstract

Three beta-adrenoceptor mediated effects were measured in vitro on tissues from guinea-pig: (a) relaxation of the trachea (mainly beta 2), (b) increase in the force of contraction of the papillary muscle (beta 1), and (c) depression of the subtetanic contractions of the soleus muscle (beta 2). The relaxant effect of ephedrine on the trachea was weak but was… (More)

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