D-norpseudoephedrine as an anti-asthmatic: comparison with l-ephedrine, d-pseudoephedrine.
D000818:Animals; D001249:Asthma / Q000188:drug therapy*; D004809:Ephedrine / Q000494:pharmacology / Q000627:therapeutic use*; D006168:Guinea Pigs; D009130:Muscle, Smooth / Q000187:drug effects; D010665:Phenylpropanolamine / Q000494:pharmacology / Q000627:therapeutic use*; D014132:Trachea / Q000187:drug effects*
D010665:Phenylpropanolamine; D004809:Ephedrine