[Pharmacologic effects in combined use of oxyfedrine and beta-acetyldiogoxin]

In guinea pigs the toxic effect of beta-acetyldigoxin was not increased by simultaneously administered 3-(beta-hydroxy-alpha-methyl-phenethyl-amino)-3'-methoxy-propiophenone (oxy-fedrine). There was no evidence of a potentiation of the glycoside effect by the combination with oxyfedrine (ildamen-Novodigal). The threshold dose for arrhythmia was increased: typical glycoside tachyarrhythmias only occurred after higher infused doses. In anesthetized dogs with heart failure by overdosed pentobarbital, the therapeutic effects of beta-acetyldigoxin were sustained and enhanced by oxyfedrine.