Partial agonists at guinea-pig atrial beta-adrenoceptors display relaxation responses in the guinea-pig ileum independent of beta-adrenoceptor stimulation.


The beta-adrenoceptor mediated responses of oxyfedrine, ritodrine, tazolol, prenalterol, salbutamol and carteolol were examined on guinea-pig left and right atrial and ileal preparations. All agonists tested in left and right atrial preparations were partial agonists relative to isoprenaline. All agonists with the exception of salbutamol, which appeared a… (More)


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