title: Narcotic agonist and antagonist potencies of a homologous series of N-alkyl-norketobemidones measured by the guinea-pig ileum and mouse vas deferens methods.
abstract: The narcotic agonist and antagonist potencies of the series of N-alkyl-norketobemidones from norketobemidone to decylnorketo-bemidone have been determined. The values obtained in the electrically stimulated preparations of the guinea-pig ileum and the mouse vas deferens are closely correlated. The agonist potencies observed in the guinea-pig ileum agree well with those found in the mouse hot-plate test (Oh-ishi & May) and those obtained by determining the inhibition of naloxone binding in brain homogenates (Wilson, Rogers, Pert & Snyder). The antagonist potencies in the guinea-pig ileum and, to a lesser extent, those in the mouse vas deferens agree with the values obtained in the morphine-dependent monkey.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D003864:Depression, Chemical; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D066298:In Vitro Techniques; D008297:Male; D051379:Mice; D009270:Naloxone / Q000378:metabolism; D009292:Narcotic Antagonists / Q000494:pharmacology*; D009294:Narcotics / Q000494:pharmacology*; D011930:Reaction Time / Q000187:drug effects; D014649:Vas Deferens / Q000187:drug effects*
chemical_list: D009292:Narcotic Antagonists; D009294:Narcotics; D009270:Naloxone