Effect of nalorphine and levallorphan on brain concentrations of levorphanol in the dog.
D000818:Animals; D001693:Biological Transport, Active; D001812:Blood-Brain Barrier; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002247:Carbon Isotopes; D004285:Dogs; D007977:Levallorphan / Q000378:metabolism* / Q000494:pharmacology*; D009269:Nalorphine / Q000494:pharmacology*
D002247:Carbon Isotopes; D007977:Levallorphan; D009269:Nalorphine