Studies on morphine tolerance in mice. I. In vivo N-demethylation of morphine and N- and O-demethylation of codeine.
D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis; D002247:Carbon Isotopes; D003061:Codeine / Q000378:metabolism*; D004361:Drug Tolerance; D008297:Male; D051379:Mice; D009020:Morphine / Q000008:administration & dosage / Q000378:metabolism*; D011874:Radiometry
D002247:Carbon Isotopes; D002245:Carbon Dioxide; D009020:Morphine; D003061:Codeine