title: Evidence for opioid receptor interactions in vivo.
authors.affiliation: Department of Pharmacology, University of Arizona Health Sciences Center, Tucson 85724.
authors.forename: J S
authors.initials: JS
authors.lastname: Heyman
authors.forename: F
authors.initials: F
authors.lastname: Porreca
mesh_terms: D000818:Animals; D002552:Cerebral Ventricles / Q000187:drug effects / Q000502:physiology; D020881:Enkephalin, D-Penicillamine (2,5)-; D004745:Enkephalins / Q000494:pharmacology; D007276:Injections, Intraventricular; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D009020:Morphine / Q000494:pharmacology; D009294:Narcotics / Q000008:administration & dosage / Q000494:pharmacology*; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000187:drug effects / Q000502:physiology*
chemical_list: D004745:Enkephalins; D009294:Narcotics; D011957:Receptors, Opioid; D009020:Morphine; D020881:Enkephalin, D-Penicillamine (2,5)-