title: [3H]Etorphine receptor binding in vivo. Small fractional occupancy elicits analgesia.
mesh_terms: D000700:Analgesics; D000818:Animals; D001921:Brain / Q000378:metabolism; D004347:Drug Interactions; D005048:Etorphine / Q000378:metabolism* / Q000494:pharmacology; D006165:Guanylyl Imidodiphosphate / Q000494:pharmacology; D009019:Morphinans / Q000378:metabolism*; D009020:Morphine / Q000494:pharmacology; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D011957:Receptors, Opioid / Q000378:metabolism*; D013237:Stereoisomerism; D013997:Time Factors
chemical_list: D000700:Analgesics; D009019:Morphinans; D011957:Receptors, Opioid; D006165:Guanylyl Imidodiphosphate; D005048:Etorphine; D009020:Morphine