title: Tolerance and cross-tolerance studies with morphine and ethylketocyclazocine.
mesh_terms: D000818:Animals; D003496:Cyclazocine / Q000031:analogs & derivatives* / Q000494:pharmacology; D004343:Drug Implants; D004361:Drug Tolerance; D016314:Ethylketocyclazocine; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time / Q000187:drug effects
chemical_list: D004343:Drug Implants; D016314:Ethylketocyclazocine; D009020:Morphine; D003496:Cyclazocine