title: Behavioral interactions of apomorphine, clonidine and naloxone: possible presynatpic involvement.
mesh_terms: D000818:Animals; D001058:Apomorphine / Q000494:pharmacology*; D001522:Behavior, Animal / Q000187:drug effects*; D001835:Body Weight / Q000187:drug effects; D003000:Clonidine / Q000494:pharmacology*; D004347:Drug Interactions; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D012055:Reinforcement Schedule; D013569:Synapses / Q000187:drug effects*
chemical_list: D009270:Naloxone; D003000:Clonidine; D001058:Apomorphine