title: Enkephalin may mediate euphoria and drive-reduction reward.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects*; D004050:Ditiocarb / Q000494:pharmacology; D004328:Drive; D004745:Enkephalins / Q000008:administration & dosage / Q000494:pharmacology*; D005059:Euphoria / Q000187:drug effects*; D005260:Female; D007276:Injections, Intraventricular; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D009842:Oligopeptides / Q000494:pharmacology*; D051381:Rats; D012646:Self Administration; D012653:Self Stimulation / Q000187:drug effects / Q000502:physiology; D013329:Structure-Activity Relationship
chemical_list: D004745:Enkephalins; D009842:Oligopeptides; D009270:Naloxone; D009020:Morphine; D004050:Ditiocarb