title: Effect of depletion of rat brain 5-hydroxytryptamine on morphine-induced antinociception.
mesh_terms: D000700:Analgesics; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D004298:Dopamine / Q000378:metabolism; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009638:Norepinephrine / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time / Q000187:drug effects; D012701:Serotonin / Q000378:metabolism / Q000502:physiology*
chemical_list: D000700:Analgesics; D012701:Serotonin; D009020:Morphine; D004298:Dopamine; D009638:Norepinephrine