title: Restoration of morphine analgesia in morphine-tolerant rats after the intraventricular administration of 6-hydroxydopamine.
mesh_terms: D000698:Analgesia; D000818:Animals; D001923:Brain Chemistry; D002552:Cerebral Ventricles; D004298:Dopamine / Q000032:analysis; D004361:Drug Tolerance / Q000187:drug effects*; D006892:Hydroxydopamines / Q000494:pharmacology*; D007031:Hypothalamus / Q000032:analysis / Q000187:drug effects; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009043:Motor Activity / Q000187:drug effects; D009638:Norepinephrine / Q000032:analysis; D051381:Rats
chemical_list: D006892:Hydroxydopamines; D009020:Morphine; D004298:Dopamine; D009638:Norepinephrine