title: Effect of chemical sympathectomy on morphine antinociception and tolerance development in the rat.
mesh_terms: D000700:Analgesics / Q000494:pharmacology; D000818:Animals; D001923:Brain Chemistry / Q000187:drug effects; D004298:Dopamine; D004361:Drug Tolerance / Q000187:drug effects; D006801:Humans; D006892:Hydroxydopamines / Q000494:pharmacology*; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009638:Norepinephrine / Q000032:analysis; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D013375:Substance Withdrawal Syndrome; D013562:Sympathectomy; D013997:Time Factors
chemical_list: D000700:Analgesics; D006892:Hydroxydopamines; D009020:Morphine; D004298:Dopamine; D009638:Norepinephrine