title: Resemblance of morphine antinociception to the central depressant actions of norepinephrine.
mesh_terms: D000700:Analgesics; D000818:Animals; D001921:Brain / Q000187:drug effects; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D009638:Norepinephrine / Q000494:pharmacology*; D051381:Rats; D013973:Thyrotropin-Releasing Hormone / Q000037:antagonists & inhibitors; D014992:Xylenes / Q000037:antagonists & inhibitors
chemical_list: D000700:Analgesics; D014992:Xylenes; D009270:Naloxone; D013973:Thyrotropin-Releasing Hormone; D009020:Morphine; D009638:Norepinephrine