title: Tolerance to the antinociceptive effect of morphine in the spinal rat.
mesh_terms: D006916:5-Hydroxytryptophan / Q000494:pharmacology; D000700:Analgesics; D000818:Animals; D004361:Drug Tolerance; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D012701:Serotonin / Q000378:metabolism; D013116:Spinal Cord / Q000502:physiology*; D013375:Substance Withdrawal Syndrome / Q000139:chemically induced
chemical_list: D000700:Analgesics; D012701:Serotonin; D009270:Naloxone; D009020:Morphine; D006916:5-Hydroxytryptophan