title: Decrease of tolerance and physical dependence on morphine by drugs affecting brain serotonin.
mesh_terms: D006916:5-Hydroxytryptophan / Q000494:pharmacology; D000818:Animals; D001923:Brain Chemistry; D005277:Fenfluramine / Q000494:pharmacology; D006801:Humans; D051379:Mice; D009021:Morphine Dependence / Q000517:prevention & control*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D012701:Serotonin / Q000378:metabolism*; D012702:Serotonin Antagonists / Q000494:pharmacology*; D014364:Tryptophan / Q000494:pharmacology
chemical_list: D012702:Serotonin Antagonists; D005277:Fenfluramine; D012701:Serotonin; D009270:Naloxone; D014364:Tryptophan; D006916:5-Hydroxytryptophan