title: Substance P involvement in the expression of gut dependence on opiates.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004361:Drug Tolerance; D005769:Gastrointestinal Motility / Q000187:drug effects; D006168:Guinea Pigs; D006632:Histamine / Q000494:pharmacology; D007082:Ileum / Q000294:innervation*; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D011957:Receptors, Opioid / Q000187:drug effects*; D013373:Substance P / Q000502:physiology*
chemical_list: D011957:Receptors, Opioid; D013373:Substance P; D009270:Naloxone; D009020:Morphine; D001285:Atropine; D006632:Histamine; D000109:Acetylcholine