title: Unexpected reversal effects of naloxone on the guinea pig ileum.
mesh_terms: D000227:Adenine Nucleotides / Q000037:antagonists & inhibitors; D000818:Animals; D005221:Fatigue / Q000188:drug therapy; D005769:Gastrointestinal Motility / Q000187:drug effects*; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D066298:In Vitro Techniques; D009020:Morphine / Q000037:antagonists & inhibitors; D009270:Naloxone / Q000494:pharmacology* / Q000627:therapeutic use; D010528:Peristalsis / Q000187:drug effects*; D012018:Reflex / Q000187:drug effects*
chemical_list: D000227:Adenine Nucleotides; D009270:Naloxone; D009020:Morphine