title: Sites of acute morphine tolerance in intestine.
mesh_terms: D000818:Animals; D001626:Bethanechol Compounds / Q000494:pharmacology; D004246:Dimethylphenylpiperazinium Iodide / Q000494:pharmacology; D004285:Dogs; D004347:Drug Interactions; D004361:Drug Tolerance; D005260:Female; D066298:In Vitro Techniques; D007421:Intestine, Small / Q000187:drug effects; D007422:Intestines / Q000187:drug effects*; D007981:Levorphanol / Q000494:pharmacology; D008297:Male; D009020:Morphine / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009270:Naloxone / Q000494:pharmacology; D010477:Perfusion; D011955:Receptors, Drug / Q000187:drug effects*; D012701:Serotonin / Q000494:pharmacology
chemical_list: D001626:Bethanechol Compounds; D011955:Receptors, Drug; D007981:Levorphanol; D012701:Serotonin; D009270:Naloxone; D004246:Dimethylphenylpiperazinium Iodide; D009020:Morphine