title: Central sites of action of gastrointestinal drugs.
mesh_terms: D000818:Animals; D001665:Binding Sites; D001921:Brain / Q000187:drug effects*; D004064:Digestive System / Q000187:drug effects*; D004594:Electrophysiology; D005769:Gastrointestinal Motility / Q000187:drug effects; D006801:Humans; D009020:Morphine / Q000378:metabolism / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology*; D010179:Pancreas / Q000378:metabolism*; D011957:Receptors, Opioid; D013973:Thyrotropin-Releasing Hormone / Q000494:pharmacology
chemical_list: D009294:Narcotics; D011957:Receptors, Opioid; D013973:Thyrotropin-Releasing Hormone; D009020:Morphine