title: Site of action of intrathecal morphine.
mesh_terms: D000773:Anesthesia, Obstetrical; D005260:Female; D006801:Humans; D007278:Injections, Spinal; D009020:Morphine / Q000494:pharmacology*; D011247:Pregnancy; D011957:Receptors, Opioid / Q000187:drug effects; D013116:Spinal Cord / Q000187:drug effects*
chemical_list: D011957:Receptors, Opioid; D009020:Morphine