title: Spinal opiate analgesia: characteristics and principles of action.
mesh_terms: D000698:Analgesia; D000758:Anesthesia / Q000009:adverse effects; D000818:Animals; D001341:Autonomic Nervous System / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008614:Meperidine; D009020:Morphine; D009294:Narcotics / Q000378:metabolism / Q000494:pharmacology*; D009475:Neurons, Afferent / Q000187:drug effects; D009619:Nociceptors / Q000187:drug effects; D010146:Pain / Q000503:physiopathology; D011817:Rabbits; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects; D012018:Reflex / Q000187:drug effects; D012131:Respiratory Insufficiency / Q000139:chemically induced; D013116:Spinal Cord / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology
chemical_list: D009294:Narcotics; D011957:Receptors, Opioid; D009020:Morphine; D008614:Meperidine