title: The possibility that nitrous oxide at analgesic concentrations is an opiate receptor agonist.
mesh_terms: D002491:Central Nervous System Agents; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage / Q000494:pharmacology*; D011957:Receptors, Opioid / Q000187:drug effects*
chemical_list: D002491:Central Nervous System Agents; D011957:Receptors, Opioid; D009609:Nitrous Oxide