Nitrous oxide--analgesia or anesthesia.
D000698:Analgesia; D000766:Anesthesia, Dental; D000769:Anesthesia, Inhalation / Q000009:adverse effects / Q000145:classification / Q000266:history; D001463:Barbiturates / Q000008:administration & dosage; D003729:Dental Care; D004358:Drug Therapy; D006801:Humans; D000860:Hypoxia; D009609:Nitrous Oxide / Q000008:administration & dosage* / Q000266:history / Q000494:pharmacology
D001463:Barbiturates; D009609:Nitrous Oxide