VISTA, Calif. — A nine-year-old girl died in March from "methemoglobinemia in the setting of recent nitrous oxide administration" following dental surgery in Vista, the Medical Examiner's Office ...

Denver Health is changing how its doctors administer nitrous oxide, a common anesthetic used to sedate people for surgeries, after realizing how much was being wasted. In the process, they're saving ...

A Hartford dentist’s discovery in the 1840s made pain-free surgery possible, though he never received recognition during his lifetime.

Recreational use of nitrous oxide — often referred to as whippets or laughing gas — left a 23-year-old with frostbite in his mouth and throat, according to a report of the man’s case published ...