It's no laughing matter.
D000281:Administration, Intranasal; D000293:Adolescent; D000336:Aerosols; D000818:Animals; D002648:Child; D004335:Drug and Narcotic Control; D006801:Humans; D009609:Nitrous Oxide; D010150:Paint; D019966:Substance-Related Disorders
D000336:Aerosols; D009609:Nitrous Oxide