一氧化二氮
Nitrous oxide is a dissociative inhalant that can cause depersonalisation, derealisation (feeling like the world is not real), dizziness, euphoria, and some sound distortion (flanging). In some cases, it may cause slight hallucinations and have a mild aphrodisiac effect. While medical grade nitrous oxide is only available to dentists and other licensed health care providers, recreational users often obtain the drug by inhaling the nitrous oxide used in whipped cream aerosol cans. Nitrous oxide users also buy small "whippet" canisters of nitrous oxide intended for use in restaurant whipped cream dispensers and then "crack" open these canisters to inhale the gas. Users typically transfer the gas to a plastic bag or balloon prior to inhaling it.