Likewise, in some medical fields, such as dentistry, nitrous oxide is legally possessed and used as an anesthetic, sometimes in conjunction with other medicines, usually for pain reduction. If dispensed by a licensed physician, its use is, of course, legal.

Finally, there are small charged containers which are sold to the public for use in whipped cream dispensers, since, interestingly, nitrous acts as a presevative and 'inflator' when mixed with chilled whipped cream.

Unlawful Nitrous Oxide possession is addressed by Arizona Law (ARS 13-3403.01 and 13-3403.02), which states in simplest terms that it is illegal to sell, give or receive nitrous charged containers to minors. It appears that sale or possession of nitrous among adults is lawful.

Note, of course, that if a person were to consume any form of nitrous oxide, even if straight from a whipped cream can, and were to become intoxicated to the slightest degree and then drive a car, they could be charged with driving under the influence DUI.