Not yet medically reviewed, information on this site is in preparation and has not been verified by a medical reviewer.
Legality · Nitrous Oxide

Is Nitrous Oxide legal in South Korea?

Confirmed against a primary sourceVerified July 14, 2026
Legal status
Nitrous oxide is not a narcotic under Korea's drug law but is designated under the Chemical Substances Control Act so that inhaling it for non-medical (hallucinogenic) purposes and supplying it for that purpose are prohibited; medical and legitimate industrial/food use remains lawful.
Consequences if caught
Recreational inhalation or supply carries up to 3 years' imprisonment or a fine up to 50 million won; as a chemical-control (not narcotics) offence it is NOT death-eligible.
If prescribed or medical
Nitrous oxide is a lawful medical/anaesthetic gas and food additive; healthcare and food-industry supply is unaffected.
Documentation
Medical and food-grade nitrous oxide are lawful; canisters supplied or used for inhalation are penalised under the Chemical Substances Control Act.
Primary source

Court records

We have not yet assessed whether court records are publicly available for this jurisdiction.

Nitrous Oxide in related jurisdictions

Other substances confirmed in South Korea