Is Nitrous Oxide legal in United Kingdom?

Also known as: laughing gas, whippets, nangs

Legal status

Controlled as a Class C drug. Part III of Schedule 2 to the Misuse of Drugs Act 1971 names it at paragraph 1(a) in the entry «Nitrous oxide.», inserted on 8 November 2023 by the Misuse of Drugs Act 1971 (Amendment) Order 2023, S.I. 2023/1091, made on 11 October 2023 by Order in Council under section 2(2); before that date it was not a controlled drug, and section 2(1)(b) of the Act provides that «the expressions “Class A drug”, “Class B drug” and “Class C drug” mean any of the substances and products for the time being specified respectively in Part I, Part II and Part III of that Schedule». Schedule 2 was read as in force on 2 October 2026 in the legislation.gov.uk revised text, which records no known outstanding effects and incorporates S.I. 2024/1361, in force 15 January 2025; Schedule 2 moves by Order in Council under section 2(2), so this does not rule out a later amendment.

Consequences if caught

Capital exposure: none. No provision of the Misuse of Drugs Act 1971, of the Customs and Excise Management Act 1979 or of the Psychoactive Substances Act 2016 provides a death sentence; the highest punishment in Schedule 4 to the 1971 Act is imprisonment for life. Lawful uses are carved out by regulation 4C of the 2001 Regulations, inserted the same day by S.I. 2023/1099: production, supply and offer are lawful except where the person knows, or is reckless as to whether, it is likely to be wrongfully inhaled, and import and export offences are excluded except where the person «intends to wrongfully inhale it; or» knows or is reckless that another will. Regulation 4C(5) defines wrongful inhalation as any inhalation other than for medical or dental purposes. This row is Class C, so the Class C drug involved column of Schedule 4 to the 1971 Act governs. Possession under section 5(2) is an offence only where regulation 4C(4) of the Misuse of Drugs Regulations 2001 does not save it, that is where the holder intends to inhale it wrongfully or to supply it for wrongful inhalation, and then it carries on indictment «2 years or a fine, or both.» Possession with intent to supply, section 5(3), supplying or offering to supply, section 4(3), and production, section 4(2), each carry on indictment «14 years or a fine, or both.» Sale has no offence of its own: selling is supplying under section 4(3), and trafficking is not a separate offence in the Act, being concerned in another person's supply falling under section 4(3)(b) and (c). Importation and exportation are prohibited by section 3(1) and prosecuted as customs offences under sections 50(3), 68(2) and 170(2) of the Customs and Excise Management Act 1979, which Schedule 1 to that Act punishes for this class «on conviction on indictment, to a penalty of any amount, or to imprisonment for a term not exceeding 14 years». Cultivation falls under production, because section 37(1) defines producing as «producing it by manufacture, cultivation or any other method». Use is not itself an offence: the Act reaches the user through possession, and its only offence of use is smoking or otherwise using prepared opium under section 9. An occupier who knowingly permits production or supply on premises commits the section 8 offence, also 14 years on indictment. The Act sets no quantity threshold and no statutory presumption of intent to supply; on indictment the fine has no stated maximum and runs with imprisonment or alone, because every band reads «or a fine, or both». No administrative disposal attaches by statute: the penalty notice table in section 1 of the Criminal Justice and Police Act 2001, which applies in England and Wales, lists possession only of cannabis, cannabinol and its derivatives, and khat. Section 28 gives a defence of lack of knowledge; under section 28(3) a belief that it was a different controlled drug is no defence unless, had it been that drug, no offence would have been committed. The Psychoactive Substances Act 2016 does not reach it: section 2(1) of that Act confines a psychoactive substance to one that «is not an exempted substance (see section 3).» and Schedule 1 exempts «Controlled drugs (within the meaning of the Misuse of Drugs Act 1971).» The 1971 Act is therefore read first and governs alone.

If prescribed or medical

The Misuse of Drugs Regulations 2001 list it at paragraph 11 of Schedule 5, but regulation 4(1) and 4(3)(b) now read «except nitrous oxide», so the general Schedule 5 exemptions do not apply to it; regulation 4C, quoted above, is what makes medical, dental, catering and industrial possession and supply lawful. In Northern Ireland the Misuse of Drugs (Amendment) Regulations (Northern Ireland) 2023, S.R. 2023 No. 180, made the same exceptions from 8 November 2023. On Northern Ireland the sources point two ways, and both are quoted. legislation.gov.uk tags every provision of the 2001 Regulations with the extent E+W+S+N.I. 45 such tags in its XML, while the Regulations themselves carry no extent clause; against that tag, their amending Regulations of 2023 and 2024 each state «These Regulations extend to England and Wales and Scotland.», and the 2026 temporary class drug order applies the two codes separately, saying «The Misuse of Drugs Regulations 2001 apply to the substances and products listed in the Schedule to this Order as if those substances and products were specified in Schedule 1 to those Regulations.» and «The Misuse of Drugs Regulations (Northern Ireland) 2002 apply to the substances and products listed in the Schedule to this Order as if those substances and products were specified in Schedule 1 to those Regulations.» Northern Ireland has its own Misuse of Drugs Regulations (Northern Ireland) 2002, S.R. 2002 No. 1. Because the legislation.gov.uk text of the 2002 Regulations states «There are outstanding changes not yet made by the legislation.gov.uk editorial team to The Misuse of Drugs Regulations (Northern Ireland) 2002.», the Northern Ireland position given above was read from the amending instrument itself and not from that consolidation.

Documentation

A canister of food grade or medical nitrous oxide may be carried and bought for its ordinary purpose; the offence turns on the intent to inhale wrongfully or knowledge of another's intent, not on the canister. The Home Office controlled medicine travel guidance at https://www.gov.uk/travelling-controlled-drugs, read on 2 October 2026, does not address nitrous oxide, and regulation 4C(1) excludes the import offences except where wrongful inhalation is intended or known.

Drug laws and enforcement change and vary within a country. This is not legal advice. Always confirm with United Kingdom’s embassy or official drug authority before traveling; penalties can be severe, including imprisonment.