Is 3-MMC legal in United Kingdom?
- Legal status
- 3-MMC (3-methylmethcathinone) is a controlled Class B drug, caught by the ring-substituted cathinone generic definition in the Misuse of Drugs Act 1971 (Class B, eff. 16 Apr 2010) — the same 2010 generic that captured mephedrone reaches the 3-isomer, so the UK never needed a dedicated 3-MMC amendment; the Psychoactive Substances Act 2016 is a blanket backstop.
- Consequences if caught
- Class B: possession up to 5 years plus a fine; supply/production up to 14 years and an unlimited fine. Non-death-penalty jurisdiction.
- If prescribed or medical
- No recognised medical use and no lawful prescription route; 3-MMC is a controlled NPS, not a licensed medicine.
- Documentation
- No lawful personal-import route for a controlled Class B substance; carrying it through UK customs is an offence.
Court records
We have applied to The National Archives for the licence required to analyse Find Case Law records, and will publish outcomes once it is determined.
Source checked Find Case Law, The National Archives · 2026-08-26
3-MMC in related jurisdictions
Other substances confirmed in United Kingdom
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.
Before you travel
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If you’re detained or arrested abroad
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