Is Mephedrone (4-MMC) legal in United Kingdom?
- Legal status
- Controlled — GENERIC (the archetypal case). Mephedrone is never individually named; it is caught by the world-first generic cathinone definition inserted into Class B of the Misuse of Drugs Act 1971 (Sch 2 Pt 2) by the MDA 1971 (Amendment) Order 2010 — import ban 29 Mar 2010, full control eff. 16 Apr 2010; Schedule 1 (no medicinal use) under the Misuse of Drugs Regulations 2001. The blanket Psychoactive Substances Act 2016 also exists but is superseded here by the MDA cathinone generic.
- Consequences if caught
- Class B / Schedule 1: unauthorised possession up to 5 years, supply/production up to 14 years plus unlimited fine. No death penalty in the UK.
- If prescribed or medical
- Schedule 1 controlled drug with no recognised medical use and no lawful prescription route; possession lawful only under a Home Office research licence.
- Documentation
- No licit personal-carry or import route for a Class B / Schedule 1 controlled drug; travellers cannot bring mephedrone in under any prescription cover.
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
Verify current rules with the destination country’s official drug authority and your own country’s embassy before traveling. Find the destination’s U.S. embassy & official country guidance →
Non-U.S. travelers: check your own government’s travel advisory and embassy.
If you’re detained or arrested abroad
Contact your own country’s embassy or consulate in the destination immediately — not the destination’s authorities. U.S. citizens: contact the nearest U.S. embassy/consulate and the U.S. State Department at +1-202-501-4444 (from abroad). If a U.S. citizen is arrested or detained abroad →