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Legality · 4-AcO-DMT

Is 4-AcO-DMT legal in United Kingdom?

Confirmed against a primary sourceVerified July 14, 2026
Legal status
4-AcO-DMT (O-acetylpsilocin) is a Class A controlled drug in the United Kingdom, caught as an ester of psilocin. The Misuse of Drugs Act 1971 Schedule 2 Part I lists psilocin (paragraph 1) and paragraph 3 controls 'any ester or ether' of the listed Class A drugs, so O-acetylpsilocin falls in automatically without being named. It is additionally a prohibited 'psychoactive substance' under the Psychoactive Substances Act 2016.
Consequences if caught
Class A penalties apply: possession up to 7 years plus an unlimited fine; production, supply or importation up to life imprisonment. The PSA 2016 separately criminalises production, supply and import (up to 7 years) but not simple possession.
If prescribed or medical
No medical use; psilocin-class tryptamines sit in MDA Schedule 1, handled only under a Home Office licence for research. 4-AcO-DMT is not prescribable.
Documentation
MDA 1971 Sch 2 Part I — psilocin (para 1) plus the esters/ethers clause (para 3); reinforced by the Psychoactive Substances Act 2016 blanket ban.
Primary source

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

4-AcO-DMT in related jurisdictions

Jurisdictions related to United Kingdom by shared drug statute, shared regulator or constitutional link. Each has its own separately verified status; a relationship is not a shared answer.

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

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 →

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