Is HHC legal in United Kingdom?

Legal status

HHC (hexahydrocannabinol) is not individually named in the Misuse of Drugs Act 1971, but it is caught as a psychoactive substance under the blanket Psychoactive Substances Act 2016 — producing, supplying, importing or exporting it is an offence.

Consequences if caught

Production, supply, import and export carry up to 7 years under the PSA 2016; simple possession is an offence only in a custodial institution. Distinct from cannabis, a Class B drug under the MDA 1971 for which possession is an offence in all settings.

If prescribed or medical

No prescription or licensed medical HHC product exists; the PSA 2016 exempts only investigational or licensed medicines, none of which contain HHC.

Documentation

HHC's semi-synthetic (hydrogenated-THC) structure meant it slipped the MDA's 'tetrahydrocannabinols and their isomers' entry, so the UK relies on the 2016 blanket NPS regime rather than a named MDA scheduling. Internationally, the CND placed HHC in Schedule II of the 1971 Psychotropic Convention on 13 March 2025 (in force 6 December 2025) — the first semi-synthetic cannabinoid under international control.

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.