Is Medical Cannabis Legal?

Medically reviewed: May 2026 | Sources: GOV.UK, MHRA, Home Office, NICE

For a complete overview of medical cannabis access in the UK, read our medical cannabis UK guide.

One of the most frequent questions from UK patients and healthcare professionals alike concerns the legal status of medical cannabis. In short: yes, medical cannabis is legal in the United Kingdom when prescribed by a qualified specialist consultant. However, the legal landscape is more nuanced than a simple yes or no. This guide explains the full legal framework governing cannabis-based medicines in the UK in 2026.

The Legal Status: Rescheduled in 2018

Prior to November 2018, cannabis was classified as a Schedule 1 controlled substance under the Misuse of Drugs Regulations 2001 — meaning it had no recognised medicinal value and could not be prescribed. On 1 November 2018, the UK Government amended the regulations to move cannabis-based products for medicinal use in humans (CBPMs) to Schedule 2, making them legally prescribable for the first time.

This followed significant public pressure, including the high-profile cases of Billy Caldwell and Alfie Dingley — two children with severe epilepsy whose families campaigned for access to cannabis-based medicines after conventional treatments failed.

The rescheduling was a decision made by the Home Secretary, following a recommendation from the Advisory Council on the Misuse of Drugs (ACMD) and the Chief Medical Officer. The MHRA (Medicines and Healthcare products Regulatory Agency) retains oversight of cannabis-based medicines as prescription-only medicines (POMs).

What Changed and What Did Not

The 2018 rescheduling changed specific things — and left others unchanged. Understanding both is essential for UK patients.

What changed:

• GMC-registered specialist consultants may now legally prescribe cannabis-based medicines
• Licensed specialist pharmacies may legally dispense CBPMs
• Patients with a valid prescription may legally possess their prescribed cannabis-based medicine
• Pharmaceutical-grade cannabis can now be legally imported under MHRA import licences

What did not change:

• Cannabis remains a Class B controlled substance under the Misuse of Drugs Act 1971 for all recreational and non-prescribed purposes
• Personal possession without a prescription remains illegal and carries penalties of up to 5 years imprisonment plus an unlimited fine
• Supply or production without authorisation remains a serious criminal offence (up to 14 years)
• GPs are still not permitted to initiate medical cannabis prescriptions — only specialist consultants may do so
• NHS prescriptions for medical cannabis remain extremely rare and limited to specific conditions

Who Can Prescribe Legally?

Legal prescribing of cannabis-based medicines in the UK is restricted to GMC-registered specialist consultants. The relevant specialties include Pain Medicine, Psychiatry, Neurology, Oncology, and Palliative Medicine.

GPs may support patients by providing medical records and documenting treatment history, but they cannot initiate a CBPM prescription. This restriction was deliberately retained by the Government as a safeguard — ensuring that only clinicians with appropriate specialist knowledge are responsible for prescribing decisions.

Private cannabis clinics operate legally within this framework by employing GMC-registered consultants in the relevant specialties. They are subject to CQC (Care Quality Commission) oversight and must comply with all applicable prescribing regulations.

Is CBD Legal in the UK?

This distinction is important, particularly for SEO and patient information purposes — CBD and medical cannabis are frequently conflated, but they are legally and clinically distinct products.

CBD (cannabidiol) as a food supplement is legal to buy and sell in the UK, provided the product:

• Contains less than 0.2% THC (or less than 1mg THC per container in some interpretations)
• Is derived from an EU-approved industrial hemp variety
• Is sold as a food supplement and does not make medicinal claims
• Complies with FSA (Food Standards Agency) novel food regulations (valid novel food application required since March 2021)

Prescription-grade CBD medicines (such as Epidyolex, a purified CBD oral solution) are prescription-only medicines regulated by the MHRA. They are entirely different from OTC CBD supplements and are prescribed exclusively through specialist consultants.

THC-containing cannabis-based medicines remain Schedule 2 controlled drugs and require a specialist prescription under all circumstances.

The Future of Cannabis Law in the UK

Reform discussions continue in 2026. The Labour Government, which came to power in July 2024, has signalled limited appetite for further liberalisation of cannabis laws in the short term. However, several developments are influencing the direction of policy:

• The Home Affairs Select Committee has continued to call for a review of drug policy, including medical cannabis access barriers
• The All-Party Parliamentary Group (APPG) on Medical Cannabis under Prescription continues to advocate for wider NHS access and improved patient pathways
• The MHRA is engaged in ongoing work to develop a licensing pathway that could allow more cannabis-based medicines to receive full marketing authorisations, potentially reducing reliance on unlicensed product prescribing
• Scotland, Wales, and Northern Ireland each have devolved health responsibilities but are bound by the same UK-wide controlled drugs legislation

It is important to note that while reform discussions are ongoing, the fundamental legal framework is unlikely to change significantly in the near term. The current Schedule 2 system for CBPMs remains in place.

What UK Patients Are Protected By

UK patients with a valid medical cannabis prescription are protected by law. Specifically:

• Possession of a prescribed CBPM is legal — you cannot be arrested for possessing your prescribed medicine in its original pharmacy packaging
• Your prescribing specialist’s details must appear on the prescription, providing legal documentation of the authorised treatment
• You are entitled to carry your prescription and clinic correspondence as supporting documentation

Important limitation: UK prescriptions do not provide legal protection outside the UK. Cannabis remains illegal in the majority of countries. Attempting to travel abroad with a prescribed cannabis-based medicine is illegal in most jurisdictions and is strongly discouraged without expert legal advice.

Frequently Asked Questions

1. Is medical cannabis legal in the UK in 2026?
Yes. Medical cannabis was rescheduled to Schedule 2 in November 2018 and remains legally prescribable by GMC-registered specialist consultants.

2. Can I be arrested for carrying my prescription?
No, provided the medication is in its original pharmacy packaging, you carry the prescription letter, and the product matches what is prescribed. Police may examine the documentation, but possession of a prescribed CBPM is legal.

3. Is recreational cannabis legal in the UK?
No. Recreational cannabis remains a Class B controlled substance. Personal possession carries penalties of up to 5 years’ imprisonment plus an unlimited fine.

4. Can I grow my own cannabis for medical use?
No. Cultivation of cannabis for any purpose — including personal medical use — is illegal in the UK without a specific Home Office licence. These licences are issued to authorised pharmaceutical producers only, not to individuals.

5. Is CBD from a shop the same as medical cannabis?
No. OTC CBD products are food supplements regulated by the FSA. Prescription-grade cannabis-based medicines are MHRA-regulated pharmaceutical products containing specific doses of cannabinoids. They are legally, clinically, and qualitatively different.

6. Does a GP have to agree for me to get a prescription?
No. You can self-refer to a private cannabis clinic without your GP’s agreement. However, you will need your medical records, which your GP surgery is legally required to provide on request.