Medical Cannabis in the UK: Laws & Regulations
Medical cannabis in the UK is legal only under strict medical supervision. Since 2018, specialist doctors have been allowed to prescribe cannabis-based products for medicinal use (CBPMs) in limited circumstances. These prescriptions are tightly regulated, and patients must obtain them from licensed pharmacies.
The Legal Framework
Misuse of Drugs Act 1971
Cannabis is classified as a Class B controlled drug under this Act. Possessing, supplying, producing, or importing cannabis without authorisation remains illegal.
Misuse of Drugs Regulations 2001
These regulations create the legal pathway for cannabis-based medicines. An amendment in November 2018 allowed doctors on the General Medical Council’s Specialist Register to prescribe cannabis-based products in certain situations.
MHRA Oversight
The Medicines and Healthcare products Regulatory Agency (MHRA) oversees product safety, ensuring that all prescribed cannabis-based medicines meet regulatory standards.
✅ What is Allowed
- Specialist Prescriptions:
Only doctors on the GMC Specialist Register can prescribe medical cannabis. GPs cannot initiate a prescription. - Specific Conditions:
Typically prescribed when conventional treatments have failed for:- Severe forms of epilepsy
- Spasticity in multiple sclerosis (MS)
- Chemotherapy-induced nausea and vomiting
- Licensed Product Forms:
- Sativex (THC:CBD spray): Approved for MS-related spasticity.
- Epidyolex (CBD solution): Approved for rare epilepsies such as Lennox-Gastaut and Dravet syndrome.
- Other unlicensed cannabis-based products may be prescribed if a specialist believes they could help.
- Legal Possession and Use:
With a valid prescription, patients may legally possess, carry, and use their medication. - Dispensed by Licensed Pharmacies:
Products must be supplied by pharmacies authorised to handle controlled drugs.
❌ What is Not Allowed
- Smoking Cannabis:
Smoking cannabis (including prescribed products) is prohibited. Vaporisation of prescribed flower may be allowed. - GP Prescriptions:
General Practitioners cannot initiate medical cannabis prescriptions, though they may continue care under a specialist’s direction. - Self-Medication:
Using cannabis without a prescription remains illegal. Possession may lead to criminal penalties. - Driving with THC:
The UK enforces a strict drug-driving limit: 2 micrograms of THC per litre of blood. Even with a prescription, drivers may be penalised if found over this threshold or deemed unfit to drive.
NHS vs. Private Access
NHS Prescriptions
- Extremely limited.
- Usually restricted to Epidyolex for rare epilepsies and Sativex for MS spasticity.
- Requires approval through local NHS trusts.
- Many patients face long waits or find they do not meet NHS criteria.
Private Prescriptions
- Widely available through clinics and pharmacies specialising in CBPMs.
- Patients must have a documented medical history showing failure of at least two licensed treatments.
- Initial consultations cost between £150–£250, with monthly medication costs ranging from £100–£300+ depending on the product and dose.
Key Considerations for Patients
- Legal Use Only with Prescription: Any use outside prescribed channels is a criminal offence.
- Travel Restrictions: Rules vary by country — patients should check import laws and may require special permits.
- Driving Risks: Patients with THC prescriptions must take extreme care when driving, as legal limits are very low.
- Clinical Guidelines: The National Institute for Health and Care Excellence (NICE) provides guidance for doctors considering cannabis-based treatments.
Medical cannabis is not freely available in the UK. It can only be prescribed by a GMC-registered specialist and dispensed by licensed pharmacies under strict regulation. While NHS access is rare and highly restricted, private clinics provide a legal pathway for eligible patients whose conditions have not responded to standard treatments.