The Legal Status of Medical Cannabis in the UK
Medical cannabis became legal in the United Kingdom on 1 November 2018, following a change to the Misuse of Drugs Regulations 2001. This allowed specialist doctors on the General Medical Council (GMC) Specialist Register to prescribe Cannabis-Based Medicinal Products (CBPMs) to patients.
Recreational cannabis remains illegal in the UK and is classified as a Class B drug. Possession without a valid prescription can result in up to five years in prison and an unlimited fine.
Who Can Prescribe Medical Cannabis?
Only doctors on the GMC Specialist Register can prescribe CBPMs in the UK. General practitioners (GPs) cannot prescribe medical cannabis, although they may refer patients to specialist clinics. This is why most patients access treatment through private specialist clinics rather than through their GP or the NHS.
NHS vs Private Prescriptions
While medical cannabis is technically available on the NHS, NHS prescriptions remain exceptionally rare. The NHS will only prescribe in very specific circumstances — primarily Epidyolex for certain forms of childhood epilepsy, and Sativex for MS spasticity in Scotland.
The vast majority of patients access medical cannabis through private specialist clinics. Private prescriptions cost between £100–£300 per month for the medication, plus consultation and subscription fees charged by the clinic.
Travelling With Medical Cannabis
This is one of the most misunderstood areas of UK medical cannabis law. Even with a valid UK prescription:
- You cannot take your medication to most other countries, including popular European holiday destinations such as Spain, France, Portugal, and Greece.
- Some countries (e.g. the Netherlands, Germany) may allow travel with cannabis medicine under specific conditions, but this requires advance planning and documentation.
- You should never travel internationally with cannabis medicine without first checking the laws of your destination country and transit countries.
- Within the UK, you may carry your prescribed medicine with the original pharmacy label and a letter from your prescribing doctor.
Your Rights as a Patient
As a medical cannabis patient in the UK you have the right to:
- Request a referral from your GP to a specialist who can assess your eligibility
- Seek a second opinion if you are refused a prescription
- Access your medical records including prescription information
- Receive clear information about your treatment options
Drug Driving
UK law sets very low legal limits for THC in blood when driving. Even patients with a valid medical cannabis prescription can be charged with drug driving if their blood THC levels exceed the legal limit of 2 micrograms per litre of blood. Patients taking THC-containing products should be aware of this risk and discuss driving with their prescribing doctor.
Workplace Drug Testing
A medical cannabis prescription does not protect you from workplace drug testing. Many employers in safety-critical industries (transport, construction, healthcare) conduct drug testing, and a positive result may be grounds for disciplinary action even with a valid prescription. Patients in such roles should speak with their prescribing doctor and employer before starting treatment.