Is Medical Cannabis Legal in the UK? What Patients Need to Know
Is Medical Cannabis Legal in the UK? What Patients Need to Know
Yes. Medical cannabis can be legally prescribed in the UK, but only through a tightly controlled medical route. The law changed on 1 November 2018 so that qualifying cannabis based products for medicinal use could be prescribed by appropriately qualified specialist doctors.
This did not legalise recreational cannabis. It did not make cannabis bought online, obtained from another person or grown at home lawful. A person must have a valid prescription for the specific medicine supplied to them and must use it according to the clinical directions.
Most cannabis based products prescribed in this area are controlled drugs and many are unlicensed medicines. This means specialist assessment, careful prescribing, pharmacy dispensing and ongoing monitoring are important parts of lawful access.
At Keltoi Wellness, Dr Waqar Ahmed does not prescribe medical cannabis. He may carry out an initial doctor led review and refer an appropriate patient to Wellford for specialist assessment. Wellford is responsible for deciding whether to prescribe and for the ongoing medical cannabis care of any patient it accepts.
The short answer
Medical cannabis is legal in the UK when:
the product falls within the legal medicinal framework
it has been lawfully prescribed by an authorised healthcare professional
it has been dispensed by a legitimate pharmacy
it belongs to the person named on the dispensing label
it is possessed and used in line with the prescription
It is not lawful simply because someone describes a product as medical, uses it for symptoms or bought it from a website that looks professional.
What changed in 2018?
Before November 2018, cannabis based products generally sat within the strictest controlled drug category and could not normally be prescribed.
The law created a defined category for cannabis based products for medicinal use in humans and moved qualifying products into Schedule 2 of the relevant controlled drug regulations. This established a legal route for specialist prescribing without requiring an individual Home Office or Northern Ireland Department of Health possession licence for each patient.
The change applied across the UK. Northern Ireland introduced matching arrangements on the same date, allowing specialist doctors to prescribe for patients with an unmet clinical need on the same general terms as elsewhere in the UK.
The wider law on cannabis did not disappear. Cannabis remains a controlled Class B drug, and unauthorised possession, cultivation and supply remain criminal offences.
What counts as a cannabis based product for medicinal use?
The legal definition has three broad elements. The product must:
contain cannabis, cannabis resin, cannabinol or a cannabinol derivative
be produced for medicinal use in humans
be regulated as a medicinal product or an ingredient of a medicinal product
Not every oil, edible, flower or product advertised online meets this definition. A seller calling something medicinal does not make it a legal medicine.
The law also keeps smoking prohibited. A patient must use a prescribed product exactly as directed. A prescription for one item does not authorise possession or use of another form of cannabis.
Who can prescribe medical cannabis in the UK?
For an unlicensed cannabis based product, the initial prescription must be made by a doctor included on the General Medical Council Specialist Register. NICE states that the specialist should also have a special interest in the condition being treated.
The specialist must work within their competence and consider the available evidence, previous treatment, licensed alternatives, potential benefits, risks, medicine interactions and the patient's individual circumstances.
After an initial specialist prescription, another prescriber may sometimes issue subsequent prescriptions under a properly agreed shared care arrangement and the direction of the initiating specialist. This is not automatic, and a GP is not required to accept shared care.
For patients in Northern Ireland, the same core restriction applies. Cannabis based products for medicinal use are not generally initiated by a GP.
Does a private doctor follow different legal rules?
No. A private specialist doctor can prescribe when legally and clinically appropriate, but private payment does not remove the prescribing restrictions or professional responsibilities.
The doctor must still be on the relevant Specialist Register for an unlicensed cannabis based product, practise within their area of competence and have enough reliable information to make a safe decision. A private consultation does not guarantee a prescription.
Private and NHS access routes differ in funding, service capacity and clinical governance, but both operate within UK medicines and controlled drug law.
Why are many prescribed products described as unlicensed?
An unlicensed medicine has not received a UK marketing authorisation for routine sale in the same way as a licensed medicine. This does not automatically mean it is illegal or has no clinical use.
Doctors can prescribe some unlicensed medicines when they judge that a patient has a special clinical need that cannot be met by a suitable licensed option. The prescriber takes responsibility for explaining the position, considering the evidence and monitoring safety.
The evidence supporting cannabis based products varies considerably by product, condition and outcome. Legal availability should not be confused with proof that every product works for every symptom.
Is medical cannabis available through the NHS?
NHS prescribing is legal but remains uncommon. National guidance supports the use of particular cannabis based medicines in a limited number of clinical circumstances, and decisions are normally made through specialist services.
The NHS route may involve strict clinical criteria, specialist review and local governance arrangements. A GP can discuss symptoms, current treatment and whether a specialist referral is appropriate, but a request for medical cannabis does not create a right to a prescription or referral.
Private assessment may be available outside the NHS, but the same basic principle applies: a specialist must decide whether treatment is clinically justified and lawful.
Is medical cannabis the same as CBD oil?
No. The term CBD is used for very different products.
Some CBD oils are sold as food supplements through shops and websites. They are not the same as a medicine prescribed and dispensed for a named patient. The NHS warns that the quality and contents of products bought online may be uncertain, and claims of health benefit may not be supported by reliable evidence.
A shop bought CBD product does not provide proof that someone is a medical cannabis patient. It also does not authorise possession of controlled levels of other cannabis compounds.
Anyone using supplements should tell their doctor and pharmacist. CBD can interact with medicines and may affect liver function in some circumstances.
Can you legally buy medical cannabis online?
Online consultations and pharmacy delivery can form part of a lawful service, but the medicine itself cannot be legally supplied without the necessary specialist assessment and prescription.
Warning signs of an unregulated seller include:
no named specialist prescriber
no meaningful clinical assessment
a promise that everyone will be approved
supply through social media or private messages
no registered pharmacy
products without a patient specific dispensing label
requests for unusual or untraceable payment methods
claims that a product can treat many unrelated conditions
Do not assume that professional packaging, laboratory documents or a UK website address prove legality. Check the prescriber on the relevant professional register and the dispensing pharmacy with the General Pharmaceutical Council or Pharmaceutical Society of Northern Ireland.
How can a patient prove that the medicine is prescribed?
The NHS and Northern Ireland guidance recommend keeping the medicine in its original pharmacy packaging with the dispensing label attached.
It is also sensible to retain:
a copy of the prescription
a letter from the prescribing clinician, if provided
photo identification matching the patient details
contact information for the prescribing clinic and pharmacy
The label should identify the patient and provide instructions for use. Moving the medicine into an unlabelled container can make it much harder to demonstrate that it was lawfully supplied.
Documents do not guarantee that every interaction with police, security staff or an employer will be resolved immediately. If legal advice is needed, speak to a qualified solicitor rather than relying on a card or an online forum.
Can a prescription be shared with another person?
No. A prescription is personal to the named patient. Giving, selling or sharing a controlled medicine with another person may amount to unlawful supply and could cause serious harm.
Store the medicine securely, keep it away from children and do not allow anybody else to use it. Contact the dispensing pharmacy or clinic for advice about unwanted or expired medicine rather than disposing of it through household waste.
Is it legal to smoke prescribed cannabis?
No. The 2018 regulations continued the prohibition on smoking cannabis and cannabis based products for medicinal use.
A patient must follow the method and instructions provided by the specialist and pharmacy. Using a prescribed product in a different way can affect safety and may undermine any legal protection linked to following the prescription.
Can you drive with a medical cannabis prescription?
A valid prescription does not make impaired driving lawful.
In England, Scotland and Wales, it is an offence to drive while unfit because of drugs. The law contains provisions relating to prescribed medicines, but they do not protect someone who drives while impaired or who has not followed clinical directions.
Northern Ireland has a separate road traffic framework. It is an offence to drive while impaired through drugs, including prescription medicines.
Before driving, ask the specialist or pharmacist how the medicine may affect alertness, coordination and reaction time. Do not drive if you feel sleepy, dizzy, confused, slowed or otherwise impaired. Alcohol and other medicines may increase impairment.
Anyone who needs advice about their individual legal position should consult a solicitor. Clinical advice and proof of prescription are important, but they do not replace the driver's responsibility to be safe.
Can you travel with prescribed medical cannabis?
The law in the UK does not determine what another country will allow. Some destinations prohibit cannabis based medicines even when the traveller has a UK prescription.
Before travelling abroad:
ask the prescribing clinician and pharmacist whether the medicine is a controlled drug
contact the embassy or official authority for every destination and transit country
check whether a licence or advance permission is required
allow enough time for documents and decisions
carry proof that the medicine was prescribed to you
keep it in the original labelled packaging
follow official guidance about hand luggage and quantity limits
Do not rely on a travel forum, airline employee or another patient's experience. Rules can change and may differ between transit and destination countries. The UK Government warns that a traveller can face seizure, a fine or imprisonment if a medicine is illegal in another country.
Does a prescription make recreational cannabis legal?
No. A prescription only covers the medicine supplied for the named patient and used as directed.
It does not authorise:
home cultivation
possession of cannabis from another source
buying from a recreational market
sharing or selling medicine
smoking cannabis
driving while impaired
importing products without following controlled drug rules
The distinction is important. Medical use is a regulated healthcare pathway, not a general exemption from controlled drug law.
What should happen before a specialist prescribing decision?
A specialist assessment may consider:
the diagnosis and symptoms being addressed
previous and current treatment
relevant medical and mental health history
current prescriptions, supplements and substance use
possible interactions and contraindications
pregnancy and breastfeeding where relevant
the quality of the supporting medical records
the available evidence and recognised guidance
the potential benefits, risks and monitoring needs
safeguarding and the risk of misuse or diversion
The specialist may need GP records, test results or information from another treating clinician. A questionnaire alone should not guarantee treatment.
If treatment is prescribed, the patient should understand how to use it, what side effects to report, whether driving is safe, how follow up works and how the specialist will decide whether to continue or stop.
How the Keltoi and Wellford pathway works
Keltoi Wellness provides a doctor led initial review and referral pathway. It is not the specialist medical cannabis prescriber.
The general process is:
The patient provides identity and relevant health information through the Keltoi process.
Dr Waqar Ahmed reviews the information and speaks with the patient.
Dr Ahmed decides whether a referral for specialist assessment may be appropriate.
If a referral is made, Wellford carries out its own specialist assessment.
Wellford decides independently whether any prescription is clinically and legally appropriate.
If Wellford accepts the patient for treatment, it assumes responsibility for specialist prescribing and ongoing medical cannabis care.
Dr Ahmed does not prescribe medical cannabis and cannot promise that Wellford will accept a referral or issue a prescription. Wellford's clinicians make their own decisions and may request records, further information or decline treatment.
Dr Ahmed remains available within Keltoi's own role if the patient needs appropriate support, but he does not direct or control Wellford's specialist prescribing decision.
What happens if the specialist decides not to prescribe?
A specialist may decide that the evidence is insufficient, another treatment should be considered first, the risks are too high, records are incomplete or the person's needs fall outside the specialist's competence.
That decision should be explained, with appropriate advice about other care or follow up. Paying for an assessment or receiving a referral does not guarantee treatment.
A person should not respond to a refusal by seeking unregulated cannabis online. Doing so may expose them to criminal penalties, unknown ingredients, contamination and unsafe medicine interactions.
A legal route with strict boundaries
Medical cannabis has been legally available through specialist prescription in the UK since November 2018. The key phrase is through specialist prescription.
The legal route depends on an appropriate product, an authorised prescriber, individual clinical assessment, registered pharmacy dispensing and use by the named patient according to directions. It does not extend to recreational products, social media sellers, sharing, smoking, home cultivation or impaired driving.
Patients should keep their labelled packaging and supporting documents, follow clinical instructions and obtain current official advice before travelling. Anyone uncertain about possession, employment, driving or another legal issue should seek qualified legal advice.
Frequently asked questions
Is medical cannabis legal everywhere in the UK?
Yes. A lawful specialist prescription route exists in England, Scotland, Wales and Northern Ireland. Access arrangements may differ, but unauthorised possession and supply remain illegal throughout the UK.
Has medical cannabis been legal since 2018?
Yes. The relevant law changed on 1 November 2018. Qualifying cannabis based products for medicinal use could then be prescribed in controlled circumstances by specialist doctors.
Can my GP prescribe medical cannabis?
The initial prescription of an unlicensed cannabis based product must be made by a doctor on the GMC Specialist Register. Subsequent prescribing may sometimes occur through a formal shared care arrangement under the specialist's direction, but this is not automatic and a GP is not required to accept it.
Does Keltoi prescribe medical cannabis?
No. Dr Waqar Ahmed may provide an initial review and, when appropriate, refer a patient to Wellford. Wellford is responsible for specialist assessment, any prescribing decision and ongoing medical cannabis care.
Does a referral from Keltoi guarantee a Wellford prescription?
No. A referral only enables specialist assessment. Wellford makes an independent decision and may request further information, recommend another approach or decide not to prescribe.
Can I carry prescribed medical cannabis in public?
The named patient may possess medicine that has been lawfully prescribed and dispensed to them, subject to using and carrying it lawfully. Keep it in its original labelled packaging and retain proof of prescription and matching identification.
Is a medical cannabis card enough proof?
A privately issued card is not a prescription. Official patient guidance recommends the original dispensing label, a prescription or clinician letter and matching identification. Seek legal advice for a specific dispute.
Can I buy the same product elsewhere after receiving a prescription?
No. The prescription applies to the medicine lawfully dispensed through the regulated supply route. It does not authorise buying cannabis from another seller or source.
Can I smoke medical cannabis if it is prescribed?
No. Smoking cannabis and cannabis based products for medicinal use remains prohibited. Follow the exact administration instructions supplied by the specialist and pharmacy.
Can I drive after using prescribed medical cannabis?
Do not drive if impaired. Follow the advice of the specialist and pharmacist, read the dispensing information and remember that driving laws differ between Great Britain and Northern Ireland. A prescription is not permission to drive unsafely.
Can I take prescribed medical cannabis abroad?
Only if the destination and any transit countries permit it and all relevant requirements are met. Check with official authorities and embassies well before travel. Keep the medicine in your hand luggage where UK guidance requires, with labelled packaging and proof of prescription.
Is shop bought CBD oil medical cannabis?
No. A food supplement bought in a shop is not the same as a medicine prescribed and dispensed for a named patient. Product content and quality may vary, and CBD may interact with medicines.
Sources and further reading
NHS: Medical cannabis and cannabis oils
NHS England: Cannabis based products for medicinal use
GMC: Information for doctors on cannabis based products for medicinal use
NICE: Cannabis based medicinal products, NG144
UK Government: Rescheduling of cannabis based products for medicinal use
Northern Ireland Department of Health: Cannabis based medicinal products available in Northern Ireland
nidirect: Medicinal cannabis
UK Government: Travelling with medicine containing controlled drugs
UK Government: Drugs and driving, the law
nidirect: Drug driving
ASA and CAP: Prescription only medicines and the Code
Last updated: August 2026
Disclaimer: This article provides general information and is not legal or medical advice. Laws, travel rules and clinical guidance can change. A referral or consultation does not guarantee treatment or a prescription. Speak to an appropriately qualified healthcare professional about treatment and a solicitor about individual legal questions.