A private prescription is not a workaround for buying cannabis from an unregulated source. It is a clinical decision, made by a suitably qualified prescriber, for a specific patient and condition. For people asking how to get medical cannabis in the UK, that distinction shapes every stage of the process - from the medical records a clinic asks for to what can happen if you drive while impaired.
Medical cannabis has been legal to prescribe in the UK since November 2018, but access remains tightly controlled. Most patients who receive it do so through a private clinic, pay for consultations and medication themselves, and need ongoing reviews to keep their prescription active.
How to get medical cannabis through a UK clinic
The usual route starts with a regulated private medical cannabis clinic. You submit an enquiry and complete a medical questionnaire covering your diagnosis, current symptoms, medicines, previous treatments, mental health history and any substance-use concerns. Clinics will normally ask for a summary of your GP medical record and, where relevant, hospital letters or evidence of specialist care.
The key question is not whether someone simply wants to try cannabis. A prescriber must decide whether a cannabis-based medicine may be clinically appropriate after considering the condition, the evidence, previous treatment response and possible risks. Many clinics expect applicants to have tried at least two conventional treatment options for the condition in question, or to have a clear reason why those options were unsuitable. This is common private-clinic practice rather than a legal qualifying rule.
There is no official list of conditions that automatically entitles a person to a prescription. Chronic pain, anxiety disorders, post-traumatic stress disorder, sleep problems, migraine and neurological conditions are among the reasons patients may seek an assessment. Eligibility varies considerably. A diagnosis alone does not guarantee a prescription, and clinicians may decline treatment where the risks outweigh the likely benefit.
If the clinic accepts the initial information, the next step is a consultation with a doctor on the General Medical Council specialist register, or another doctor working under the required specialist oversight. This appointment should be an opportunity for a proper discussion, not a box-ticking exercise. Expect questions about symptom severity, daily functioning, previous medicines, alcohol and drug use, pregnancy plans, cardiovascular history, and personal or family history of psychosis or bipolar disorder.
Be frank. Withholding information about previous cannabis use, adverse reactions or psychiatric history can make treatment less safe and may lead to a prescription being stopped later. A responsible clinician should explain the limits of the evidence as well as potential benefits.
What a private prescription may include
If treatment is approved, the prescriber selects a cannabis-based product and writes a private prescription. This may be a dried cannabis flower product intended for vaporisation, an oil taken orally, capsules, or another formulation. The product is then dispensed by a pharmacy that handles controlled drugs and sent to the patient or made available for collection.
The right formulation depends on the clinical aim and the patient. Oils can offer more predictable dosing and avoid inhalation, but their effects often take longer to appear and can last for several hours. Vaporised flower has a faster onset, which some patients find useful for fluctuating symptoms, but it is not risk-free and can be less convenient in public. Smoking prescribed cannabis remains unlawful and is not the approved method of administration.
A prescription might contain THC, CBD or both. CBD sold on the high street is not equivalent to prescribed medical cannabis: retail CBD products are generally not licensed medicines, may contain very low cannabinoid levels, and are not a substitute for clinical assessment. Equally, a legal prescription does not mean a product will work for every symptom or that higher THC is inherently better.
NHS access is possible, but rare
Cannabis-based medicines can be prescribed on the NHS, but routine access is limited. Current NHS prescribing is concentrated in a small number of licensed medicines and narrow clinical indications, including severe treatment-resistant epilepsy, chemotherapy-induced nausea and vomiting, and spasticity associated with multiple sclerosis.
For unlicensed cannabis-based products, NHS prescribing is generally confined to specialist circumstances and is uncommon. A GP cannot independently start a prescription for an unlicensed medical cannabis product. They may be involved in a patient’s wider care, and in some cases shared-care arrangements are discussed, but these arrangements are not automatic and many GP practices will not take on prescribing responsibility.
Patients should be wary of any service that suggests it can guarantee NHS-funded cannabis or promises approval before reviewing records. Clinical eligibility and funding are separate questions.
Costs, follow-ups and the commitment involved
Private medical cannabis is an ongoing expense rather than a one-off consultation. Charges usually include an initial appointment, follow-up reviews and the cost of the medication itself. Costs vary with the clinic, product type, prescribed amount and how often a patient needs to be reviewed. Some services charge membership-style fees, while others bill each appointment separately.
Before booking, ask for a clear price schedule covering the first consultation, repeat prescriptions, mandatory reviews, pharmacy dispensing and delivery. It is also sensible to ask what happens if the first product is ineffective or causes side effects. Changing products may require another prescription and can alter the monthly cost.
Follow-up appointments are a safety requirement, not an administrative nuisance. The prescriber should review symptom changes, side effects, dose, sleep, mood, functioning and any issues with dependence or tolerance. Do not adjust the dose beyond the written directions without speaking to the clinic.
Keep proof of your prescription
A valid prescription provides a lawful basis to possess the medicine supplied to you, but it does not remove every practical difficulty. Keep the product in its original pharmacy packaging with the dispensing label attached. Carry a copy of your prescription or clinic letter, particularly when travelling within the UK or if you need to explain the medicine to an employer, venue or police officer.
Do not share prescribed cannabis with anyone else. Supplying it to another person is illegal, even where the product was lawfully prescribed to you. Do not buy additional cannabis from an unregulated seller to supplement your prescription. Aside from the legal risk, unregulated products may be contaminated, inaccurately labelled or far stronger than expected.
Driving needs particular care
Medical cannabis does not give patients a blanket right to drive after taking THC. UK drug-driving law sets legal blood limits for several controlled drugs, including THC. A patient may have a potential medical defence where the medicine was prescribed or supplied for medical or dental purposes, it was taken in accordance with directions, and the person was not impaired.
That is not the same as immunity from arrest, roadside testing or investigation. Police can act where they suspect impaired driving, and a positive roadside drug wipe can lead to further tests. THC can remain detectable long after a patient feels the immediate effects have worn off.
The practical advice is cautious: follow the prescriber’s guidance, do not drive if you feel drowsy, slowed, dizzy or otherwise impaired, and discuss driving explicitly at your appointment. Your insurer should also be told where its policy requires disclosure of prescribed medication or a relevant medical condition. A prescription label is useful evidence, but it cannot make impaired driving lawful.
Questions to ask before choosing a clinic
The clinic should be open about who will assess you, what records it needs, how much treatment costs and how it manages adverse effects. Ask whether the doctor is appropriately registered, whether the pharmacy is UK-based, how often reviews are required, and whether the service has a clear complaints process.
It is reasonable to ask why a particular product is being recommended, what dose you will start on, how long a trial should last and what success would look like. A good clinic will not present cannabis as a cure-all. It will set realistic goals, such as improved sleep continuity, fewer pain flares or better ability to complete daily tasks, then review whether those goals are actually being met.
When medical cannabis may not be the right route
A prescriber may advise against treatment because of pregnancy or breastfeeding, a history of psychosis, poorly controlled cardiovascular disease, problematic substance use, interactions with other medicines, or concerns about driving and safety-sensitive work. These decisions can feel disappointing, particularly for people who have exhausted other options. They are nevertheless part of responsible prescribing.
If you are declined, ask for the clinical reasons and whether there are treatments or referrals worth pursuing through your GP or existing specialist. A refusal from one clinic should not be treated as proof that you have no options, but repeatedly seeking a prescriber willing to ignore clear risks is unlikely to lead to safe care.
For most prospective patients, the sensible first move is to gather accurate medical records and approach the assessment as a conversation about treatment goals, safety and cost. Medical cannabis can be a legitimate option for some people, but the strongest protection is not a promotional promise - it is a careful prescription, clear documentation and a clinician prepared to say no when the evidence or circumstances do not support it.
