Can you get medical cannabis for arthritis pain in the UK?

Arthritis pain — from osteoarthritis, rheumatoid arthritis and other inflammatory joint disease — is among the conditions UK private specialists assess. The critical distinction is between treating pain and treating the disease: a cannabis-based medicine does not replace the drugs that protect your joints.

Is arthritis pain treated with medical cannabis in the UK?

Arthritis-related pain is assessed by private specialists, typically where pain persists despite proper treatment of the underlying arthritis and where the standard analgesic options have been exhausted or are unsuitable. It is not an NHS treatment for arthritis and is not licensed for it.

Two things need separating. Rheumatoid arthritis and other inflammatory arthritis are driven by an immune process that damages joints over time, and are treated with disease-modifying drugs and biologics that change the course of the disease. Osteoarthritis is a wear-related condition managed with exercise, weight management, physiotherapy, analgesia and sometimes surgery. In both, a cannabis-based medicine is only ever a candidate for symptom relief.

If you have inflammatory arthritis, a specialist will expect you to remain under rheumatology care and to continue your disease-modifying treatment. Stopping it to try something else risks irreversible joint damage.

What the evidence actually shows

The controlled evidence for arthritis is one small early trial, now two decades old, plus indirect evidence from broader chronic pain research. It is a thin base on which to build expectations.

A randomised, double-blind, parallel-group study in Rheumatology gave a THC:CBD oromucosal spray or placebo to 58 patients with rheumatoid arthritis over five weeks. It reported statistically significant improvements in pain on movement, pain at rest, morning stiffness and sleep quality compared with placebo. It was a preliminary study, small, short, and never followed by the large confirmatory trials that would normally be required before a treatment enters routine practice.

For osteoarthritis specifically, controlled evidence is weaker still. Where UK patients with arthritis-related pain are prescribed privately, the rationale is usually drawn from the chronic pain literature rather than from arthritis-specific trials.

What a specialist will want to see

There is no UK list of qualifying conditions, so nothing here entitles you to a prescription. A specialist works through your history and decides whether a monitored trial is justified for you. For arthritis-related pain they will typically look at:

• Which type of arthritis you have, and whether it is confirmed by a rheumatologist
• Whether inflammatory arthritis is adequately controlled on disease-modifying treatment
• What analgesia you have tried — including whether NSAIDs are unsuitable for you and why
• Whether joint replacement or other surgical options have been considered
• How much of your problem is pain, stiffness, sleep disruption or reduced function
• Your other medicines, other conditions, and your personal and family history of psychosis

The general requirements — age, a documented diagnosis, the convention that two standard treatments have been tried, and access to your medical records — are covered in What are the requirements?

Risks and reasons a specialist may say no

The clearest risk in arthritis is not a side effect: it is the temptation to substitute a symptom treatment for disease control. Inflammatory arthritis that is left untreated damages joints permanently, and no cannabis-based medicine has been shown to prevent that.

Beyond that, the usual profile applies: drowsiness, dizziness, dry mouth, impaired concentration and driving impairment from THC-containing products. Many people with arthritis are older and take several medicines, which raises the risk of interactions and of falls; a specialist should take that seriously rather than treating age as incidental. Personal or family history of psychosis, unstable mental illness, significant cardiovascular disease, pregnancy and breastfeeding all count against treatment.

How medical cannabis is thought to help

Cannabis-based medicines act on the endocannabinoid system, a signalling network found throughout the brain, nervous system and immune cells that helps regulate pain, sleep, mood and inflammation. That broad role is why these medicines are studied across such different conditions — but a plausible mechanism is not the same as proven benefit, and in arthritis the controlled evidence is thin.

The two most studied plant compounds behave very differently. THC is intoxicating and acts directly on cannabinoid receptors; cannabidiol (CBD) is not intoxicating and works more indirectly. Where cannabis-based medicines are used in arthritis, the aim is to ease pain, stiffness and disturbed sleep rather than to alter the disease. Our guides on the endocannabinoid system and THC and CBD explain the difference in more detail.

The most important distinction is between pain and disease. In inflammatory arthritis the immune process that damages joints is treated by disease-modifying drugs; easing the pain does nothing to stop that damage, which is why a cannabis-based medicine is only ever a symptom treatment here.

What treatment involves in practice

Nothing is licensed for arthritis, so any treatment here is unlicensed and carried on specialist responsibility with your informed consent. If a specialist decides a monitored trial is justified, it starts at a low dose and is increased slowly — titrated — while benefit is weighed against side effects.

Products are usually oils or capsules taken by mouth, which act more slowly and last longer, or dried flower for vaporising, which acts faster; smoking is never a medical route. Because many people with arthritis are older and take several medicines, the choice is made carefully, with an eye on interactions, sedation and falls. How the format and dose are chosen is set out in how a dose is decided and adjusted and how cannabis-based medicines are taken.

Follow-up reviews check how you are responding and whether side effects are tolerable, and the plan is adjusted — or stopped — accordingly. Benefit is judged over weeks rather than a single dose, as how long cannabis medicines take to work explains. Treatment that is not clearly helping is stopped rather than continued indefinitely, and if you have inflammatory arthritis your disease-modifying treatment and rheumatology care continue throughout.

Questions worth asking your specialist

A good assessment is a two-way conversation. Whether treatment turns out to suit you or not, these are sensible questions to bring, alongside the practical guides on driving, work and drug testing, and travelling abroad:

• If I have inflammatory arthritis, is it well controlled on disease-modifying treatment first?
• Which problem are we targeting — pain, stiffness, sleep or function — and how will we measure it?
• How will this interact with my other medicines, and with any I take for other conditions?
• Given my age and falls risk, what side effects should I watch for?
• At what point would we agree the treatment is not helping and stop it?

If you want to take this further

The useful next step is a proper assessment, not a better list. Gather your diagnosis, the treatments you have already tried and what happened with each, and your current medicines — that is what a specialist needs in order to give you a straight answer.

The consultation itself, and what happens after it, is set out in What is the process to get a medical cannabis prescription? If arthritis-related pain is not the only thing you are being treated for, say so early: other conditions and other medicines change the assessment.

Patient guide · Written by the Flora House editorial team · Last reviewed: 7 October 2026