Can you get medical cannabis for insomnia or sleep problems in the UK?

Sleep is the symptom people most often want fixed, and the one least often prescribed for on its own. UK specialists generally consider sleep problems where they are tied to an underlying condition already being treated — chronic pain, PTSD, a neurological condition — rather than as a stand-alone reason to prescribe.

Are sleep problems treated with medical cannabis in the UK?

Usually as part of treating something else. Where a specialist is already assessing you for chronic pain, PTSD, MS or another long-term condition, sleep is one of the outcomes they will track and try to improve. Insomnia on its own, with no underlying condition, is not a typical route to a private prescription in the UK.

The reason is that insomnia has a well-evidenced first-line treatment that is not a medicine. Cognitive behavioural therapy for insomnia (CBT-I) is recommended ahead of drug treatment in UK practice, is available through the NHS in some areas and through digital programmes, and produces durable improvement in a way that sedatives generally do not. NICE guidance on insomnia points the same way, with hypnotics reserved for short-term use.

There is also a diagnostic question that has to come first. Poor sleep can be a symptom of obstructive sleep apnoea, restless legs syndrome, depression, an overactive thyroid or a circadian rhythm disorder — each of which needs a different treatment, and some of which are made worse by sedation.

What the evidence actually shows

There is one properly conducted randomised trial in chronic insomnia, and it is small but positive. Nothing about it establishes cannabis-based medicines as an insomnia treatment, and the trial's own authors called for larger studies.

The ZTL-101 trial, published in Sleep, was a randomised, double-blind, placebo-controlled crossover study of a two-week nightly sublingual cannabinoid extract in 23 people with chronic insomnia. Compared with placebo, it reduced Insomnia Severity Index scores by about five points, shortened self-reported time to fall asleep, increased total sleep time and improved sleep quality and feeling rested on waking. Forty mild adverse events were reported, most resolving overnight; there were no serious adverse events.

Twenty-three people over two weeks tells you little about months of use, and nothing about tolerance — the tendency for sedative effects to diminish with regular use, which is well recognised with cannabis and is the usual reason doses creep upward.

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 sleep problems they will typically look at:

• Whether an underlying condition is driving the sleep problem, and whether it is being treated
• Whether you have been screened for obstructive sleep apnoea, particularly if you snore or wake unrefreshed
• Whether you have tried CBT-I, and whether you were able to complete it
• Your sleep pattern, shift work, caffeine, alcohol and screen habits — assessed properly, not dismissed
• Which sleep medicines you have used, including over-the-counter ones, and for how long
• Depression and anxiety, which frequently present as insomnia and need treating in their own right

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

Sleep apnoea is the risk that matters most and is most often missed. Sedating medicines can worsen breathing interruptions during sleep, so a specialist should screen for it before prescribing anything sedating — not after.

Tolerance develops with regular use, meaning the same dose does less over time, and stopping after regular use commonly causes rebound insomnia and vivid dreams that can feel worse than the original problem. THC also suppresses REM sleep, and the long-term consequences of that are not well characterised. Next-day drowsiness affects driving. As elsewhere, a personal or family history of psychosis, unstable mental illness, pregnancy and breastfeeding count against treatment.

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 sleep problems 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: 31 August 2026