Conditions and Symptoms
Medical cannabis for multiple sclerosis in the UK
For some adults with multiple sclerosis, the cannabis-based medicine that matters in UK care is a THC:CBD mouth spray, not a general-purpose cannabis product. It is considered only for a narrow group of people with...
For some adults with multiple sclerosis, the cannabis-based medicine that matters in UK care is a THC:CBD mouth spray, not a general-purpose cannabis product. It is considered only for a narrow group of people with spasticity who have not improved enough on other treatment.
Key takeaways
- NICE recommends a 4-week trial of THC:CBD spray for moderate to severe MS spasticity if other medicines have not worked.
- Continue treatment only if there is a meaningful improvement in spasticity-related symptoms.
- The licensed UK product is nabiximols, also known as Sativex, and it is taken as an oromucosal spray.
- This is not a cure for MS, and it is not suitable for every patient with MS.
- Side effects, interactions, driving, and pregnancy still matter.
Evidence base
NHS guidance says nabiximols (Sativex) is licensed in the UK for adults with MS-related muscle spasticity that has not got better with other treatments. NICE recommends offering a 4-week trial of THC:CBD spray for moderate to severe spasticity in adults with MS if other pharmacological treatments are not effective.
NICE also sets a clear stopping rule: continue the spray only if the person has had at least a 20% reduction in spasticity-related symptoms after the trial. NHS England guidance says this licensed THC:CBD spray should be used over unlicensed cannabis-based products for medical use in MS spasticity.
That means the evidence-based pathway is narrow and product-specific. It is about spasticity in adults with MS, not about every MS symptom and not about oils, edibles, or shop-bought CBD.
What patients should know
If you are offered this treatment, the aim is usually to reduce stiffness or spasms enough to help sleep, movement, comfort, or daily care. A simple symptom diary can help you and your specialist decide whether it is really helping.
You should also ask whether the medicine could make you dizzy, sleepy, or mentally foggy, especially if you already take other medicines that affect alertness. If you drive, cycle in traffic, or work at height, that needs to be discussed before you start.
Do not assume that cannabis oils, edibles, or non-prescription products are equivalent to the licensed MS spray. They are not the same medicine, and they are not assessed in the same way.
If your MS symptoms change suddenly, the cause may be more than spasticity alone. Infection, relapse, or another problem may need review.
When to speak to a clinician
Speak to a clinician if:
- your stiffness or spasms are affecting sleep, walking, or hygiene
- you are unsure whether you fit the NICE criteria
- the spray causes side effects or does not help during the trial
- you take other medicines that can cause drowsiness or dizziness
- you are pregnant, breastfeeding, or planning pregnancy
- you notice sudden new weakness, fever, bladder symptoms, or vision change
If the treatment is not clearly helping, it is better to stop on plan than to continue a medicine that is adding cost or side effects without enough benefit.