Is Epidyolex the same as medical cannabis?

Epidyolex is a pharmaceutical-grade, purified CBD oral solution derived from cannabis. It contains no THC and holds a formal marketing authorisation following clinical trials in Dravet and Lennox-Gastaut syndromes.

Can adults with epilepsy access cannabis-based medicines on the NHS?

Adult NHS prescribing for epilepsy outside the Epidyolex licence remains very rare. Adults with treatment-resistant epilepsy currently find private specialist prescribing more accessible.

Could cannabis-based medicines interact with my existing anti-seizure medications?

Yes — CBD is known to affect blood levels of certain anti-epileptic drugs, notably clobazam and valproate. Your specialist will account for these interactions and may recommend monitoring of drug levels.

Are there THC-containing cannabis medicines for epilepsy?

Most epilepsy prescribing focuses on CBD-dominant products. THC is generally avoided in epilepsy due to its potential to lower the seizure threshold in some individuals.

What if cannabis-based medicines do not reduce my seizures?

Your specialist will assess clinical benefit at defined intervals — typically after two to four months — and will discontinue treatment if there is no meaningful response.

Which UK cannabis clinic is best for epilepsy?

Sapphire Medical Clinics and TMCC (The Medical Cannabis Clinics) have the most established track records for epilepsy. Lyphe and Zerenia also accept epilepsy referrals. Always confirm with the clinic directly before booking, as epilepsy prescribing requires neurological specialist involvement.

Can I get a cannabis prescription for focal epilepsy?

Focal (partial) epilepsy can qualify for private cannabis prescribing if you have drug-resistant seizures — meaning adequate trials of at least two anti-seizure medications have not provided sufficient control. A neurologist must be involved in the prescribing decision.

Is medical cannabis safe for epilepsy patients?

CBD-dominant cannabis medicines have a good safety profile in epilepsy research. The main risks are drug interactions with existing anti-epileptic medications (particularly clobazam and valproate), drowsiness, and gastrointestinal effects. Your specialist will monitor for these carefully.

Medical Cannabis for Epilepsy in the UK

Epilepsy is the condition with the most direct NHS pathway for a cannabis-based medicine in the UK. Epidyolex, a purified CBD oral solution, is approved by NICE for use in certain rare treatment-resistant epilepsy syndromes (Dravet syndrome and Lennox-Gastaut syndrome) in patients aged 2 and over — including adults. For adults and children with treatment-resistant epilepsy not covered by this approval, private specialist prescribing may be considered.

What is Epilepsy?

Epilepsy is a neurological condition characterised by recurrent, unprovoked seizures — episodes of abnormal electrical activity in the brain. It is one of the most common serious neurological conditions in the UK, affecting people of all ages. Seizures vary considerably in type and severity: focal seizures originate in one part of the brain, while generalised seizures involve widespread electrical disruption.

Approximately a third of people with epilepsy continue to experience seizures despite trying multiple anti-seizure medications — termed drug-resistant or refractory epilepsy. Refractory epilepsy is associated with higher injury risk, social stigma, reduced independence, and in some cases increased risk of sudden unexpected death in epilepsy (SUDEP).

Medical Cannabis and Epilepsy — What Does the Evidence Say?

Epilepsy has the strongest and most direct evidence base for cannabis-based medicines among all conditions currently treated in the UK. Epidyolex — a pharmaceutical-grade, purified CBD solution — was developed following compelling clinical trial data demonstrating significant reductions in seizure frequency in Dravet syndrome and Lennox-Gastaut syndrome. NICE has recommended Epidyolex as a treatment option for these conditions when used alongside the anti-seizure medication clobazam.

Beyond Epidyolex, clinical literature on cannabis-based medicines and epilepsy includes observational data from the UK's own Early Access to Medicines Scheme (EAMS) and international programmes. This data suggests that some patients with other forms of refractory epilepsy may experience reductions in seizure frequency with CBD-dominant or balanced cannabis products.

Who Qualifies for a Medical Cannabis Prescription for Epilepsy?

Epidyolex (NHS pathway): Children and young people with Dravet syndrome or Lennox-Gastaut syndrome being treated with clobazam who have not responded adequately to other anti-seizure medications.
Other cannabis-based medicines (private pathway): Patients with other forms of drug-resistant epilepsy who have tried at least two appropriate anti-seizure medications without adequate seizure control.
Specialist involvement: A neurologist or paediatric neurologist must be involved in prescribing decisions for epilepsy.

Epidyolex on the NHS — What Patients Need to Know

Epidyolex (cannabidiol) is the first and currently only cannabis-derived medicine to receive full marketing authorisation and NICE approval in the UK. It contains no THC — only highly purified CBD — and is manufactured to pharmaceutical standards by Jazz Pharmaceuticals.

NICE approved Epidyolex in 2019 as an add-on treatment for seizures associated with Dravet syndrome or Lennox-Gastaut syndrome in patients aged 2 years and over, when used alongside clobazam. For patients who meet this criteria, NHS prescribing is the appropriate first step — speak to your paediatric neurologist or adult neurologist, who can initiate or refer for Epidyolex prescribing.

The NHS pathway for Epidyolex is distinct from the private cannabis clinic model. If you have Dravet or Lennox-Gastaut syndrome and have not yet explored NHS access, this should be your starting point before considering private prescriptions.

Drug-Resistant Epilepsy and Private Cannabis Prescriptions

For patients whose epilepsy does not fit the Epidyolex NICE criteria — or where NHS prescribing has not been possible despite eligibility — the private specialist pathway exists. Drug-resistant (refractory) epilepsy means your seizures have not been controlled despite trying at least two appropriate anti-seizure medications at adequate doses.

Private cannabis clinics treating epilepsy in the UK work exclusively with CBD-dominant or high-CBD products. THC-containing products are generally not appropriate for epilepsy due to the risk of lowering the seizure threshold. Common products include:

High-CBD oral oils: The most commonly prescribed format for epilepsy — precise dosing, consistent absorption.
CBD flower (vaporised): Used in some adults, though not a standard first-line for epilepsy.
Pharmaceutical-grade CBD capsules: Some patients prefer the convenience of capsule formats.

The treating specialist must be a neurologist or work closely with one — this is a legal requirement for cannabis prescribing in epilepsy under UK guidance. Most private cannabis clinics will require a referral letter or evidence of specialist involvement.

Which UK Clinics Treat Epilepsy?

Not every UK cannabis clinic treats epilepsy. Epilepsy prescribing requires specialist neurological involvement, making it more complex than pain or sleep conditions. The clinics with established experience in epilepsy prescribing include:

Sapphire Medical Clinics — one of the longest-established UK cannabis clinics with specific experience in neurological conditions including epilepsy.
Lyphe Clinic — offers specialist assessments and works with neurologists for complex presentations.
The Medical Cannabis Clinics (TMCC) — has treated epilepsy patients and has neurological expertise within their team.
Zerenia Clinic — accepts epilepsy referrals though availability varies by presentation.

If you are considering a private consultation for epilepsy, contact the clinic directly to confirm they accept your specific diagnosis before booking — some clinics are better equipped for focal epilepsies, others for generalised syndromes.

Medical Cannabis for Children with Epilepsy in the UK

Most UK private cannabis clinics treat adults only (18+). For children with epilepsy, the primary route is the NHS Epidyolex pathway via a paediatric neurologist. Private prescribing for children exists but is highly specialised and rare.

High-profile cases such as Billy Caldwell and Alfie Dingley were instrumental in changing UK cannabis prescribing law in 2018 — both children had severe, drug-resistant epilepsy. Their cases established the legal framework that today allows any licensed UK specialist to prescribe cannabis-based medicines. For most children, however, the NHS pathway via paediatric neurology remains the standard starting point.

What to Expect from a Medical Cannabis Consultation for Epilepsy

Consultations for epilepsy-related cannabis prescribing are particularly detailed. The specialist will review your full seizure history — types, frequency, duration, triggers — alongside your complete anti-seizure medication history. The prescriber will assess for genuine treatment resistance and potential drug interactions (CBD is known to affect serum levels of certain anti-epileptic drugs). Dosing is titrated slowly with regular monitoring of seizure frequency and tolerability. Co-occurring conditions — including anxiety and sleep disruption — are commonly assessed, as they may influence product selection.

How Much Does Medical Cannabis Cost for Epilepsy in the UK?

Epidyolex via NHS: For eligible Dravet or Lennox-Gastaut patients, Epidyolex may be NHS-funded following NICE guidance, subject to local commissioning decisions.
Private initial consultation: £79 to £200.
Monthly medication (private): £150 to £400 per month.
Follow-up appointments: £50 to £100 per session.

Frequently Asked Questions — Medical Cannabis for Epilepsy UK

Is Epidyolex the same as medical cannabis?: Epidyolex is a pharmaceutical-grade, purified CBD oral solution derived from cannabis. It contains no THC and holds a formal marketing authorisation following clinical trials in Dravet and Lennox-Gastaut syndromes.
Can adults with epilepsy access cannabis-based medicines on the NHS?: Adult NHS prescribing for epilepsy outside the Epidyolex licence remains very rare. Adults with treatment-resistant epilepsy currently find private specialist prescribing more accessible.
Could cannabis-based medicines interact with my existing anti-seizure medications?: Yes — CBD is known to affect blood levels of certain anti-epileptic drugs, notably clobazam and valproate. Your specialist will account for these interactions and may recommend monitoring of drug levels.
Are there THC-containing cannabis medicines for epilepsy?: Most epilepsy prescribing focuses on CBD-dominant products. THC is generally avoided in epilepsy due to its potential to lower the seizure threshold in some individuals.
What if cannabis-based medicines do not reduce my seizures?: Your specialist will assess clinical benefit at defined intervals — typically after two to four months — and will discontinue treatment if there is no meaningful response.
Which UK cannabis clinic is best for epilepsy?: Sapphire Medical Clinics and TMCC (The Medical Cannabis Clinics) have the most established track records for epilepsy. Lyphe and Zerenia also accept epilepsy referrals. Always confirm with the clinic directly before booking, as epilepsy prescribing requires neurological specialist involvement.
Can I get a cannabis prescription for focal epilepsy?: Focal (partial) epilepsy can qualify for private cannabis prescribing if you have drug-resistant seizures — meaning adequate trials of at least two anti-seizure medications have not provided sufficient control. A neurologist must be involved in the prescribing decision.
Is medical cannabis safe for epilepsy patients?: CBD-dominant cannabis medicines have a good safety profile in epilepsy research. The main risks are drug interactions with existing anti-epileptic medications (particularly clobazam and valproate), drowsiness, and gastrointestinal effects. Your specialist will monitor for these carefully.