Why Are NHS Cannabis Prescriptions ‘Rare But Not Prohibited’?

Since the UK government’s 2018 decision to reschedule cannabis-based products for medicinal use, many patients have hoped for better NHS access to cannabis prescriptions. However, despite being legally prescribable under strict conditions, NHS cannabis prescriptions are still very uncommon. So why are these prescriptions rare but not prohibited? This blog uncovers the key reasons behind the cautious approach: the 2018 legal change, specialist-only prescribing rules, NHS funding considerations, and concerns about unlicensed cannabis-based medicines.

If you’re looking for a quick overview of cannabis clinics and guidance, tools like medicalcannabis.co.uk (a UK clinic directory and comparison site) and releaf.co.uk (an easy-to-understand explainer of cannabis medicines) can be helpful resources.

Understanding the 2018 Rescheduling: What Changed?

On 1 November 2018, cannabis-based products for medicinal use in humans were reclassified under UK law from a Schedule 1 (no recognised medical use) to Schedule 2 controlled drugs. What does this mean in plain English?

Before 2018: Cannabis was effectively illegal for medical use, so doctors could not prescribe it on the NHS under any circumstance.
After 2018: Cannabis-based medicines can legally be prescribed by doctors — but only under certain strict rules.

The key legal change was that cannabis-based products became lawful prescription medicines if the prescriber is a specialist doctor and if standard treatment options have been exhausted or deemed unsuitable. The rescheduling did NOT make cannabis products a first-line option for common conditions, nor did it guarantee NHS funding or even widespread availability.

So, to explain it simply: since 2018, cannabis medicines have a green light to be prescribed legally on the NHS, but the traffic is heavily regulated and cautious.

NHS Funding Versus Legal Prescribing: Why It Matters

This is the most commonly misunderstood aspect. Legal prescribing ≠ NHS funding.

Just because a doctor can legally prescribe a cannabis-based medicine, it doesn’t mean the NHS will pay for it.

Aspect Legal Prescribing NHS Funding Definition Doctor can write a prescription legally for cannabis medicines if criteria are met NHS pays for the cost of the prescribed medicine and supports through standard care pathways Availability Available if specialist agrees, and guidelines are followed Rare; NHS does not routinely fund most cannabis-based medicines Patient cost Prescription dispensed as usual if NHS-funded; otherwise patient pays privately Usually no direct patient cost unless medicine is private

In practice, the NHS usually regards cannabis medicines as not cost-effective or insufficiently evidenced for routine funding. Existing prescribing guidance from NHS England and NICE generally does not recommend routine use, except for very limited, highly specific cases (e.g., a few patients with rare epilepsy syndromes, spasticity in multiple sclerosis where other treatments have failed).

So, while your consultant might say “this could be prescribed,” the question of whether the hospital or NHS trust will fund it through routine channels is often a separate and much tougher hurdle.

Specialist-Only Prescribing: Why GPs Can’t Usually Prescribe Cannabis

The rules are strict about who can prescribe cannabis-based medicines on the NHS. This is mainly due to safety, complexity, clinical uncertainty, and the controlled drug status of these products.

Specialist prescribers only: NICE- and NHS England-sanctioned guidance states that only consultants or medical specialists with appropriate expertise should initiate and monitor cannabis prescriptions. General practitioners (GPs) can rarely initiate treatment.
Shared care agreements: Even in cases where the specialist starts the prescription, GPs may be asked for shared care roles, but many hesitate due to unclear guidance or concerns about licensing and liability.
Examples of specialists: Neurologists, pain specialists, paediatric epilepsy consultants — but only for considered cases with adequate clinical evidence and where other licensed treatments haven't worked.

To put it simply, you won’t usually get an NHS cannabis prescription from your GP because it’s meant to be a treatment reserved for very specific cases and expert oversight, rather than general use.

Unlicensed Cannabis-Based Medicines and NHS Caution

The majority of cannabis-based products available fall into the category of unlicensed medicines. These are formulations that have not undergone the full licensing and marketing approval process typical for most medicines in the UK. Examples include some cannabis oils or extracts prepared abroad or by compounding pharmacies.

Why does this matter for NHS prescribing?

Evidence and safety: The NHS requires robust clinical evidence and safety data before funding widespread use. Many unlicensed cannabis products lack such evidence. This makes NHS trusts hesitant to prescribe or fund them.
Regulatory caution: Unlicensed medicines are permitted only in limited circumstances on the NHS, generally when licensed options aren’t possible or adequate and clinical need is clear.
Variation in product quality: Without standardised formulations, dosages, or consistent quality, clinicians are understandably cautious.

Given this, most NHS cannabis prescribing to date is focused on licensed cannabis-based medicinal products — which tend to be few and targeted towards specific severe conditions.

What About Private Prescriptions and Prices?

Because of the limited NHS funding and cautious approach, many patients turn to private prescriptions from clinics specialising in medical cannabis.

If you’re researching clinics in the UK, medicalcannabis.co.uk lists and compares private cannabis clinics, showing service options and costs. However, do remember private prices vary widely depending on product type, dosage, and clinic.

Important: There were no specific prices for NHS cannabis prescriptions stated in available public information. If prices are mentioned in future reliable sources, it’s always best to quote them exactly and link clearly to the source https://vergemagazine.co.uk/can-you-get-medical-cannabis-on-the-nhs-a-guide-to-the-uk-system/ to avoid confusion.

Summary: What Does This All Mean for Patients?

The UK’s 2018 rescheduling of cannabis allowed specialist doctors to legally prescribe cannabis-based products — but only under very controlled and limited conditions.
The NHS funding for cannabis prescriptions is still exceptionally restricted, with most prescriptions happening privately, if at all.
Only specialist consultants—not GPs—can initiate NHS cannabis prescriptions due to complexity and safety concerns.
Unlicensed cannabis medicines are mostly off-limits on the NHS except in rare, carefully justified clinical scenarios, contributing to NHS caution.
Doing your homework beforehand by referencing trusted sites like medicalcannabis.co.uk and releaf.co.uk can help you understand your options better.

In short: NHS cannabis prescriptions are rare because they are reserved for exceptional cases with specialist oversight, not because they are illegal or banned outright.