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BlogWhat Is CBN? A Quick Guide to Cannabinol

What Is CBN? A Quick Guide to Cannabinol

5 min read

July 30, 2025

Emily Ledger

What Is CBN? A Quick Guide to Cannabinol

As recognition of medical cannabis in the UK gradually improves, more people are becoming aware of the various compounds that contribute to the plant’s therapeutic effects. But while CBD and THC continue to hold on to the spotlight, there are a whole host of cannabinoids that receive less attention, including cannabinol (CBN). So, what is CBN? In this article, we’re covering everything you need to know.

Contents

What is cannabinol?

Cannabinol - or ‘CBN’, as it is more widely known - is one of over 100 chemical compounds known as phytocannabinoids. Despite not being as well-known as cannabidiol (CBD) or tetrahydrocannabinol (THC), cannabinol is one of the most common of these compounds, which are exclusive to cannabis plants. 

CBN is primarily formed when THC is oxidised - that is, exposed to oxygen, light, and heat - which typically occurs during the ageing process of cannabis. As such, CBN is usually found in higher concentrations as cannabis is stored and cured. 

Like other cannabinoids, including phytocannabinoids found in cannabis and endocannabinoids, which are produced in the body, CBN interacts with the endocannabinoid system (ECS) - and potentially other receptor systems - to produce a number of effects. 

Is cannabinol psychoactive?

Some cannabinoids, like THC, produce changes in mood, cognitive function, behaviour, or generally how the brain works. These are classed as “psychoactive” effects, and they can vary from having a calming effect to significantly affecting perception and cognitive function.

So, is CBN psychoactive?

Evidence suggests that CBN can cause some psychoactive effects, such as sedation and dizziness; however, it is much less potent than THC, with much higher doses required to achieve these effects. 

What is the difference between CBD and CBN?

Their names may sound similar, and indeed, both cannabidiol (CBD) and cannabinol (CBN) are relatively common cannabinoids; however, there are some significant differences between these two cannabis compounds. 

The most obvious difference is that in the UK, CBD formulations - or products containing CBD - can be purchased over the counter in a variety of health and wellness stores. CBN on the other hand is a compound that is present in a number of prescribed cannabis based treatments. 

But, that's not all.  

While CBD is often referred to as being non-psychoactive, this isn’t strictly true as the compound can still affect brain function. However, CBD does not cause any intoxicating effects, which may be experienced as a result of exposure to high doses of CBN. Nonetheless, the psychoactive effects of CBN are considered to be extremely mild, especially compared to those of other cannabinoids.  

What are the therapeutic effects of cannabinol?

Clinical research into the therapeutic effects of CBN is still in its infancy, especially compared to that of more well-known cannabinoids like CBD and THC. However, some early findings suggest that there may be several potential benefits of CBN. 

Cannabinol for sleep

As mentioned above, CBN may produce sedative effects in some settings. A small number of studies have aimed to discern whether this property could make CBN useful for achieving better sleep. For example, a double-blind, randomised, placebo-controlled study tested the effects of CBN, with and without CBD, on sleep quality in participants with poor sleep. 

The results indicated that, compared to placebo, 20 mg CBN demonstrated a potentially meaningful effect on sleep quality and was associated with a reduction in sleep disturbance and the number of awakenings. 

However, it’s important we emphasise that more research is needed to understand whether these effects are clinically significant. 

Cannabinol for pain

Like many other cannabinoids, CBN has been found to interact with the Cannabinoid 2 (CB2) receptors in our endocannabinoid system, which play a crucial role in regulating inflammation. CBN has also been seen to affect non-cannabinoid receptors, including TRP channels, peroxisome proliferator-activated receptors (PPARs), and serotonin receptors, which also contribute to the modulation of pain and inflammation.

However, few studies have investigated the pain-relieving potential of CBN in humans. Again, more research is needed to understand the mechanisms of CBN in the human body and its implications in the management of pain.

Do medical cannabis products contain cannabinol?

CBN is a relatively common cannabinoid which is found in a wide variety of cultivars. As such, it is commonplace in many broad-spectrum and full-spectrum cannabis products. But, is CBN legal in the UK? 

Cannabinol can be found in many cannabis-based medicines, including those available on prescription in the UK. At Releaf, a number of our medical cannabis products contain cannabinol, alongside other cannabinoids such as CBD and THC, and other cannabis compounds like terpenes. 

Cannabinol and medical cannabis in the UK

All cannabis-based medical products - including those containing cannabinol - are only legal in the UK when they are prescribed by a specialist doctor. Since legislation was amended in 2018, cannabis-based medicines have been available on prescription for a wide range of conditions and symptoms. 

If you’d like to learn more about medical cannabis, including the treatments and services offered at Releaf, you can find more information and resources on our Blog and Education section. 

To find out if you could be eligible for medical cannabis treatment, complete our quick and easy Eligibility Checker today or get in touch with one of our specialists.

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Emily Ledger

Emily, an accomplished content writer with a specialisation in cannabis and alternative health, leverages her five years in the sector to enhance education and diminish stigma around medicinal cannabis use.

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All of our articles are written by medical cannabis experts, guided by strict sourcing guidelines, and reference peer-reviewed studies and credible academic research. Our expert clinical team and compliance specialists provide valuable insights to ensure accuracy when required. Learn more in our editorial policy.

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Further reading

What are medical cannabinoids?

If you’re new to the world of medical cannabis, the wide range of content and information that centres around cannabinoids, and their concentrations within your medicine, can make it feel like you’re trying to decipher another language.

04. 01. 2024

Lucy MacKinnon

What is CBG?

It may not be as well known as its fellow cannabinoids CBD and THC, but early research suggests CBG has significant potential in a range of health conditions; from easing anxiety to helping tackle antimicrobial resistance. Here’s everything you need to know.

04. 10. 2024

Sarah Sinclair

Exploring the role of terpenes in medical cannabis treatments

Taking the first steps into the world of medical cannabis can be slightly overwhelming. With so many new terms to get your head around, the learning curve can feel steep. Don't worry, though - here in our continued "New Patient" guide, we've got you covered.

14. 05. 2024

Sam North

CBD vs THC: What’s the difference, and is medical cannabis right for you?

CBD and THC come from the same plant, but they work in different ways and serve different roles in treatment. This guide walks through how each interacts with the body, what they’re prescribed for, and how medical cannabis is accessed in the UK. If you’re exploring alternatives to conventional medication, this is a clear, evidence-based place to start.

30. 04. 2024

Sam North

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