Medical cannabis treatments for CFS

Yes, medical cannabis may help reduce the impact of some of the symptoms of chronic fatigue syndrome.

Chronic fatigue syndrome (CFS)/myalgic encephalomyelitis (ME) is a complex, long-term neurological and immune disorder where severe fatigue is not improved by rest. The issues this condition causes span well beyond ‘just feeling tired’, commonly resulting in dizziness, pain, headaches, nausea, anxiety, sensory sensitivities and more symptoms besides. 

Many CFS patients feel their lives are significantly affected by the symptoms of CFS, which can be treated with medical cannabis, finding that they are often unable to go about their daily activities. Over-exertion occurs easily and can lead to a patient having to stay in bed for an extended period of time afterwards.

As an ‘invisible disability’, due to the lack of outward symptoms, up to 91% of people with CFS/ME remain undiagnosed. This, and the fact that there are still no definitive tests for CFS or approved pharmaceutical drugs for treatment options, leads to many patients going untreated and feeling unseen. Recent Edinburgh University research estimates that about 404,000 people in the UK have ME/CFS, but it’s likely this number is considerably higher, especially post-COVID. 

A landmark study by the National Institutes of Health (NIH) found that incidence rates of ME/CFS are 15 times higher than pre-pandemic levels.

What symptoms does chronic fatigue syndrome cause?

The core symptom of CFS is extreme fatigue that lasts for at least 6 months and does not improve with rest. In fact, some people with CFS feel that too much rest can actually worsen symptoms.

CFS also causes post-exertional malaise (PEM), which is a profound crash after even minor exertion, such as going on a short walk or attempting simple household chores. 

Most people with CFS will experience insomnia and/or sleeping for very long periods of time but still waking up feeling unrefreshed, as well as brain fog, digestive issues, high sensitivity, heart palpitations, dizziness, muscle and joint pain, headaches and even flu-like symptoms. 

What treatments are currently available for chronic fatigue syndrome?

There is currently no treatment or cure for CFS or any approved medication for the condition. Instead, treatment focuses on highly personalised lifestyle management, which aims to help patients learn how to pace their energy expenditure. 

Metaphors like ‘spoon theory’ are often used to create an ‘energy currency’ that helps people living with CFS avoid a classic “push and crash” cycle. Painkillers might also be prescribed to manage pain-related symptoms, as well as low dose anti-depressants for mood and sleep.

Many CFS patients choose to try complementary and alternative medicine to manage specific symptoms, including medical cannabis, yoga and acupuncture. Some people also find symptom relief through dietary adjustments and supplements.

Can medical cannabis treatment help with my chronic fatigue syndrome symptoms?

Medical cannabis is frequently prescribed for chronic fatigue syndrome symptoms, including anxiety, sleep disturbances and chronic pain. 

Although medical cannabis cannot cure CFS, and studies specifically looking at medical cannabis for CFS are limited, there is an abundance of research indicating that cannabis can have a positive effect on numerous symptoms associated with the condition when taken in the correct dose and form. Anecdotal evidence from patients who have found relief from CFS symptoms using medical cannabis is also strong. 

One study recorded three years of real-time experience of 1224 people using a cannabis usage app, monitoring how cannabis affected fatigue intensity level. This data showed that, on average, 91.94% of people experience a decrease in fatigue following cannabis consumption. 

Another paper, published in 2023, found that of 2327 medical cannabis patients with chronic health conditions, the majority experienced a clinically meaningful improvement in fatigue, chronic pain, anxiety and depression after three months of medical cannabis administration. 

In November 2025, Releaf conducted the largest survey of active UK medical cannabis patients ever conducted at the time. Of the 1,669 respondents, 322 were taking medical cannabis for sleep related issues. 94.4% reported treatment efficacy. 

How does medical cannabis fit alongside pacing and energy management?

Pacing is a valuable energy management technique that can help people living with CFS prevent burnout. It can help to manage sleep, pain, anxiety and sleep problems alongside medical cannabis. 

Because cannabis may help with fatigue in chronic illness, as well as pain and dizziness, it’s possible that after cannabis treatment you might feel as though you have more energy than usual. 

But as cannabis isn’t a cure for CFS, it’s possible that pushing yourself too quickly with this newfound energy might lead to overexertion. To avoid this happening, stick with your usual pacing plan even if you find yourself feeling better. Continue to break tasks down into manageable steps, schedule rests, and keep a steady speed while using medical cannabis for chronic fatigue syndrome. You can find out more on pacing from the NICE pacing guidelines.

How does the endocannabinoid system relate to chronic fatigue syndrome?

Current medical science views CFS as a disorder deeply rooted in immune and nervous system dysregulation. Patients often exhibit an imbalance of inflammatory proteins (which leads to chronic low-grade inflammation), improperly functioning immune cells, neuroinflammation and an imbalance in the autonomic nervous system.

 he endocannabinoid system plays a key role in regulating all of these. You can read more about the biological foundations of CFS on the CDC website.

The endocannabinoid system (ECS) helps to maintain and regain, homeostasis across all bodily systems, so a dysregulated or dysfunctional ECS can lead to imbalance, potentially triggering inflammation, chronic pain and many other symptoms. If the ECS is dysregulated or deficien (twhich some researchers believe may contribute to a range of chronic illnesses with similar symptoms to CFS), it can be supported through the use of cannabinoids such as CBD and THC, which are in medical cannabis. 

What does the research say about cannabis and chronic fatigue syndrome?

There are no large-scale clinical trials specifically investigating cannabis for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS), but there are numerous patient surveys and observational studies that indicate medical cannabis as an effective alternative treatment for managing symptoms of the condition. 

There are also many studies with positive results researching the use of cannabinoids for the different symptoms (including pain, anxiety, nausea and insomnia), albeit not directly related to CFS. 

It is widely hypothesised that CFS may involve underlying low-grade neuroinflammation, as well as chronic systemic inflammation, so studies looking at how cannabinoids may reduce inflammation (and therefore reduce related symptoms including pain, brain fog, anxiety, headaches, sensitivity and fatigue) are of particular interest. Pre-clinical and clinical studies suggest that cannabinoids, especially CBD, CBG and THC (even more so when taken together as in whole plant medical cannabis flower or cannabis oil prescribed by Releaf), may significantly reduce inflammation. 

What forms of Releaf medical cannabis can be legally prescribed for chronic fatigue syndrome?

Legal medical cannabis in the UK is available in a variety of forms. If you are eligible for medical cannabis treatment, your Releaf consultant can prescribe medical cannabis strains, THC vapes, medical cannabis oil, capsules or pastilles.

Could medical cannabis make my ME/CFS worse?

The main risk to consider is that medical cannabis might improve symptoms and lead you to mistakenly push yourself too hard, causing burnout. Even if you feel better than usual when taking medical cannabis, it’s still important to use energy management if you live with CFS.

Can medical cannabis help with the brain fog linked to ME/CFS?

Many patients who use medical cannabis find it helps with brain fog and there are some studies that suggestcertain cannabinoids (especially CBD) may help with improved cognitive function, highlighting neuroprotective and anti-inflammatory properties.

Can medical cannabis help with the nausea that comes with severe ME/CFS?

Research shows that cannabinoids are effective at treatin nausea when given at the right dose. Randomised, placebo-controlled trials have shown that a combination of THC  and CBD can significantly reduce nausea and vomiting for patients undergoing chemotherapy.

I have tried CBD oil from a high street shop, and it did not help. Is prescription medical cannabis different?

Shop-bought CBD oil is a food supplement, while medical cannabis is a medicine, and they adhere to entirely different regulations. Medical cannabis can also legally contain THC, while high-street CBD oil can’t.