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Can CBD Cause Brain Fog?

No! CBD does not cause brain fog, but...

It is no secret that cannabis is addictive and causes euphoria. However, CBD is a very different thing. Though it is extracted from cannabis, it does not cause euphoria or a high, hence the popularity of CBD vape pens. However, it may still alter the working of the brain. Thus, it is right to ask, “Can CBD cause brain fog?”

Does CBD Influence the Working of the Brain?

Here, there are a few things to understand: that though CBD does not cause euphoria or high like marijuana, it does not mean that it does not alter brain function.

When it comes to cannabis or marijuana, its mind-altering actions are mainly due to a compound called THC. This cannabinoid (THC) is addictive at higher dosages and causes a high. However, legally sold CBD products like CBD Oil Vape Pen either do not contain THC or contain it in minute and legally permitted amounts.

THC may still influence the working of the brain at legally permitted amounts, but it would not cause high.

Similarly, it is true that CBD does not cause high. However, this must not cause confusion. It does not mean it does not influence the brain’s working. CBD’s actions on the brain are very different and subtle. It generally enhances focus and reduces feelings of stress and anxiety.[1]

What is Brain Fog?

The term brain fog is commonly used these days to describe a specific kind of state of mind. However, doctors rarely use it, as they like to be more precise. Therefore, before understanding if CBD can cause brain fog, it is vital to know what it is.

Brain fog is a term people use to describe a condition where one finds it difficult to concentrate and learn. A person who experiences brain fog has cognitive “slowness.” It also causes some fatigue. Overall, it means compromised brain function but not significant pathology.[2]

People often experience brain fog when they get ill, like those affected by flu, Lyme disease, long-COVID, chronic fatigue syndrome, fibromyalgia, and various neurological and psychiatric conditions. So, it may be mild, but it is a pretty common phenomenon.

Brain fog is difficult to diagnose, as the condition has no fixed criteria. Nevertheless, those affected by the condition continue to experience significant distress. It often tends to be chronic.

Can CBD Cause Brain Fog?

In short, CBD rarely causes brain fog, and it may even help manage it. Some people might experience brain fog after using CBD products or vapes.

As a rule, CBD does not significantly impact the brain’s working. It does not cause euphoria. On the contrary, it may even help overcome some of the signs of brain fog. It may have a relaxing impact, but it may also help enhance mood, reduce fatigue, and improve learning and reasoning in some cases.

However, as the experience shows, people react differently to things that affect the working of the brain. It means that some people may rather experience symptoms similar to brain fog. Such issues are more likely to occur in beginners or those who abuse CBD vaping.

If a person experiences brain fog after CBD intake or vaping, one should not be quick to jump to conclusions. It is vital to understand that CBD products contain many other organic compounds. Thus, most CBD vapes contain aromas, terpenes, and probably some other compounds.

Hence, if you experience brain fog after using CBD products, just try changing the brand or flavour. It is pretty likely that one may have a completely different experience by changing the product.

Understanding that CBD is even used to manage brain fog is vital. Thus, researchers are now testing its role in managing issues like chronic fatigue syndrome and fibromyalgia.[3]

Similarly, chronic stress is one of the leading causes of brain fog, and CBD may be a good way to manage such stress.

Additionally, CBD is known to promote sleep. Sleep disturbances are among the leading causes of brain fog. It means that regular CBD use may instead help overcome brain fog.

The Bottom Line

To sum up, there are a few things to understand. CBD is very different from cannabis, and it does not cause significant and immediate changes in the working of the brain and sensations – it does not cause high or euphoria. Nonetheless, the question is interesting, and it may come to anyone’s mind Does vaping make you high ?

On the contrary, CBD has a mild relaxing effect on the brain. It enhances sleep quality, reduces stress, and helps overcome anxiety. It may also help reduce pain sensation. It enhances the feeling of well-being. Ultimately, it improves focus and energy levels and even helps overcome brain fog.

In rare instances, things may differ. Some people do not tolerate CBD well. In such instances, CBD may cause nausea and other issues, CBD vape pen for nausea Fortunately, such reactions are rare, nevertheless, a possibility. Thus, many individuals use 

Hence, our recommendation is that people must use CBD responsibly. CBD is very safe and rarely causes any health issues. However, abusing any substance is bad for physical and mental health.


  1. Batalla A, Bos J, Postma A, et al. The Impact of Cannabidiol on Human Brain Function: A Systematic Review. Front Pharmacol. 2020;11:618184.
  2. McWhirter L, Smyth H, Hoeritzauer I, et al. What is brain fog? J Neurol Neurosurg Psychiatry. 2023;94:321–325.
  3. Berger AA, Keefe J, Winnick A, et al. Cannabis and cannabidiol (CBD) for the treatment of fibromyalgia. Best Pract Res Clin Anaesthesiol. 2020;34:617–631.
Dr Preet Pal Singh Bhinder

This article was authored by: Dr. Preet Pal Singh Bhinder.

This article was peer-reviewed by Dr M Mansoor Siddique (PhD). Dr Siddique has over eight years of experience working with CBD and CBD products.

Disclaimer: All of our products are not intended to diagnose, treat or cure any disease. It is recommended to check with doctor before starting a new dietary supplement program. All CBD products sold have less than 0.2% THC content and abide by both EU an UK law.



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