“CBD inhibits the cytochrome P450 enzymes that break down important psychiatric drugs,” says Blessing. CBD isn’t the only substance that messes with the body’s ability to metabolize these drugs — both St. John’s wort and the humble grapefruit are unfriendly — but CBD is comparatively poorly studied. The way CBD inhibits those enzymes could dramatically raise the levels of SSRIs or opioids in the system, potentially leading to an overdose.

You only have to read the reviews under a CBD product on the Holland & Barrett website to see the extent to which anecdotal reports cannot be trusted. More than 100 customers gave Jacob Hooy CBD+ Oil five stars, with a few saying they always noticed if they missed a dose (presumably this made them less relaxed, although they did not reveal what they were taking it for), while 93 people gave it one star, saying it did nothing, or was too weak. One couple even said it gave them palpitations and a sleepless night. All these people had different conditions, expectations and situations. “And,” says McGuire, “you have to remember that anything can have a placebo effect.” While it looks unlikely that the recommended doses of these products will do any harm, McGuire’s guess is that doses are so small “that it’s like homeopathy – it’s not going to do anything at all”.

All material provided within this website is for informational and educational purposes only, and is not to be construed as medical advice or instruction. No action should be taken solely on the contents of this website. Consult your physician or a qualified health professional on any matters regarding your health and well-being or on any opinions expressed within this website. The information provided in our newsletters and special reports is believed to be accurate based on the best judgement of the Company and the authors. However, the reader is responsible for consulting with their own health professional on any matters raised within. Neither the company nor the author's of any information provided accept responsibility for the actions or consequential results of any action taken by any reader.


Determining risks and benefits through proper clinical trials remains highly desired, but these will take considerable time and funds. As a result, clinical data will not appear any time soon, while patients will not simply stop using the many CBD products to which they have become accustomed. Taking back regulatory control over CBD could therefore start with a more short-term and achievable approach, i.e., demanding accurate and proper labeling, reflecting in detail what each product does and does not contain, and how it was manufactured. For a clearer judgment of the potential therapeutic effects, the risks, but also the legality of a cannabis extract, it is important to know its exact composition. After all, published data from around the world has taught us that misleading labels as well as harmful contaminants are real and actual problems for CBD products. The analytical methodology and the third-party labs needed for this approach largely already exist, and could easily be optimized to quickly get a better grip on the unrestrained cannabinoid market. This approach would hold each producer strictly accountable for the quality and safety of their own products, as long as there are real legal consequences for those businesses that break the rules. Add to this a system for regular professional audits and inspections, and a crackdown on unsubstantiated health claims, and we have a reasonable system to ensure that CBD can be used responsibly by those who need it, until much needed clinical data become available.


The 2016 European Journal of Pain conducted a study on rat models to test the effectiveness of CBD against arthritis in order to see if it could serve as an all-natural alternative to the typical arthritis pain medications, which are often tied with numerous uncomfortable and frustrating side effects. The rats were treated for 4 days with 4 different doses of CBD gel, and the results were quite staggering.

Scientists have made a lot of progress in understanding how CBD produces its calming, pain-reducing, anti-inflammatory effects in the body—and there’s still more to learn. We know that CBD interacts with many different receptors, proteins, and other chemicals in the brain. These interactions create changes in the activity of neurotransmitters, hormones, and other cells throughout the brain and body. Through these interactions, CBD appears to be able to affect many of the body’s functions, from sleep-wake cycles and emotional regulation to inflammation, pain perception, and seizures.

Cannabis CBD Topical Products

×