As the popularity of CBD (cannabidiol) has grown in the UK market, throughout Europe and particularly the US, it’s become a part of many people’s health and lifestyle routines. Some people have been using it for years, others are just now discovering how it can improve their life.True of every supplement, it’s important to do your research and understand the possible side effects of taking any dose of CBD and assess your own personal risks.

Introduction to CBD

If you are brand new to CBD, please read our guide on CBD, including ‘what is CBD’, ‘what is CBD oil’ and ‘what are the benefits’. From arthritis to crohn’s disease patients, a number of people try it and are generous enough to share their own experiences, such as James Walford who spoke to us on our blog here.

Are there side effects of CBD oil?

A number of studies suggest that CBD is generally safe and non-toxic for humans, even up to high doses. However, whilst humans generally tolerate doses of CBD well, some people can be more sensitive than others to the effects of cannabinoids and may experience side effects.

List of noted side effects

These side effects of CBD include:

  • Diarrhea
  • Tiredness
  • Appetite changes
  • Nausea and vomiting
  • A dry mouth
  • Lightheadedness
  • Drowsiness
  • Low blood pressure

Before starting CBD, consult your GP or healthcare provider. Side effects would be felt more with higher doses and it’s always recommended if you’re a first time user to try a lower dose before increasing it.

Will CBD interact with your medications?

If high enough doses of CBD are taken, it may inhibit the production of enzymes CYP450 by the liver which the body uses to break down certain medications/pharmaceutical drugs. In essence, CYP450 breaks drugs down to cells can better absorb them.

If you take any pharmaceutical medicines or drugs, including blood thinners, check with your doctor before taking CBD to discuss how they might interact.


  • Consult your GP or healthcare provider before taking CBD
  • CBD has some potential side effects but most would occur when taking extremely high doses, not for casual, low dosage users
  • Always buy CBD from a trusted seller where you can view the certificate of analysis to understand what’s in the product you’re buying

For more information on cannabis oil, please see this NHS resource.


Always check with your GP if you have any health concerns. We do not sell CBD products as a medicinal product and they are in no way intended to be used to diagnose, cure, prevent or treat disease. They are sold here purely as food and health supplements. Always consult your health professional before taking any food supplements.

If you would like to know more about our CBD range, please email us on and we will be happy to discuss it further.