CBD guide UK guide to possible side effects of CBD oil

Possible Side Effects of CBD

CBD is generally well tolerated and rarely produces side effects. Whilst most people who use CBD do not report any side effects at all, some may include a slight decrease in blood pressure, a dry mouth, light headedness, drowsiness, a decrease in appetite and mood changes.

The FSA (The Food Standards Agency in the UK) as a precaution, recommends that healthy adults should not take more than 70mg of CBD oil a day. This equates to about 28 drops of 5% CBD.

However, additional precautions should be taken if you fall into the below category:

People who are taking prescribed medications

People who are taking prescribed medications should be careful or avoid taking CBD. CBD may decrease the activity of liver enzymes, called cytochrome P450, which are responsible for metabolizing more than 60% of prescribed drugs. Check with your doctor to rule out any interactions as CBD may increase or decrease the effects of the medications.

While CBD can be used with a wide range of medicines without any issue or problem, some of the common medications that shouldn’t be used alongside CBD usage include steroids, fentanyl, calcium channel blockers, macrolide antibiotics and HIV antivirals.

Mixing alcohol with CBD

Mixing alcohol with CBD should be approached with caution. As with mixing any medication, there can be adverse side effects depending on the quantity of alcohol and CBD administered.

There are few report of any side effects while mixing CBD with alcohol, for more information click on whether you should combine the two and some delicious CBD cocktails recipes (virgin cocktails too) click HERE

Pregnant, lactating women and children

At present, there is a lack of research regarding the safety of CBD use for pregnant and lactating women, please always consult with your doctor before use. Studies show that THC can interrupt the formation of neuronal networks and result in nervous system-related birth defects.

Parents sometimes use commercially manufactured CBD to treat some conditions in children, such as anxiety and hyperactivity. Caregivers may also use it for children on the autism spectrum to try to reduce certain symptoms of autism. However, this should be discussed with your doctor, especially if other prescribed medication is being taken.


Whilst side effects from CBD may be rare, everyone is different and some things just do not agree with our bodies. If in doubt, reduce the dosage or stop taking CBD completely. Your body could also be reacting to a certain type of CBD, Isolate, broad and full spectrum CBD all have different benefits and can be useful for targeting specific aliments.

For further information on how the benefits of CBD could help you, visit our Benefits of CBD page

Disclaimer from CBD Guide UK

CBD is sold as a food supplement, and as a result, It’s illegal to claim it treats, prevents, or helps cure an illness or disease. No health claims have been made in this article.