Welcome to Cancer Chat Jimisin.

I'm nor sure where you got this cannabis oil from but we would advise against using any black market or home-made preparations of cannabis oil. Not only is it illegal, but because it’s unregulated these products might be contaminated with harmful substances and vary in strength.

It could potentially interfere with other cancer treatments that the doctor has given to your friend, as well as carry other side effects and risks, so it would be advisable for your friend to make their medical team aware they have been taking this if they haven't done so already.

I'm not sure if you've come across this already but the latest rules and regulations regarding medicinal cannabis in the UK can be found just here.

Kind regards, 

Steph, Cancer Chat Moderator