Do some research on CBD alone, without the THC which is what makes you high. It’s the CBD that has the medicinal effects.
I take it to help manage my chronic pain and anxiety and my husband uses it for his anxiety.
We want our 15 year old to try it, but he doesn’t like the taste.
I don’t know if you are in Canada or not (I am), and it can be medically prescribed. I don’t know how much research you will find in this specifically related to ADHD, etc, but I’m all for trying it with my son in CBD form only.
I hope any of this is helpful.