You can trying giving him these links and explain this isn't FDA regulated, which makes it a gamble to smoke. Since these are herbs, I also don't know the long term effects of smoking this, even without the cannabis spray. Since it seems he's addicted to it, this advice you give him might go in one ear and out the other. I'm not advocating marijuana but it would be safer to smoke the real thing. I don't understand how the govern't allows this for sale.

Many states are banning this but unfortunately people can still get it on the internet. Most substance abusers are self medicating so the root of this problem is finding out why does he need to escape his feelings and life. Even marijuana can make some susceptible to mental illness. If he's having this kind of affect, its obvious its not good. A person can also call their local police station and ask them if they plan on getting this banned. I hope he'll agree to stop or get help.