He is absolutely powerless over his addictions. It will be a battle he must face for the rest of his life. I wish him, and all others who battle addictions, peace and personal acceptace.
Marijuana causes zero chemical dependency. It is not an addictive substance.
Maybe I should tell that to all the addicts that tell me marijuana is the one drug they have not been able to stop. I used to lead a addictions and mental health group as part of my job. Did it for about 9 years.
Cigarettes (nicotine) are traditionally the one drug that addicts don't stop -- they are legal, and according to the serious addicts I've known, even harder to quit than heroin. Addicts who've kicked heroin, cocaine or alcohol might still smoke pot because they crave something, and pot is far less destructive. So that's a psychological addiction, not physical. Doesn't mean it's not going to screw up your health or your family or your work life, but the need to constantly check out of your brain is the problem, not the drug itself.