My family has been addicted to drugs all my life. Almost every single family member has had trouble with addiction in all kinds of drugs. For example my grandma smokes a pack of cigarettes every day and drinks a 12 pack of beer every day. Same story but with different drugs for many of my other family members.
Thus I don't do any drugs at all. That doesn't mean I have escaped addiction though. I have been addicted to the natural dopamine before. This has included simple things like over 400 days /played on World of Warcraft or even a simple caffeine addiction.
I can break addiction by challenging myself, if I have to prove something to myself then I will.