Absolutely I was addicted for years. A lot of friends from high school who smoked all these years are now bipolar, I think it's related. My uncle smoked for years too, then he had a stroke last year just a couple of months after finishing a triathalon. He can no longer smoke marijuana because it affects his heart rate. The main withdrawal issue tho is upset stomach/lack of appetite. It's a lot more harmful to one's health than people think. If you have to compare your drug to meth or heroin to make it look better then you know there is a problem lol.