I've always heard that meth is one of those drugs that once you do it one time, you keep going back for more. And I've seen it absolutely destroy people before. I have a friend who is not really prone to substance abuse (he's tried coke, smokes pot occasionally, drinks occasionally, has dabbled with pain killers, adderall, etc, but never more than a few times over the course of several years). He's become fixated on wanting to try meth and that's the one that really scares me. If he likes it, I'm afraid he'll almost certainly go back for more. So just how addictive is it? Can it be a one time sorta thing if you're not the type who gets hooked on things easily?