You wouldn't be able to tell I use drugs. I'm entirely too preppy. Most of the clothes in my closet come from J. Crew. That's partly because I like them, and partly because I don't want to be perceived as someone who is a druggie. It's a conscious decision on my part. Now, when I'm fucked up (it depends on the drug), you can tell. And, I'm generally more open about my drug use when my inhibitions are lowered. But, most of the time, I'm pretty straight in terms of appearance. I shave regularly, take great care of my skin and hair (yeah, I know I sound gay), dress nicely, am a neat freak, etc. Plus, I maintain a full-time job, drive a great car, and live in a really cool historic neighborhood. I don't mean to imply that people who use drugs can't have all of that, because I use and I do. It's just that people don't perceive people who use drugs as being able to maintain that. Don't get me wrong, I've done my fair share of stints where I got so fucked up it's gotten me into trouble, but I really prefer to do things that I can control. For instance, I can really function quite well on opiates. I'm coherent, sober acting, so much so that I went to class several times high on opiates my senior year in college. The only way you would have known would have been to see my pinpoint pupils. That's always a dead give away for those who know to look for that sort of thing. And, of course, the trick is to get high without nodding off, which is sort of a fine distinction to make. But, to answer the question simply, no, you can't tell.