This is kind of a strange question. I personally do not do any drugs, but my roommate does all the time. I don't really approve and I've mentioned this to him, but he does it all the time anyway so I've learned to deal with it and try not to be there when he does it. I was wondering if med schools require drug tests prior to matriculation? If they do, would it be possible for drugs to show up in my system from being around people doing it? Any info would be appreciated.