Economic Impact of Illicit Drug Use on American Society. This 2011 online publication is from the folks at the Justice Department, and provides a wealth of detail on the societal impact of drug use. This is an expanded edition of their annual National Drug Threat Assessment report.
We do have a VHS copy of Reefer Madness by the way, and it is also viewable online. Our catalog will reveal many other items on drug use and abuse, and Academic Search Complete would be a great starting point for finding articles on these issues. Don't forget CQ Researcher for informative reports on drug use, legalization of drugs and so forth.