http://www.avert.org/ - This web site is produced by AVERT and contains HIV and AIDS statistics, information for young people, personal stories, a history section, information on becoming infected, a young and gay section, free resources, and lots more.

http://www.avert.org/druguse.htm

Office of National Drug Policy - The U.S. Drug Policy site http://www.whitehousedrugpolicy.gov/

National Institute on Drug Abuse 
http://www.nida.nih.gov/ - use the drop down
"Select Drug Name" toward the upper right side

Substance Abuse and Mental Health Services Administration Statistics  http://www.samhsa.gov/statistics/statistics.html

Substance Abuse and Mental Health Services Administration - HomePage  http://www.samhsa.gov/