The National Center on Addiction and Substance Abuse
http://www.casacolumbia.org/
National Institute of Mental Health
http://www.nimh.nih.gov/
Partnership for a Drug-Free America
http://www.drugfreeamerica.org
Substance Abuse and Mental Health Services Administration (SAMHSA)
http://www.samhsa.gov
National Clearinghouse for Drug and Alcohol Information
http://www.health.org