There are many excellent websites from the federal government and others on drug and alcohol abuse as well as other forms of addiction.
The National Clearinghouse for Alcohol and Drug Information (NCADI) from the U.S. Department of Health and Human Services and the Substance Abuse and Mental Health Services Administration (SAMHSA).
"NIDA's mission is to lead the Nation in bringing the power of science to bear on drug abuse and addiction." The site contains research reports, fact sheets, and lots of free information.
For statistics to support research about about substance abuse, the National Criminal Justice Reference Service of the U.S. Department of Justice is an excellent resource.
Check out research being conducted at The Habits Lab at the University of Maryland, Baltimore County.
Before using information from the Internet in academic and work-related settings, it is important to evaluate web pages for accuracy, relevancy, authorship, timeliness and quality.