Substance Abuse and Mental Health Services Administration (SAMHSA) Office of Applied Studies http://www.oas.samhsa.gov/
Provides the latest national data on substance abuse, drug related emergency department episodes and medical examiner cases, and the nation's substance treatment system.
Analysis of Substance Abuse and Treatment Need Issues (May 2002)
Examines the association between drug use (marijuana and cocaine) and self-reported mental/behavioral problems, including depression and loneliness. See Part III: Health and Other Problems Associated with Drug Use, Chapters 5 and 6.
The National Clearinghouse for Alcohol and Drug Information http://www.health.org/
A resource for information about substance abuse prevention and treatment.
The National Alliance for the Mentally Ill (NAMI) http://www.nami.org/
A nonprofit organization that acts as a source for information on all aspects of mental illness.