Project Summary: As referenced in the National Institute on Drug Abuse’s Principles of Effective Treatment, “Addiction is a complex but treatable disease that affects brain function and behavior. Drugs of abuse alter the brain’s structure and function, resulting in changes that persist long after drug use has ceased. This may explain why drug abusers are at risk for relapse even after long periods of abstinence and despite the potentially devastating consequences.” Source: National Institute on Drug Abuse, Principles of Drug Addiction Treatment: A Research-Based Guide (3rd ed.). 2018. Principles of Effective Treatment https://www.drugabuse.gov/publications/principles-drug-addiction-treatment-research-based-guide-third-edition/principles-effective-treatment In diverse populations, with justice-involved individuals, these effects can prove challenging to address. It is important to examine the effects of substance abuse and addiction on these populations.