This Guide focuses on the use of Medically assisted treatment (MAT) in jails, prisons, and the re-entry process, when justice-involved individuals return to the community. Re-entry may occur through the parole system or other mechanisms for releasing individuals from custody with ongoing conditions for supervision and treatment. 

1. Issue brief Overview of what is happening in the field. This chapter covers challenges to implementing MAT programs. It provides descriptions of approaches being used in the field.
2. What research tells us Current evidence on effectiveness of programs and practices to address use of MAT in criminal justice settings.
3. Examples of medication-assisted treatment programs in criminal justice settings Descriptions of programs that use MAT in criminal justice settings.
4. Addressing challenges to implementing evidence-based practices and programs in criminal justice settings Practical information to consider when selecting and implementing programs and practices to address use of MAT in criminal justice settings.
5. Resources to support effective use of medication-assisted treatment in criminal justice settings Guidance and resources for implementing evidence-based programs and practices, monitoring outcomes, and improving quality.