Addressing the complex substance use and mental health needs of people leaving prison: Insights from developing a national inventory of services in Canada.

Internationally, transitions from prison to the community are often precarious experiences for people who are living with substance use and mental health concerns. In Canada, a continuing opioid overdose crisis and overlapping challenges related to the COVID-19 pandemic have generated urgency for scaling up community-based services that can meet the complex substance use and mental health needs of people leaving prison. In this commentary, we reflect on our experience with and knowledge gained by developing a national inventory of substance use and mental health services for criminal justice-involved persons who are re-entering the community. We learned that there is a scarcity of such community-based services specific to criminal justice-involved populations and a glaring lack of information about culturally safe and appropriate supports. Stakeholders from organisations across Canada identified that communities need a comprehensive array of low-barrier services, inclusive of harm reduction and substance use treatment services, to meet the diverse needs of people leaving prison. We recommend building greater investment in and awareness of community-driven, local programs, as well as enhancing efforts to engage people with lived and living experience in service design and provision. We also briefly describe a few programs to highlight examples of how to operationalise the themes that we observed to emerge while developing a national inventory of community-based substance use and mental health services for criminal justice-involved persons.