Following the initial evidence supporting DBT for suicide and non-suicidal self-injury (NSSI) in the early 1990s, Marsha Linehan and colleagues introduced modifications to target substance use disorders (SUD) as one of the greatest risk factors for fatal outcomes. DBT-SUD developed by adding new principles, strategies, protocols, and modalities to address common problems and complications of addiction, while maintaining all of those from the original model for NSSI.