BACKGROUND: Studies have reported a high prevalence of substance misuse among people who use drugs (PWUD) in contact with the Criminal Justice System (CJS) in Nigeria. Further, there is limited access to treatment resulting in high rates of relapse and recidivism. The development of Alternatives to Incarceration (ATI) is one effort to address these gaps. This paper report findings from the pilot training on ATI in Nigeria. AIMS: The aims of this study were to (1) consider the feasibility of implementing ATI in Nigeria; (2) determine whether the programme was delivered as designed; (3)...