RecruitingBehavioural interventionBehavioral Safety and Fentanyl Education: BSAFEBSAFE is a randomized trial of a repeated-dose brief intervention to reduce overdose and risk behaviors among people who use stimulants who may have unintentional fentanyl use (UFU). It includes an established overdose education curriculum within an Informational-Motivation-Behavior (IMB) model. This study will test the efficacy of BSAFE vs attention-control.