RecruitingBehavioural interventionEvaluation of a Patient Decision Aid for Emergency Department Initiated BuprenorphineThis study aims to develop and pilot test a patient decision aid (PtDA) for emergency department (ED)-initiated buprenorphine treatment for opioid use disorder (OUD). The PtDA will be evaluated for acceptability, impact on patient knowledge, decisional conflict, and buprenorphine uptake compared to treatment as usual (TAU).