This research project involves follow-up interviews with participants of the project following their exit from prison when:
1. Their Naloxone dose has been used in an overdose situation and they are seeking a replacement dose;
2. They contact the research team for a follow-up interview after experiencing or witnessing an overdose situation, where Naloxone may or may not have been used; and
3. A time period of 3 and 6 months has elapsed after their attendance at the Naloxone Peer Education Program in Acacia Prison.