Heroin use continues to drive opioid-related overdoses and mortality globally (Degenhardt & Hall, 2012). Not-as-prescribed use of prescription opioids increases the number of victims of this epidemic (Logan, Liu, Paulozzi, Zhang, & Jones, 2013). Naloxone has been shown to reduce mortality in overdose among people who use heroin and other opioids; however, its administration in a number of countries, including Ireland, is limited to paramedics and health professionals (Bury, 2015), despite proven effectiveness of overdose education and naloxone distribution (OEND) pro- grammes by trained lay-people worldwide (McAuley, Aucott, & Matheson, 2015).

The effectiveness of these programmes has been demonstrated around outcomes such as knowledge, skills, attitudes and reduced overdose deaths (Coffin & Sullivan, 2013), and involved groups including social workers and needle-exchange staff as well as family and friends of people who use opioids (Walley et al., 2013). While recent systematic reviews have demonstrated the efficacy and feasibility of training diverse groups in OEND (Behar, Santos, Wheeler, Rowe, & Coffin, 2015), the potential and capacity of general practice (GP), to contribute in this area have not been fully characterised (Nielsen & Van Hout, 2016).