Highlights Deaths from opioid overdose can be prevented by prompt administration of naloxone It has been 20 years since take-home naloxone provision was first proposed Take-home naloxone programs have recently overcome legal barriers in many countries Take-home naloxone provision remains low compared to evident growing clinical need The 'opt-out' model of required pre-provision may achieve wider naloxone coverage Abstract Background: Opioid overdose is a major cause of mortality, but injury and fatal outcomes can be prevented by timely administration of the opioid antagonist naloxone. Pre-provision of naloxone to opioid users and family members (take-home naloxone, THN) was first proposed in 1996, and WHO Guidelines were issued in 2014. While widespread in some countries, THN is minimally available or absent elsewhere. This review traces the development of THN over twenty years, from speculative harm reduction proposal to public health strategy.Method: Medline and PsycINFO were searched for peer-reviewed literature using Boolean queries: 1) "naloxone OR Narcan"; 2) "(opioid OR opiate) AND overdose AND prevention". Grey literature and specialist websites were also searched. Data were extracted and synthesized as narrative review, with key events presented as chronological timeline.
Results
Conclusions:Framed as a public health tool for harm reduction, THN has overcome social, clinical, and legal barriers in many jurisdictions. Nonetheless, the rising death toll of opioid overdose illustrates that current THN coverage is insufficient, and greater public investment in overdose prevention will be required if THN is to achieve its full potential impact.