Naloxone Administration in US Emergency Departments, 2000-2011.

Rates of opioid overdose and opioid-related emergency department (ED) visits have increased dramatically. Naloxone is an effective antidote to potentially fatal opioid overdose, but little is known about naloxone administration in ED settings. We examined trends and correlates of naloxone administration in ED visits nationally from 2000 to 2011. Using data from the National Hospital Ambulatory Medical Care Survey, we examined ED visits involving (1) the administration of naloxone or (2) a diagnosis of opioid overdose, abuse, or dependence. We assessed patient characteristics in these visits, including concomitant administration of prescription opioid medications. We used logistic regression to identify correlates of naloxone administration. From 2000 to 2011, naloxone was administered in an estimated 1.7 million adult ED visits nationally; 19 % of these visits recorded a diagnosis of opioid overdose, abuse, or dependence. An estimated 2.9 million adult ED visits were related to opioid overdose, abuse, or dependence; 11 % of these visits involved naloxone administration. In multivariable logistic regression models, patient age, race, and insurance and non-rural facility location were independently associated with naloxone administration. An opioid medication was provided in 14 % of visits involving naloxone administration. Naloxone was administered in a minority of ED visits related to opioid overdose, abuse, or dependence. Among all ED visits involving naloxone administration, prescription opioids were also provided in one in seven visits. Further work should explore the provider decision-making in the management of opioid overdose in ED settings and examine patient outcomes following these visits.