Heaton JD, et al. – Given the ever-growing uptick in the number of heroin overdose visits to emergency departments, researchers performed a chart review of all patients who presented with any opioid-related complaint to assess whether a 2-hour observation period is safe for heroin overdose patients who receive naloxone. They identified 806 visits to the emergency department for heroin use after receiving naloxone between 2009 and 2014. They noted a 2-hour intervention rate of 4.6% (N=37) that decreased to 1.9% (N=15) after 3 hours, and 0.9% (N=7) after 4 h. Findings revealed a delayed intervention rate of 5% in correlation to a 2-hour emergency department observation period for heroin overdose patients reversed with naloxone. A possible consideration could be given to a 3-hour observation period, with extra scrutiny in polysubstance abuse.