“…In first in-human trials, nasal naloxone was found to elicit withdrawal symptoms in opioid-dependent volunteers (Loimer et al, 1992(Loimer et al, , 1994. Since the early 2000s, nasal naloxone has been used off-label by ambulance personnel (Barton et al, 2005(Barton et al, , 2002Belz et al, 2006;Kelly et al, 2005;Kerr et al, 2009;Merlin et al, 2010;Robertson et al, 2009;Weber et al, 2012) and in the emergency department (Sabzghabaee et al, 2014). More recently, improvised nasal kits (consisting of a prefilled naloxone syringe and an atomizer which fits onto the syringe to generate a nasal spray) have been provided to opioid users, peers, and families in take-home naloxone trials (Doe-Simkins et al, 2009;Dwyer et al, 2015;Walley et al, 2013aWalley et al, , 2013b, and succesful overdose reversals using improvised nasal kits have also been reported for police first responders (Rando et al, 2015).…”