 In this survey of 82 street-recruited IDU's who had experienced one or more heroin overdose events, 51% reported soliciting emergency assistance, 87% were in favor of participating in an overdose training program, "35% predicted they would feel comfortable using greater amounts of heroin if they had narcan in their possession, 62% would be less inclined to call 911 for an overdose, 30% would leave an overdose victim after naloxone resuscitation," and 46% might not be able to dissuade the victim from using heroin again to alleviate withdrawal symptoms induced by naloxone.Another article published by van Dorp, raised concerns that i) "the induction of an acute withdrawal syndrome (the occurrence of vomiting and aspiration is potentially life threatening)" – and that could lead to abandonment by a narcan provider/friend; ii) "the effect of naloxone may wear off prematurely when used for treatment of opioid-induced respiratory depression and require multiple doses and long-term vigilance".