Naloxone wears off after about 30 - 90 minutes. After that time, an overdose victim is in danger of falling back into the overdose. So it's really important that you call 911 and make sure the overdose victim gets to the hospital or to professional medical evaluation.

Stay with them and on the phone with 911 until help arrives. 

We highly recommend getting training to administer naloxone. It's online and it's free. You can read more about Narcan nasal spray or the Evzio auto-injector.

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