Definition for Narcan
From Biology Forums Dictionary
Narcan is an opiate antidote. Opiates include heroin as well as prescription opiates like morphine, codeine, OxyContin, methadone and Vicodin. Narcan is a prescription medicine that blocks the effects of opiates. It cannot be abused or used to get a person high. If given to a person who has not taken opiates it will not have any effect on them.