Narcan is a short acting form of the anti addiction drug Naltrexone...an opiod antagonist....in fact the directions for Naltrexone warn DO NOT take if you are not clean from opiates and are still addicted as SEVERE withdrawal symptoms will occur....that's with slow acting Naltrexone....Narcan is fast acting...it should only be administered in ACUTE overdose...however...if the person is a habitual user of opiods....Naloxone(the active medication in Naltrexone and Narcan) can cause SEVERE withdrawal symptoms including death...with a person with previous heart or respiratory problems...throwing them into acute withdrawal with an opiod antagonist can EASILY cause death....Narcan is an opiod antagonist...so is Naltrexone...DO NOT ADMINISTER IT TO AN OPIOD ADDICT!!!!!!!!!! It will initiate ALL withdrawal symptoms immediately
I had a mild addiction to heroin back in my high school days, only smoked, never touched a needle, for about a year and a half, got annoyed by it and decided to put a stop to it, withdrawal were the worst experiences i ever had in my life and too much money burned for it when i could've used them for a lot of other stuff...
They gave me Narcan to clean my system, when i was starting to go into withdrawal, fell asleep... Woke up after a few hours, took a long piss, felt ok...