Naloxone is a medication designed to reverse the effect of opioid overdose.

According to the National Institute on Drug Abuse, “It is an opioid antagonist—meaning that it binds to opioid receptors and can reverse and block the effects of other opioids. It can very quickly restore normal respiration to a person whose breathing has slowed or stopped as a result of overdosing with heroin or prescription opioid pain medications.”

Even after being given naloxone, recipients need to be examined by medical personnel.