An opioid overdose can be reversed with the drug naloxone when given right away.
What is naloxone?
Naloxone is a medication designed to rapidly reverse an opioid overdose. 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 fentanyl, heroin, or prescription opioid pain medications. Naloxone is not effective in treating overdoses of methamphetamine or cocaine.