Naloxone

Naloxone is a drug used to counter the effects of opioid overdose, for example heroin and morphine overdose. Specifically, naloxone is used in opioid overdoses for countering life-threatening depression of the central nervous system and respiratory system. It is marketed under trade names including Narcan, Nalone, and Narcanti and has sometimes been mistakenly called "naltrexate." It is also not to be confused with Naltrexone, another opioid antagonist that has qualitatively different effects.