what drugs does narcan reverse
In this article. A medication called naloxone can reverse the effects of an overdose of heroin or some types of painkillers. Paramedics and emergency room doctors have used it for years to save lives.aloxone blocks the effects of drugs made from opium, or opioids. These include: 1  heroin. 2  morphine. 3  oxycodone. 4  methadone. 5  fentanyl. 6  hydrocodone. 7  codeine. 8  hydromorphone.