Video: Three things to know when using Narcan during an opioid overdose

The Food and Drug Administration (FDA) approved Narcan, 4 milligram (mg) nasal spray for over-the-counter sale. Narcan is a nasal spray version of naloxone, a rescue medicine that can be administered in the event of an opioid drug overdose. The FDA approval will pave the way for the medication to be sold in grocery stores, convenience stores, vending machines and other retail locations without a prescription.