The overdose-reversal drug Narcan is displayed during training for employees of the Public Health Management Corporation (PHMC), Dec. 4, 2018, in Philadelphia. The U.S. Food and Drug Administration approved selling overdose antidote naloxone over-the-counter, Wednesday, March 29, 2023, marking the first time a opioid treatment drug will be available without a prescription. (AP Photo/Matt Rourke, File)