What if you could save someone from an overdose?

In the face of an escalating opioid epidemic, the F.D.A. recently approved over-the-counter sales for Narcan — a lifesaving nasal spray that can reverse an opioid overdose.Jan Hoffman, who covers health law for The Times, explains why the new availability of Narcan could change the trajectory of the epidemic. The episode recounts early days of the grass roots harm reduction movement. "One of the leaders of the movement, a guy named Dan Bigg of the Chicago Recovery Alliance, had the idea to also give naloxone."