The drug that brings people overdosing on opioids back from the brink of death in minutes just got approved for over-the-counter use. The Wall Street Journal’s Julie Wernau explains why she carries it with her everywhere she goes.This episode was produced by Hady Mawajdeh, edited by Jolie Myers, fact-checked by Laura Bullard, engineered by Paul Robert Mounsey, and hosted by Sean Rameswaram.Transcript at vox.com/todayexplained  Help keep this show and all of Vox's journalism free by making a gift to Vox today: bit.ly/givepodcastsLearn more about your ad choices. Visit podcastchoices.com/adchoices