The mental health startup Cerebral benefited from pandemic-era changes to federal telehealth laws. But its easy-to-get prescriptions for tightly regulated stimulants — heavily promoted on social media — have sparked a Department of Justice investigation. This episode was produced by Tori Dominguez, edited by Matt Collette, fact-checked by Laura Bullard, engineered by Paul Mounsey, and hosted by Sean Rameswaram. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices