One year later, where's all the Adderall?

It’s not unusual for a drug shortage to last more than a year, but there’s usually a pretty clear reason. The Adderall shortage, meanwhile—which hit the one-year mark last week—remains a mystery. The U.S. Food and Drug Administration (FDA) has shared little information with the millions of Americans who have struggled to access the common ADHD treatment. Experts who have spent their careers studying shortages are “baffled.”

As it turns out, there might not be a single person who actually knows what’s causing the Adderall shortage. Lawmakers say that’s because the three parties that work together to get the medication bottled and sold aren’t required to communicate enough with one another—and nobody wants to accept the blame. Here’s who’s involved:

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