(CNN) — About 1 in every 10 people in the US who uses Adderall or similar combination drugs to treat attention-deficit/hyperactivity disorder (ADHD) has been affected by an ongoing shortage, a new analysis suggests. The US Food and Drug Administration announced that Adderall was in shortage in mid-October 2022, and the share of people with ADHD who filled their prescriptions for Adderall and related medications plunged in the following months.