Aug. 13, 2004 -- A drug already used to treat attention deficit hyperactivity disorder (ADHD) in children has now been approved for adults.
Researchers estimate that more than 8 million American adults may have symptoms of ADHD, such as inattention and impulsivity, but only about 600,000 are taking medication for the condition.
FDA Approves Adderall XR for Adults
The FDA based its approval on information from a four-week trial of Adderall XR in 248 adults. The results showed that a once-a-day dose of the drug provided benefits in reducing ADHD symptoms starting a week after treatment began and throughout the course of the study.
At the end of the study, ADHD symptom rating scores were 49% lower among adults who took Adderall compared with their scores at the start of the study.
Adderall's manufacturer, Shire Pharmaceuticals, recently published data on the long-term effects of Adderall XR use in adults, but this evidence has not been evaluated by the FDA.