7. Subjects must not have taken any medication for the treatment of ADHD or DBD for either 5 half-lives of the medication or 28 days (whichever is less) at Visit 1. If subjects are currently taking medications for the treatment of ADHD or DBD, the assent and consent must be reviewed and signed by the subject and parent/legal guardians (Visit 0) before the physician investigator will provide a tapering schedule for current medications.