Currently Recruiting Studies A Phase 4, Randomized, Double-Blind, Multicenter, Placebo-Controlled, Parallel-Group Study of the Efficacy and Safety of SPN 812 in Preschool-Age Children (4 to 5 years old) with Attention-Deficit/Hyperactivity Disorder (ADHD) Adolescent Changes in Brain and Behavior in Boys and Girls with ADHD Executive Functions in Reading Multimodal brain imaging of the neural effects of methylphenidate in patients with ADHD Understanding Motor Movement in Children With and Without ADHD