Randomized, Double-Blind Trial of Guanfacine Extended Release in Children With Attention-Deficit/Hyperactivity Disorder: Morning or Evening Administration

Clinical trial registration information-Tolerability and Efficacy of AM and PM Once Daily Dosing With Extended-release Guanfacine Hydrochloride in Children 6-12 With Attention-Deficit/Hyperactivity Disorder (ADHD) (The ADHD Tempo Study); http://clinicaltrials.gov/; NCT00997984.