Overview SPD503 (Guanfacine Hydrochloride) in ADHD Plus Oppositional Symptoms Status: Completed Trial end date: 2008-01-04 Target enrollment: Participant gender: Summary To assess efficacy and safety of SPD503(guanfacine hydrochloride) in subjects with ADHD and oppositional symptoms. Phase: Phase 3 Details Lead Sponsor: ShireTreatments: Guanfacine