Overview Long-Duration Stimulant Treatment Study of ADHD in Young Children Status: Completed Trial end date: 2008-03-01 Target enrollment: Participant gender: Summary This study will evaluate if Ritalin LA™ is safe and effective for ADHD treatment in 4-to-5-year olds. Phase: Phase 4 Details Lead Sponsor: New York State Psychiatric InstituteTreatments: Methylphenidate