Shire plc (LSE: SHP, NASDAQ: SHPGY, TSX: SHQ) announced that its Attention Deficit Hyperactivity Disorder (ADHD) patch, DAYTRANA tm (methylphenidate transdermal system), has significant efficacy in reducing the symptoms of ADHD in children aged 6 to 12 years, even when the ADHD patch is taken off earlier than the recommended nine hours. The ability to remove the patch earlier than the recommended nine-hour wear time allows physicians the opportunity to manage the potential for late-day side effects, such as lack of appetite or difficulty sleeping. These phase IIIb clinical trial results were reported today at a major scientific and educational meeting of child and adolescent psychiatrists in San Diego, Calif.