Shire plc (LSE: SHP, NASDAQ: SHPGY), the global specialty biopharmaceutical company, announced findings from a post hoc analysis examining emotional lability from Phase 3 study data with Vyvanse®. In this study, Vyvanse demonstrated significant improvement in Attention-Deficit/Hyperactivity Disorder (ADHD) symptoms as measured by the ADHD Rating Scale IV (ADHD-RS IV) and Connors' Parent Rating Scale-Revised Short (CPRS-RS) in children with ADHD aged 6 to 12 years.