Journal of Attention Disorders, Ahead of Print.
Objective:To compare PRC-063 (multilayer-release methylphenidate) and lisdexamfetamine dimesylate (LDX) on the driving performance of young adults with attention deficit hyperactivity disorder (ADHD) in a randomized, double-blind, crossover study.Method:Following up to 21 days of each treatment in each treatment course (PRC-063/LDX or LDX/PRC-063), subjects completed a 15-hour driving simulator laboratory assessment. The primary outcome measure was the Tactical Driving Quotient (TDQ) and the Clinical Global Impressions-Improvement (CGI-I) scale was a secondary outcome measure.Results:Forty-four subjects completed the study. PRC-063 and LDX had equivalent effects on driving performance through a 15-hour time period (least square mean difference −0.3 [standard error 1.08], 95% confidence interval [−2.4, 1.8], p = .793). Consistent improvement in CGI-I was observed. The incidence of treatment-emergent adverse events was similar for each treatment sequence.Conclusions:PRC-063 and LDX had comparable effects on driving performance, from 1 through 15 hours, the last time point measured.