The Effectiveness of Methylphenidate in the Treatment of Encopresis Independent from Attention-Deficit Hyperactivity Disorder Symptoms

Several medications are reported to be effective in treatment of encopresis. However, mechanisms of action related to these drugs are not known. We report a patient with ADHD and encopresis whose encopretic signs have disappeared with long acting methylphenidate while they have not changed with atomoxetine.