Extended-release methylphenidate monotherapy in patients with comorbid social anxiety disorder and adult attention-deficit/hyperactivity disorder: retrospective case series.

Background: The relationship between social anxiety disorder (SAD) and attention-deficit/hyperactivity disorder (ADHD) is a subject which has recently become a topic of interest for research.

Methods: In this study, 20 patients with comorbid SAD and adult ADHD who were treated with extended-release methylphenidate monotherapy were evaluated retrospectively.

Results: Clinical response for both ADHD and SAD symptoms was observed in 17 of 20 patients. Overall, one patient did not respond to treatment and two patients dropped out of treatment at the beginning due to adverse effects.

Conclusion: Extended-release methylphenidate improved both SAD and ADHD symptoms and was generally well tolerated. Further studies are required to investigate the relationship between SAD and ADHD.