Attention-deficit/hyperactivity disorder (ADHD) often presents with psychiatric comorbidities—but how do those conditions differ across the lifespan? In this video, Psych Congress faculty member Timothy Wilens, MD, explores common patterns of ADHD comorbidities throughout different developmental stages. Dr Wilens also highlights how comorbid symptom expression differs by sex, and reviews how these differences may track from early life into adulthood.