Background/Objectives: Attention-deficit/hyperactivity disorder (ADHD) begins in childhood, but its presentation changes over time. Adult ADHD is increasingly recognized; in the United States, 2023 survey data indicate that approximately 6% of adults reported a current diagnosis. This narrative review examines the developmental course of ADHD from childhood to adulthood and the controversial phenomenon of apparent late-onset presentations. Broadened diagnostic criteria, greater public awareness,…
