Adult Attention Deficit Hyperactivity Disorder (ADHD) is a relatively common, often unrecognized condition. It affects % of U.S. adults, but most adults with ADHD live with the symptoms. Adults with ADHD may have difficulty following directions, remembering information, concentrating, organizing tasks, or completing work within time limits. WebMD describes what adult life with ADHD involves, including treatments and ways to manage it. Explore information on Attention Deficit Hyperactivity Disorder (ADHD), including signs and symptoms, treatment, current science, and clinical trials.