Attention Deficit Hyperactivity Disorder (ADHD), Inattentive Type in Adults. People with ADHD of the inattentive type have trouble paying attention to details, are easily distracted, often have trouble organizing or finishing tasks and often forget routine chores (such . It may make you think of kids who have trouble paying attention or who are hyperactive or impulsive. Adults can have ADHD, too. About 4% to 5% of U.S. adults have it. But few adults get diagnosed.