While hyperactivity in ADHD is usually treatable with stimulants and therapy, hyperactivity in autism is not. That's because many of the "hyperactive" behaviors seen in autism are actually self-calming behaviors that help people with autism regulate their response to the world around them. It may not be necessary to treat such behaviors at all. But if they become a serious issue they are usually treated through sensory integration therapy and, in some cases, behavioral therapy.