The percentage of adult patients (18 years of age or older) with a diagnosis of ADHD who show a reduction in symptoms of 25% on the Adult ADHD Self-Report Scale (ASRS-v1.1)- 18 item self-report scale of ADHD symptoms within 2 to 10months after initially reporting significant symptoms. There are two aspects to this measure. The first is the assessment of the use of the ASRS v.1. during the denominator identification period (Criteria 1 also referred to as Time 1) and the second is the assessment of improvement in the ASRS v.1.1 from the first administration to the second administration of the ASRS v.1.1 (Criteria 2 also referred to as Time 2).