Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder involving inattention, hyperactivity and impulsivity, which starts in childhood and frequently persists into adulthood. ADHD in adults is commonly comorbid with bipolar disorder (bipolar) or psychosis. Stimulant and non-stimulant medication are the mainstay of treatment for ADHD in adults. The National Institute of Health and Care Evidence (NICE) ADHD guidelines recommend stimulants (Lisdexamfetamine or Methlphenidate) as first line indicators, as they are more effective then the non-stimulant Atomoxetine. NICE note an absence of data from randomised controlled trials (RCT) on the longer term effects of ADHD medications.