AR08 for Treatment of ADHD in Children

Inclusion Criteria: 1. Meets DSM-IV-TR criteria for a primary diagnosis of ADHD based on structured clinical interview, MINI-KID, as assessed by the Investigator 2. Minimum score of 28 on the ADHD-RS-IV at Baseline 3. Male or female ages 6 - 17 years, inclusive, at the time of Screening 4. Weighs ≥21 kg (46 pounds). 5. Is functioning at age appropriate levels intellectually, as deemed by the Investigator. Exclusion Criteria: 1. Has a comorbid psychiatric diagnosis (comorbid psychiatric diagnosis will be established by the MINI-KID interview). 2. Has a positive response to either question 4 or 5 of the Baseline /Screening version of the pediatric Columbia Suicide Severity Rating Scale (C-SSRS) 3. History of daily usage (at least 28 days/month) of either anti-hypertensive or prophylactic anti-migraine medications prior to Screening 4. Current usage of medications known to cause QTc prolongation or ADHD medications.