PART A: Efficacy and Safety of AEVI-001 in Children and Adolescents With ADHD and With mGluR Mutations

Exclusion Criteria

• •1. Subject or parent/LAR is, in the opinion of the investigator, mentally or legally incapacitated, has significant emotional problems at the time of the Screening Visit (Visit 1) which could interfere with the conduct of study evaluations.
• •2. Subject has a current, controlled or uncontrolled, co-morbid major psychiatric diagnosis (aside from ADHD), including an anxiety disorder, major depression, bipolar disease, schizophrenia (or any psychotic disorder), and moderate or severe intellectual disability. Mild anxiety and/or depressive symptoms that do not meet diagnostic criteria for an anxiety disorder or major depression and/or do not require treatment are not exclusionary.
• •3. Subject has autism spectrum disorder to include a DSM-IV diagnosis of autistic disorder, Asperger's disorder, or pervasive developmental disorder.
• •4. Subject is currently taking any medication that might confound the results of safety assessments conducted in the study.
• •5. Subject has a known history of cardiovascular disease, advanced arteriosclerosis, structural cardiac abnormality, cardiomyopathy, serious heart rhythm abnormalities, coronary artery disease, cardiac conduction problems, exercise-related cardiac events including syncope and pre-syncope, or other serious cardiac problems.
• •6. Subject has any clinically significant abnormality on 12-lead ECG performed at the Screening Visit (Visit 1) and/or the Baseline Visit (Visit 2) such as serious arrhythmia, cardiac conduction problems, or other abnormalities deemed to be a potential safety issue.