Study to Assess the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Neurobehavioral Disinhibition Including Aggression, Agitation, and Irritability in Participants With Traumatic Brain Injury

Inclusion Criteria: * Participants with TBI * Participants with neurobehavioral disinhibition symptoms that are present after trauma or after recovery of consciousness * Score of ≥4 on the mCGI-S scale and the Agitation/Aggression or Irritability/Lability subscales of the Neuropsychiatric Inventory (NPI) scale at screening and baseline * Participants with a reliable caregiver Exclusion Criteria: * Participants with significant symptoms of a major depressive disorder * Participants with a history of or current clinical symptoms of schizophrenia, schizoaffective disorder, bipolar disorder, antisocial personality disorder, or borderline personality disorder