The following serious adverse reactions are described below and elsewhere in the labeling: Suicidal Behavior and Ideation Dizziness and Ataxia Cardiac Rhythm and Conduction Abnormalities Syncope Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)/Multiorgan Hypersensitivity Reactions Adjunctive therapy: Most common adverse reactions in adults (≥10% and greater than placebo) are diplopia, headache, dizziness, nausea, and somnolence. Monotherapy: Most common adverse reactions are similar to those seen in adjunctive therapy studies. Pediatric patients: Adverse reactions are similar to those seen in adult patients