An adverse event (AE) was any untoward medical occurrence in a clinical study patient, temporally associated with the use of study drug, whether or not considered related to the study drug. A serious adverse event was any untoward medical occurrence that, at any dose, results in death, is life threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or any other event that requires scientific judgment.

Safety Analysis Set

Vital parameters including heart rate, respiration rate, blood pressure, and body temperature were measured in seated position for at least 5 minutes.

Safety Analysis Set

Physical examinations included a full physical evaluation of body systems including: General appearance, head (eyes, ears, nose, and throat), cardiovascular, respiratory, gastrointestinal, genitourinary, musculoskeletal, endocrine/metabolic, hematologic/lymphatic, skin, and other systems as appropriate.

Safety Analysis Set

Neurological examinations included an evaluation of: Cranial nerves, motor exam, sensory exam, reflexes, coordination/cerebellar

Safety Analysis Set

Developmental examinations (applicable only to pediatric participants 1 to 17 years of age, inclusive) included an evaluation of speech/language, motor skills, and social skills

Safety Analysis Set. Only pediatric participants of 1 to 17 years of age were analyzed.

Twelve-lead ECGs were performed by the physician using an ECG machine that automatically calculates the heart rate and measure PR, QRS, QT and QTc intervals.

Safety Analysis Set

Blood samples were collected for the analysis of hematology parameters: hemoglobin, hematocrit, erythrocytes, thrombocytes (platelet count). Differential blood counts, including basophils, eosinophils, neutrophils, lymphocytes, and monocytes

Safety Analysis Set

Blood samples were collected for the analysis of chemistry parameters: blood urea nitrogen (BUN), potassium, alanine aminotransferase (ALT), alkaline phosphatase (ALP)/serum glutamic pyruvic transaminase (SGPT), total bilirubin, creatinine, sodium, aspartate aminotransferase (AST)/serum glutamic oxaloacetic (SGOT), total protein, fasting blood glucose, calcium, carbon dioxide, estimated glomerular filtration rate (eGFR), and chloride

Safety Analysis Set

Urine samples were collected for the analysis of urinalysis parameters: Specific gravity, color, clarity, pH, glucose, protein, blood, nitrite, protein, ketones, bilirubin, urobilinogen, nitrite, leukocyte esterase by dipstick, and microscopic examination (if blood or protein was abnormal)

Safety Analysis Set

The C-SSRS is a clinician administered assessment tool that evaluates suicidal ideation and behavior. Number of participants that have an affirmative response to the 5 items for suicidal ideation (1. Wish to be dead, 2. Non-specific active suicidal thoughts, 3. Active suicidal ideation with any methods (not plan) without intent to act, 4. Active suicidal ideation with some intent to act, without specific plan, 5. Active suicidal ideation with specific plan and intent) and/or to the 5 items for suicidal behavior (1. Preparatory acts or behavior, 2. Aborted attempt, 3. Interrupted attempt, 4. Actual attempt, 5. Completed suicide) will be reported. The score ranges from 1 to 5 and higher scores indicate worse symptoms.

Safety Analysis Set. Only those participants with data available at specified timepoints have been analyzed

Seizure frequency will be calculated as the total number of seizures divided by the number of days with seizure data, multiplied by 28. Percent change from baseline in 28-day frequency was calculated for each participant by subtracting Baseline 28-day seizure frequency from post-Baseline 28-day seizure frequency, whole divided by Baseline 28-day seizure frequency and multiplied by 100.

Intent to Treat comprised all participants who received at least 1 dose of the IP. Only those participants with data available at specified timepoints have been analyzed.