Cannabidiol Oral Solution as an Adjunctive Treatment for Treatment-resistant Seizure Disorder

An Adverse Event (AE) is any untoward medical occurrence in a subject administered a pharmaceutical product. It does not necessarily have a causal relationship with this treatment.

A serious adverse event is any untoward medical occurrence ( whether considered to be related to investigational product or not) that at any dose results in death, is life threatening, requires inpatient hospitalization, results in disability/incapacity, is a congenital abnormality/ birth defect, or medically significant as determined by an investigator.

Laboratory values include chemistry and hematology, and urinary analysis.

The Vineland Adaptive Behavior Scales measures the personal and social skills of individuals from birth through adulthood. Because adaptive behavior refers to an individual's typical performance of the day-to-day activities required for personal and social sufficiency, these scales assess what a person actually does, rather than what he or she is able to do.

The Vineland Adaptive Behavior Scales, Second Edition (Survey Interview Form) is a measure of adaptive behavior in children, adolescents and adults. It yields an overall standard score (Adaptive Behavior Composite, ABC) and age standard scores in four domains. The 4 domains are Communication, Daily Living Skills, Motor Skills, and Maladaptive Behaviour Index. ABC scores have a mean of 100 and a standard deviation of 15 (range = 20 to 160). Higher scores suggest a higher level of adaptive functioning. A rise in standard scores from Baseline indicates improvement.

The VABS will be completed for all participants.

For subjects 7 years of developmental age or older, the Columbia-Suicide Severity Rating Scale (C-SSRS) will be administered to access suicidality. The appropriate adult version will be used in subjects 12 years of (developmental) age and older. The investigator will determine the participant's developmental age.

The severity of the participant's illness is rated on a seven-point scale, where 1=normal, not at all ill, and 7=among the most extremely ill patients. This rating is based upon observed and reported symptoms, behavior, and function in the past seven days. The score reflects the average severity level across the seven days.

The CGI-S will be completed for all participants, regardless of chronological and developmental age.

The IPES assesses the impact on academic achievement, participation in activities, health, relationships with family and with peers and siblings, social activities, self-esteem, and the caregiver's hopes for their child's future. It takes about 3 minutes for the parent to complete. Each of the 11 items is given a severity score of 0 (not at all) to 3 (a lot). The higher the score, the higher is the impact of epilepsy on that item. The highest total score possible is 33 (range 0-33).

The Impact of Pediatric Epilepsy Scale (IPES) is validated for subjects who are 2 to 16 years of age. Due to developmental delay characteristic of the study population, subjects through 18 years of chronological age will complete the IPES. Subjects over 18 years of chronological age will not complete the IPES.

The participant's overall clinical condition is compared to the one week period just before the start of medication (the baseline visit). The participant's condition is compared to the patient's condition at admission to the project [prior to starting treatment] on a 7-point scale, where 1=very much improved since the initiation of treatment; and 7=very much worse since the initiation of treatment.

The CGI-I will be completed for all participants, regardless of chronological and developmental age.