A Trial of Two Fixed Doses of ZX008 (Fenfluramine HCl) in Children and Young Adults With Dravet Syndrome

Key Inclusion Criteria:

• Male or non-pregnant, non-lactating female, age 2 to 18 years, inclusive as of the dayof the Screening Visit.
• Clinical diagnosis of Dravet syndrome, where convulsive seizures are not completelycontrolled by current antiepileptic drugs.
• Must have a minimum # of convulsive seizures per 4-week period for past 12 weeks priorto screening.
• All medications or interventions for epilepsy must be stable for at least 4 weeksprior to screening and expected to remain stable throughout the study.
• No cardiovascular or cardiopulmonary abnormality based on ECHO, ECG or physicalexamination.
• Parent/caregiver is willing and able to be compliant with diary completion, visitschedule and study drug accountability.

Key Exclusion Criteria:

• Pulmonary arterial hypertension.
• Current or past history of cardiovascular or cerebrovascular disease, such as cardiacvalvulopathy, myocardial infarction or stroke.
• Current or past history of glaucoma.
• Moderate or severe hepatic impairment.
• Receiving concomitant therapy with: anorectic agents; monoamine-oxidase inhibitors;medications that act via serotonin including serotonin reuptake inhibitors;atomoxetine, or other centrally-acting noradrenergic agonist; or cyproheptadine.
• Currently receiving or has received stiripentol in the past 21 days prior toScreening.
• Currently taking carbamazepine, oxcarbamazepine, eslicarbazepine, phenobarbital, orphenytoin, or has taken any of these within the past 30 days.
• Positive result on tetrahydrocannabinol (THC) or cannabidiol (CBD) test at theScreening Visit.
• A clinically significant medical condition,that would interfere with studyparticipation, collection of study data, or pose a risk to the subject.