Additional Relevant Details GWPharma has commenced a Phase 3 clinical trial of Epidiolex (cannabidiol or CBD) as an adjunctive therapy for the treatment of seizures associated with Tuberous Sclerosis Complex (TSC), a rare genetic disorder, the most common symptom of which is epilepsy. Epilepsy occurs in around 80-90% of TSC patients and is a significant cause of morbidity and mortality. TSC is the third indication that GW is targeting within its Epidiolex clinical development program, which includes four Phase 3 pivotal trials in Dravet syndrome and Lennox-Gastaut syndrome, both rare and catastrophic forms of childhood-onset epilepsy. On March 14, 2016, GW announced positive results from the first of these pivotal trials in Dravet syndrome.