Overview An Open-label Extension Study of Cannabidiol Oral Solution (GWP42003-P, CBD-OS) in Patients With Rett Syndrome Status: Terminated Trial end date: 2021-06-09 Target enrollment: Participant gender: Summary This study will be conducted to evaluate the long-term safety of cannabidiol oral solution (GWP42003-P, CBD-OS) in participants with Rett syndrome. Phase: Phase 3 Details Lead Sponsor: GW Research LtdTreatments: CannabidiolEpidiolexPharmaceutical Solutions