A Study of GWP42003 as Adjunctive Therapy in the First Line Treatment of Schizophrenia or Related Psychotic Disorder

This eight-week (six-week treatment period and two-week follow-up), multi-centre, double-blind, randomized, placebo-controlled, parallel group study aimed to determine the efficacy, safety and tolerability of GWP42003 in participants with schizophrenia or a related psychotic disorder. Eligible participants entered the study at a Screening and Randomization Visit (Day 1), where eligibility was established. Once all inclusion and exclusion criteria were reviewed, participants were randomized to receive either GWP42003 or placebo in conjunction with their prescribed anti-psychotic medications and began treatment on Day 1 as instructed. Assessments were performed on Days 8, 22, and 43. A safety follow-up visit was conducted on Day 57.