This was an 8-week, outpatient, multicenter, open-label, single-group, flexible-dose study.
Following a screening period of up to 21 days, eligible participants took part in the study. In the 8-week treatment period, participants were treated with SEP-363856 while continuing to take the full dose of their pre-switch antipsychotic. After the end of the treatment period, participants were required to complete the follow-up visit, 7 days after the last dose of SEP-363856.