The study will be conducted in 3 phases:
- Screening Period (up to 2 weeks) during which patient eligibility will be assessed
- Double-blind Treatment Period (6 weeks) during which all patients will be randomized to receive lumateperone or placebo in 1:1 ratio.
- Safety Follow-up Period (1 week) during which all patients will return to the clinic for a safety follow-up (SFU) visit approximately one week after the last dose of study drug.