The study included a maximum 2-week Screening Period, a maximum 4-week Titration Period for early-stage Parkinson's disease or maximum 7-week Titration Period for advanced-stage Parkinson's disease, 8-week Maintenance Period, a maximum 6-day De-escalation Period for early-stage Parkinson's disease or maximum 12-day De-escalation Period for advanced-stage Parkinson's disease and 30-day Safety Follow-Up Period.