The primary objective of APO401 was to gain additional safety data in the outpatient use of apomorphine. APO401 provided an opportunity for all patients who had participated in a Mylan-sponsored placebo controlled trial of apomorphine to receive apomorphine therapy as ambulatory outpatients. Patients other than those enrolled in a Mylan-sponsored study were allowed to participate. Additional data regarding the safety and effectiveness of outpatient use of subcutaneous apomorphine were derived from this experience.