Parkinson's disease (PD) is a brain condition that makes people shake, feel stiff, and move slowly. This study looks at how safe and helpful a medicine named ABBV-951 is for treating PD in Japan. ABBV-951 is already allowed to be used for PD in Japan. Around 250 adults, aged 15 and older, who have PD and are already taking ABBV-951 will join the study. They will be observed for about one year, or 52 weeks. The study will not add any extra visits or tasks for the participants. They will continue their regular treatment and check-ups with their doctors, which can happen in person or online.
- Participants will be followed for 52 weeks (1 year).
- No additional burden; visits can be on-site or virtual.
- Must not have used ABBV-951 before or be in other clinical trials.