This study is looking at a condition called Dementia with Lewy Bodies (DLB). DLB is a type of dementia, which affects memory and thinking. To help patients, the study will use a medicine called Ambroxol and special digital tools to track symptoms. The study will last up to 18 months and will be done mostly at home. Participants will use a smartphone and a smartwatch to help collect information. Caregivers, who are the people helping the patient, will also be part of the study to help understand how DLB affects them too.

The study will not require extra visits to the clinic, as data will be collected from home using technology like mood and sleep sensors. Only people already in the ANeED study can join this study. Participants will need to take Ambroxol tablets and agree to give samples for testing.

• The study lasts up to 18 months and takes place mostly at home.
• Special home devices will be used to measure sleep, activity, and mood.
• Participants will take Ambroxol tablets as part of the study.