Who can take part?

You may be eligible if you:

• Are living with Parkinson’s disease or dementia with Lewy bodies

• Are on a stable dose (for at least 28 days) of anti-Parkinson’s medication, a cholinesterase inhibitor, or memantine

• Experience visual hallucinations on a weekly basis

• Have a family member or friend who knows you well and can take part with you

Who may not be eligible?

You may not be able to take part if, in the past 5 years, you have experienced:

• Have a low heart rate (below 50 beats per minute)

• Are taking certain medications (e.g. apomorphine, ondansetron, or similar drugs)

• Have a history of allergic reaction to ondansetron

Key details

• Length of trial: Approximately 6 months

• Visit schedule: 3 in-person visits and 5 telephone appointments

• Trial type: Phase 2b clinical trial