TOP HAT

This study will determine if ondansetron, a drug already used in the NHS, can be used as a treatment for visual hallucinations in people with Parkinson’s Disease or Lewy Body Dementia.

Visual hallucinations can be a common and distressing feature of Parkinson’s Disease and can have a significant impact on quality of life.

The Trial of Ondansetron as a Parkinson’s HAllucinations Treatment or TOP HAT is being carried out by researchers at the Northern Care Alliance on behalf of a team at UCL (University College London).