Understanding a Very Common and Troubling Disorder, Parkinson's Disease Psychosis Over one million Americans live with Parkinson’s disease, which is a progressive movement disorder with well recognized symptoms often including tremors, rigidity and slowness of movement. However, what surprises many patients and their family is that over half of patients will also develop troubling non-motor symptoms, such as hallucinations and delusions. Parkinson’s Disease Psychosis What is Parkinson’s disease Psychosis? [caption id="attachment_89622" align="alignright" width="300"] Parkinson's disease problems - health concepts word cloud illustration. Word collage concept.[/caption] Parkinson’s disease psychosis is characterized primarily by hallucinations, often visual but possibly also occurring