interesting study

This isn't information I need yet, but it is so clear I thought it worth linking:

Clozapine is the only antipsychotic shown to be efficacious for the treatment of PD psychosis, although quetiapine is more frequently used because of convenience. Concerns about antipsychotic sensitivity in DLB patients may prevent antipsychotics from being tested further in this population. There is also preliminary evidence that cholinesterase inhibitors may have antipsychotic properties in both PD with dementia and DLB.

source: "Presentation and Management of Psychosis in Parkinson’s Disease and Dementia With Lewy Bodies," Daniel Weintraub, M.D., and Howard I. Hurtig, M.D. Am J Psychiatry 164:1491-1498, October 2007 http://ajp.psychiatryonline.org/cgi/reprint/164/10/1491