Clozapine for Parkinson's disease psychosis in a septuagenarian: a nightmare turned into bliss.

Parkinson's disease psychosis, characterized by confusion, visual hallucinations, and delusions is a nightmare for the patients and caregivers. Classic neuroleptics aggravate the motor symptoms, hence the need for an effective atypical antipsychotic. Currently Pimavanserin is the only approved drug for Parkinson's disease psychosis (PDP), however it is not readily available.