Background: Caffeine intake has been inversely associated with Parkinson’s disease (PD) risk. This relationship may be modified by polymorphisms of glutamate ionotropic receptor NMDA type subunit 2A (GRIN2A) and cytochrome P450 1A2 (CYP1A2), but the results of previous studies have been inconsistent.
Background: The prevalence of patients with PD taking antipsychotics is unknown.
Objective: To measure the prevalence of patients with PD taking antipsychotics.
Methods: We used the medical records-linkage system of the Rochester Epidemiology Project to study the use of antipsychotic medication in all persons with Parkinson disease in Olmsted County, Minnesota on 1 January 2006.