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Impact of Current Antipsychotic Medications on Comparative Mortality and Adverse Events in People With Parkinson Disease Psychosis.

Abstract：

OBJECTIVES:To establish the mortality risk and adverse events associated with the use of atypical antipsychotic medications in people with Parkinson disease psychosis (PDP) in a clinically defined trial cohort. DESIGN:Post hoc analysis of data from a multicenter, open-label extension study of pimavanserin comparing people taking and not taking current antipsychotics. SETTING:Primary and secondary care medical centers in the United States, Canada, Europe, and India. PARTICIPANTS:A total of 459 people with PDP enrolled in the extension study. Participants were between ages 30 and 80 years, and had an established diagnosis of idiopathic Parkinson disease and moderate to severe psychosis. INTERVENTIONS:Participants were categorized into 2 groups: those receiving concomitant antipsychotic medications ("concurrent APD") and those who did not take antipsychotic medications at any time during the study ("no APD"). Participants were receiving 40 mg pimavanserin daily in addition to concurrent antipsychotics and Parkinson disease medications. MAIN OUTCOME MEASURES:Safety assessments at 2 weeks; 1, 3, 6, 9, and 12 months; and every 6 months thereafter, including evaluation of adverse events (AEs), vital signs, weight, physical examinations, 12-lead electrocardiograms, clinical laboratory tests (serum chemistry, hematology, and urinalysis), and the Unified Parkinson's Disease Rating Scale Parts II and III (UPDRS-II+III, activities of daily living and motor impairment, respectively). Differences between participants taking and not taking current antipsychotics were evaluated using incidence rate ratios (IRRs) with 95% confidence intervals (CIs). RESULTS:There was significant increase in the mortality rate for participants taking concurrent antipsychotics compared with the group not taking antipsychotic medications (IRR 4.20, 95% CI 2.13-7.96). Participants who received a concurrent antipsychotic were also significantly more likely to experience overall a serious AE (IRR 2.95, 95% CI 2.02-4.24), any antipsychotic-related event (IRR 1.66, 95% CI 1.18-2.29), cognition-related events (IRR 2.70, 95% CI 1.19-5.58), infections (IRR 1.97, 95% CI 1.17-3.16), and edema (IRR 2.61, 95% CI 1.09-5.59). The risk of falls, stroke, sedation, orthostatic hypotension, and thromboembolic events was also increased in these individuals but this was not significant. CONCLUSIONS:This study highlights a significant risk of mortality, and severe AEs in patients with Parkinson disease receiving atypical antipsychotics. This is similar to or greater than the risks seen in people with Alzheimer disease, although with a less clear-cut risk of stroke and a longer delay to increased mortality.

journal_name

J Am Med Dir Assoc

journal_title

Journal of the American Medical Directors Association

authors

Ballard C,Isaacson S,Mills R,Williams H,Corbett A,Coate B,Pahwa R,Rascol O,Burn DJ

doi

10.1016/j.jamda.2015.06.021

subject

Has Abstract

pub_date

2015-10-01 00:00:00

pages

898.e1-7

issue

eissn

1525-8610

issn

1538-9375

pii

S1525-8610(15)00442-9

journal_volume

pub_type

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Impact of Current Antipsychotic Medications on Comparative Mortality and Adverse Events in People With Parkinson Disease Psychosis.