Neuroleptic Sensitivity in Parkinson's Disease and Parkinsonian Dementias

Dag Aarsland, M.D., Ph.D.
 Robert Perry, F.R.C.Path.
 Jan P. Larsen, M.D., Ph.D.
 Ian G. McKeith, F.R.C.Psych.
 John T. O'Brien, M.R.C.Psych.
 Elaine K. Perry, Ph.D.
 David Burn, M.D.
 Clive G. Ballard, M.R.C.Psych., M.D.

Background: Severe sensitivity to neuroleptic agents is a major clinical problem in dementia with Lewy bodies (DLB), but has not been determined in Parkinson's disease (PD) and PD with dementia (PDD).

Method: Severe neuroleptic sensitivity reactions (NSRs) were evaluated according to an operationalized definition blind to clinical and neuropathologic diagnoses in prospectively studied patients exposed to neuroleptics from 2 centers. The study was conducted from June 1995 to May 2003.

Results: Ninety-four patients were included (15 with DLB, 36 with PDD, 26 with PD, 17 with Alzheimer's disease, all diagnosed with various operational criteria). Severe NSR only occurred in patients with Lewy body disease: DLB (8 [53%]), PDD (14 [39%]), and PD (7 [27%]), but did not occur in Alzheimer's disease (p = .006). Severe NSR was not associated with other clinical or demographic features. In DLB, severe NSR was not associated with neuropathologic indices (Consortium to Establish a Registry for Alzheimer's Disease staging, Braak staging, or cortical distribution of Lewy bodies).

Conclusions: An operationalized evaluation of severe NSR blind to diagnosis confirmed the high prevalence in DLB and identified high frequencies in Parkinson's disease and PDD with important implications for clinical practice.

(J Clin Psychiatry 2005;66:633-637)

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Received Feb. 16, 2004; accepted Nov. 16, 2004. From the Section of Geriatric Psychiatry (Dr. Aarsland) and the Department of Neurology (Dr. Larsen), Central Hospital, Rogaland, Stavanger, Norway; the Department of Neuropathology (Dr. Perry) and the Department of Old Age Psychiatry (Drs. McKeith, O'Brien, Perry, and Burn), Newcastle General Hospital, Newcastle Upon Tyne, U.K.; and Wolfson Centre for Age-Related Diseases, King's College London, London, Great Britain (Dr. Ballard).

The authors report no conflicts of interest, financial disclosures, or other relationships relevant to the subject matter of this article.

The authors would like to thank the Medical Research Council, U.K., for supporting this study.

Corresponding author and reprints: Clive Ballard, M.R.C.Psych., M.D., Wolfson Centre for Age-Related Diseases, School of Biomedical Sciences, King's College London, Guy's Campus, London, Great Britain, SE1 1UL (e-mail:clive.ballard@kcl.ac.uk).