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Correspondence |

Delusions and Hallucinations in Alzheimer Disease

Sudeep S. Gill, MD, MSc, FRCPC
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Copyright 2006 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.

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Arch Neurol. 2006;63(4):627-627. doi:10.1001/archneur.63.4.627-a
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I enjoyed reading the article by Dr Scarmeas and colleagues1 detailing the results of their carefully planned cohort study. This study examined the association between the presence of hallucinations and delusions and the development of clinically important outcomes (eg, decline on a cognitive outcome, decline on a functional outcome, institutionalization, and death). In modeling the effects of hallucinations and delusions on these outcomes, the investigators adjusted for the use of neuroleptic drugs (ie, antipsychotics) and cholinesterase inhibitors. The authors provided data on the relationship between neuroleptic drug use and the clinical outcomes, and a recent meta-analysis shed further light on the potential risks of neuroleptic drug treatment in dementia.2 I wonder if Dr Scarmeas and colleagues can provide further insights into the influence of cholinesterase inhibitors on their measured outcomes.

There has been ongoing debate about the value of cholinesterase inhibitor treatment. Although some studies have identified little meaningful benefit on clinically important outcomes with these drugs,3 other research has found cholinesterase inhibitor use is associated with delayed nursing home placement and slower progression of cognitive decline.4 No clear consensus has yet appeared. What impact did exposure to cholinesterase inhibitors have on the 4 outcomes measured in this study?

AUTHOR INFORMATION

Correspondence: Dr Gill, Department of Medicine, Queen's University, Kingston, Ontario, Canada K7L 5A2 (gills@pccchealth.org).

REFERENCES

Scarmeas  N, Brandt  J, Albert  M.  et al.  Delusions and hallucinations are associated with worse outcomes in Alzheimer disease. Arch Neurol 2005;621601- 1608
PubMed
Schneider  LS, Dagerman  KS, Insel  P. Risk of death with atypical antipsychotic drug treatment for dementia: meta-analysis of randomized placebo-controlled trials. JAMA 2005;2941934- 1943
PubMed
AD2000 Collaborative Group,  Long-term donepezil treatment in 565 patients with Alzheimer's disease (AD2000): randomised double-blind trial. Lancet 2004;3632105- 2115
PubMed
Lopez  OL, Becker  JT, Saxton  J, Sweet  RA, Klunk  W, DeKosky  ST. Alteration of a clinically meaningful outcome in the natural history of Alzheimer's disease by cholinesterase inhibition. J Am Geriatr Soc 2005;5383- 87
PubMed

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Scarmeas  N, Brandt  J, Albert  M.  et al.  Delusions and hallucinations are associated with worse outcomes in Alzheimer disease. Arch Neurol 2005;621601- 1608
PubMed
Schneider  LS, Dagerman  KS, Insel  P. Risk of death with atypical antipsychotic drug treatment for dementia: meta-analysis of randomized placebo-controlled trials. JAMA 2005;2941934- 1943
PubMed
AD2000 Collaborative Group,  Long-term donepezil treatment in 565 patients with Alzheimer's disease (AD2000): randomised double-blind trial. Lancet 2004;3632105- 2115
PubMed
Lopez  OL, Becker  JT, Saxton  J, Sweet  RA, Klunk  W, DeKosky  ST. Alteration of a clinically meaningful outcome in the natural history of Alzheimer's disease by cholinesterase inhibition. J Am Geriatr Soc 2005;5383- 87
PubMed

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