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Aricept Drug Trial Finds Small Benefit in Severe Alzheimer's Disease

by Christine Kennard
for About.com

Updated: March 28, 2006

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

What this Study About Aricept and Severe Alzheimer's Means to You

A drug trial of Aricept, a cholinesterase inhibitor used for treating early and moderate Alzheimer's, has found some benefit for people with a severe form of the disease. Published in the Lancet (March 23 2006) the research was carried out in Sweden nursing homes by Bengt Winblad and colleagues from the Karolinska Institite. The six month study looked at 248 patients over age 50 (average age of about 85 yrs) with severe Alzheimer's disease. 194 patients completed the study and of these 95 patients received Aricept, 99 a placebo.

The study subjects were given tests to established whether there were any improvements in things such as memory, language and social interactions. The findings showed that although there was some slight improvements in the group of people with severe Alzheimer's who took Aricept (Donepezil) those improvements "did not meet predefined thresholds" but were statistically significant.

What this Study About Aricept and Severe Alzheimer's Means to You
Points to remember when evaluating the research findings include the following:

  • Past research into the use of Aricept for people with severe Alzheimer's disease have been inconsistent

  • A recent drug trial using Aricept for people with vascular dementia had higher than expected death rates (March 2006)

  • The scores for cognitive improvements were statistically significant but failed to translate into any real benefit for people in long stay nursing care who have severe advanced Alzheimer's disease.

  • It is highly questionable whether the cost of the medication could be justified for people in nursing home care placements with such minimal improvement

  • Some subjects experienced side effects from the medication such as hallucinations and diarrhea

  • There is little evidence that the people with Alzheimer's quality of life improved in any way due to the minimal improvements reported.
  • Article Source: Winblad, Bengt, et al, "Donepezil in patients with severe Alzheimer's disease: doubleblind, parallel-group, placebo-controlled study" Published in The Lancet March 23, 2006

    03/28/2006

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