In this issue of the Journal, Petersen et al. present the long-awaitedresults of a randomized, placebo-controlled trial of donepezil,a standard therapy for Alzheimer's disease, and the widely usedantioxidant vitamin E as an early intervention for mild cognitiveimpairment essentially the prodromal phase of Alzheimer'sdisease.1 The implications of this study for primary care medicineand for public health are enormous. The clear-cut negative findingsfor vitamin E, which is widely used despite the dearth of evidenceof its efficacy, are especially noteworthy. The findings fordonepezil, on the other hand, are much less clear.
From the Gerontology Research Unit, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, and the Department of Epidemiology, Harvard School of Public Health all in Boston.
This article was published at www.nejm.org on April 13, 2005.
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