No significant benefits were seen with donepezil compared with placebo in institutionalisation (42 % vs 44 % at 3 years; p = 0.4) or progression of disability (58 % vs 59 % at 3 years; p = 0.4). (sens.org)
A U.S. study of healthy young and older subjects who took donepezil for only 14 days found that performance on short - term memory tasks actually deteriorated slightly. (discovermagazine.com)
A small 2006 study found ginkgo was as effective as the drug donepezil for boosting attention and memory in people with mild to moderate Alzheimer's. (businessinsider.com)