In recent years aspirin has been hailed as something of a wonder drug in terms of reducing people's risk of heart disease and stroke. However a recent trial on 6,377 women in the U.S. has found that aspirin does not improve cognitive function. The women were divided into two groups, one group taking aspirin and the other a placebo, and given tests at periodic intervals. The women who were taking the aspirin performed no better than the placebo group.
Kang, Jae Hee ... [et al] - Low dose aspirin and cognitive function in the women's health study cognitive cohort British Medical Journal 12 May, 2007, 987-990