Both the American Heart Association and the U.S. government recommend aspirin to prevent first heart attacks in people who are at high risk because of conditions such as diabetes.
The report is published in the online issue of The BMJ.
Aspirin may not reduce heart attack risk for all
Aspirin is effective in reducing the risk for people who already have had a heart attack or stroke.
However, in the study of 1,300 people who had not yet suffered a heart attack or stroke but were at high risk, the study found that they did not benefit from daily aspirin.
