Aspirin can lower the risk of heart attacks, but there's concern that it's being overused. Jim DeLillo/iStockphoto hide caption

toggle caption Jim DeLillo/iStockphoto

For all the good aspirin can do in preventing second heart attacks and strokes, taking it daily can boost some risks, too — of ulcers, for example, and of bleeding in the brain or gut. iStockphoto hide caption

toggle caption iStockphoto

Aspirin has been prescribed for decades as a simple way to reduce heart disease risk, but doctors still aren't sure how it works. hide caption

toggle caption

Aspirin helps reduce the risk of cardiovascular disease, but the jury's still out on cancer. hide caption

toggle caption

NPR thanks our sponsors

Become an NPR sponsor