A new study published in JAMA Neurology raises more concerns about the bleeding risk of low-dose aspirin.
It found more brain bleeds in people who took aspirin to prevent heart attack and stroke, but who didn't have a history of those conditions.
People also from Asian backgrounds and those with a body mass index under 25 had the highest risk.
Earlier this year, heart experts said people with no previous strokes or heart attacks should NOT take low-dose aspirin because of the risk of internal bleeding.
Study: Low-dose aspirin raises risk of brain bleeds for those without heart risk