Ensuring aspirin's benefit

Q. Is it true that in some people, low-dose aspirin doesn't help to prevent heart attacks? Should I take a higher dose to make sure it works?

A. Recent research suggests that the cardioprotective benefit of aspirin may vary for different people, although the reasons are unclear. Daily low-dose aspirin (81 milligrams) suppresses the body's clotting response. This helps prevent blood clots that cause heart attacks and most strokes. If you are at elevated risk because of known heart disease or a past stroke, taking a daily
aspirin can save your life.

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