studies Most people won’t benefit from daily aspirin
Taking a low-dose aspirin every day has long been known to cut the chances of another heart attack, stroke or other heart problem in people who already have had one, but the risks aren’t worth it for most folks, major new research finds.
Although it’s been used for more than a century, aspirin’s value in many situations is still unclear. The latest studies are some of the largest and longest to test this pennies-a-day blood thinner in people who don’t yet have heart disease or a blood vessel-related problem.
One found that aspirin did not help prevent first strokes or heart attacks in people at moderate risk for one because they had several health threats such as smoking, high blood pressure or high cholesterol.
Another tested aspirin in people with diabetes, who are more likely to develop or die from heart problems, and found that the modest benefit it gave was offset by a greater risk of serious bleeding.
Aspirin did not help prevent cancer as had been hoped.
And fish oil supplements, also tested in the study of people with diabetes, failed to help.
The research was discussed Sunday at the European Society of Cardiology meeting in Munich. The aspirin studies used 100 milligrams a day, more than the 81-milligram pills commonly sold in the United States but still considered low dose. Adult strength is 325 milligrams.
A Boston-led study gave aspirin or dummy pills to 12,546 people who were thought to have a moderate risk of suffering a heart attack or stroke within a decade because of other health issues.
After five years, 4 percent of each group had suffered a heart problem – far fewer than expected, suggesting these people were actually at low risk, not moderate. Other medicines they were taking to lower blood pressure and cholesterol may have cut their heart risk so much that aspirin had little chance of helping more, said the study leader, Dr. J. Michael Gaziano of Brigham and Women’s Hospital.
One percent of aspirin takers had stomach or intestinal bleeding, mostly mild – twice as many as those on dummy pills. Aspirin users also had more nosebleeds, indigestion, reflux or belly pain.
Bayer sponsored the study, and many researchers consult for the aspirin maker. Results were published by the journal Lancet.
People with diabetes have a higher risk of heart problems and strokes from a blood clot, but also a higher risk of bleeding. Guidelines vary on which of them should consider aspirin.
After seven and a half years, there were fewer heart problems among aspirin users but more cases of serious bleeding, so they largely traded one risk for another.