Frequent use of aspirin can lead to increased bleeding

January 22, 2019

A new study published today in the Journal of the American Medical Association (JAMA) has found that taking aspirin on a regular basis to prevent heart attacks and strokes, can lead to an increase risk of almost 50% in major bleeding episodes.

The systematic review from scientists at King's College London and King's College Hospital looked at the overall effects on patients who did not have known cardiovascular disease. They found that while it was associated with a lower risk of heart attacks and other cardiovascular events, it did lead to an increased risk of major bleeding.

While aspirin is known to reduce risks for those who have previously suffered strokes and heart attacks, the evidence of the role of aspirin in the initial prevention of cardiovascular events, is uncertain.

This study looked at the outcomes of trials enrolling more than 1,000 participants with no known history of cardiovascular diseases and which included a follow-up after twelve months. Participants included ones who took aspirin and other who took a placebo or had no treatment at all.

The results showed that: Lead author, Dr Sean Zheng, Academic Clinical Fellow in Cardiology at King's College London said: "This study demonstrates that there is insufficient evidence to recommend routine aspirin use in the prevention of heart attacks, strokes and cardiovascular deaths in people without cardiovascular disease.

"There has been more uncertainty surrounding what should be done in patients who are at higher risk of cardiovascular disease and in patients with diabetes. This study shows that while cardiovascular events may be reduced in these patients, these benefits are matched by an increased risk of major bleeding events.

"Aspirin use requires discussion between the patient and their physician, with the knowledge that any small potential cardiovascular benefits are weighed up against the real risk of severe bleeding."
-end-


King's College London

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