Aspirin taken by thousands of people to thin the blood and ward off strokes could double the risk of heart attacks, experts have warned.
A study of 30,000 NHS patients found those with atrial fibrillation – a heart condition that causes an irregular and often abnormally fast heart rate – were at higher risk if they took aspirin than other drugs.
Researchers from Southampton University and Maastricht University in the Netherlands examined health records of people who were prescribed warfarin, aspirin or a new generation of pills to prevent stroke.
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