People over 75 taking daily aspirin after a stroke or heart attack are at higher risk of major - and sometimes fatal - stomach bleeds than previously thought, research in the Lancet shows, BBC informs.
Scientists say that, to reduce these risks, older people should also take stomach-protecting PPI pills.
But they insist aspirin has important benefits - such as preventing heart attacks - that outweigh the risks.
And they warn that stopping aspirin suddenly can be harmful.
Anyone with concerns should speak to a doctor before considering changing medication, they say.