In the first aid section of the course i'm doing, it says if someone is having a heart attack to give them an aspirin to chew.
A few years ago there was a tv show host who took an aspirin a day, because his father died at a young age from a heart attack. On the show they put a fibre optic camera down his throat to check for damage.
The aspirin had caused a lesion in his gut Maybe it was an ulcer not sure now.