All pills can do that? I thought many were designed to dissolve in your stomach like tums. Not sure why they should be exceptionally bad, unless tums cause issues too.
I read "pills" as referring to other Aspirin-class medications (OTC NSAIDs and/or pain relievers), such as Naproxen Sodium, Paracetamol and Ibuprofen.
A pill, after all, is just a transport mechanism. It's the substance of the pill that determines side effects and risk. For example, you don't often hear about multivitamins causing stomach bleeding.
Well they all MIGHT. My understanding is that most pills these days have some kind of protection for your stomach. But it doesn't work 100%, and it doesn't work perfectly on everybody.