I've never heard that. It works for me, so I was shocked to read "does not work for that purpose at all" and even now "for 30 percent of people". I just google

I've never heard that. It works for me, so I was shocked to read "does not work for that purpose at all" and even now "for 30 percent of people". I just googled for "aspirin pain effectiveness" and the first hit was this: https://pubmed.ncbi.nlm.nih.gov/10796855/ https://pubmed.ncbi.nlm.nih.gov/10796855/ which doesn't match what you are saying.