This issue of problems with the kidneys and liver when using NSAIDS goes back to the 70s for sure. We debated it in the days when I worked in ICU.
Remember Kenny Easley?
Liver AND kidney failure is the real risk, as well as aberrations of clotting, silent bleeding, some indication of bone loss and nutritional deficincy. Ginger, willow bark, MSM, turmeric or other are better choices.
There is the same or more risk with aspirin since, like the blood thinners (coumadin or heparin et al), it too will eventually cause disintegration of the cell wall membrane and extremely hazardous bleeding.
So what isn't your doctor telling you?