I beleive r3mdesiver kills the kidneys doesn’t it? If you get regular checkups, you can ask for a gfr test I think it is, (ask for test to check kidney function) to see how the kidneys are doing- it is usually done with blood tests. As we get older, it’s good to get this checked anyways if we can afford to.
I believe you are right. I have bloodwork tests done every six months, and so far so good, but still, it concerns me.