Hello,
Stage 3 is a wide range of kidney function. It would help to know your absolute level. Having said, if you are closer to a stage 2 CKD, then there are no major medication restrictions. As a general rule of thumb, at all stages of CKD, acetaminophen is safe while drugs like Advil, Narrosyn, Alleve, Celebrex (the NSAID class), should be avoided. Short term use of most over the counter preparations (except for NSAIDs) would be considered quite safe within stage 3 CKD.
Jordan