I don't take Tylonol for this very reason. Also be very careful taking other OTC pain killers; Advil, Naproxin, even aspirin in large doses for long periods of time.
http://kidney.niddk.nih.gov/kudiseases/pubs/analgesicnephropathy/index.htm
I just got a script for Naproxen for use as an antiinflamitory, joint problems caused by youthful indiscretions, brawling for the most part. I let the doctor know that I had some reservations about it because of potential kidney problems. He agreed that they might be a problem if over done and said essentially if it don't hurt, don't take it and limited the number of pills.