My 84 year old father has been taking 500mg of Tylenol 4 to 6 times per day, everyday, for more than 1 year. He is taking it primarily for hip pain and also has hydrocodone 7.5/325 (more tylenol) that he takes once per day (it is prescribed to take every 4-6 hours as needed).
I have told him it is like innoculating his body with Tylenol, and that it is slowing harming him.
Is this harmful? Is it damaging the liver?