Does Prolonged Percocet Intake Cause Liver Damage?

Hi doc, I was in a bad car wreck 8 yrs ago still on pain med Percocet 7.5/325 should I be worried about liver damage with Tylenol or should I ask for oxycodone without Tylenol? I suffer with severe back , hip & pelvis were shattered in MVA, I also suffer chronic headaches from brain injury? Should I ask without sounding drug seeking or just continue taking Percocet?