There is a quick detox system that some hospitals do. They put you into a drug induced and monitored sleep/semi coma and pull you off the drugs cold turkey over the next 48 hours. My BIL did it for Oxy.

Who ever prescribed the Percocet should admit you to a hospital for a rapid detox.

Has your prescribing doctor tested your liver enzymes with a blood test yet?
Your liver may also be in bad shape from the acetaminophen.