Hi, I have been on vicadine(hydrocodone) 10/650 for the past 8 years 6 times a day for a severe back injury and nerve damage.,but my body has just about become immune to them now, I asked my dr. if there was something else he could put me on instead of the vicadin that would help the pain more, he said the only thing he could try was percocet which for some reason gives me horrible headaches but the vicadin never did and they are so similar plus they both have aceamitphine in them,so i was surprised that the percosets would give me such bad headaches, I also worry about the amount of acetomeophine i am puttin in my body everyday,I am at the maximum amt with the ciadin at 4000 mg a day. I was wondering if I asked him about oxycontin if since it is just straight ocycontin jus maybe it wouldnt cause me to get headaches.,it makes no sense to me though hat vicadin with acetametphine doesnt give me headaches but percosets also wih acetomeophine does give me headahes. I have already tried morphine pills, and that really did not even help the pain as much as the vicadin .8 years on vicadin is a very long time expecailly at 6  (10/650's) a day. What are your thoughts? I am desperate here. I am also very worried about my liver even though I get bloodwork done every 3 months to check it. Thanks everyone.