That's an awful lot of (I'm going to assume) oxycodone that you're putting in your system. Can you be a little more specific about what you're actually taking though? Oxycodone or Oxycontin? Either way, it's still a large dose. Let's hope you aren't taking your doses in the form of Percocet, that's a crapload of APAP breakdown to be putting your liver through.
If you don't have an insane tolerance to the drug, that dose is massive. Give it to someone who's never taken Oxy in their life and they'd probably drop dead. What a your reasoning for taking it? You may want to start tapering down soon, I can't even imagine the withdrawals you're getting... I was on Oxycodone 20mg three times a day at one point, and the withdrawal from THAT was horrible enough. You may not even need that much to relieve your pain and you probably don't realize it. Try a smaller dose, please.