I suffer migraines every day and have been taking hydrocodone 5/500s for a little over two years now. About a year ago I started to take three pills (1500 mgs) simultaneously since two stopped easing it the headache. Apart from the obvious implications of addiction -- which at this point I am not interested in discussing -- I am concerned for my liver. If I have been taking this dosage every day for a year, should I be worried despite NEVER going over the 4000 mg daily limit?