I have been taking Darvocet N-100 since around 1992. I had neck surgery and took it prior to during and after and ever since. What I currently take is - at most - 7 pills a day, usually 1-1/2 pills at a time. Is there a way I can safely wean myself off of this? I'm worried about my liver. Once or twice I tried quitting and felt anxious and could not sleep. Anyone know anything about this subject? thanks.