my L-5 S-1 disk has completely disintegrated (started 11 years ago) my primary Dr. had me on different pain meds most recently Norco (4-5years) until i was hospitalized (sept.3 2012) with liver failure, then diagnosed with autoimmune hepatitis Sept. 11 2012 then was put on Vicoprofen for pain, and Imuran, and Prednisone for the AIH but i just saw the Vicoprofen has a Hepatotoxicity also, my back pain is completely off the charts, and not going away, is there any pain meds NOT hepatotoxic?