Narcotic (opioid) analgesic agents are extensively metabolized by the liver
several of them (e.g., codeine, hydrocodone
, meperidine, methadone, morphine, propoxyphene) have active metabolites that are further converted to inactive substances....."
Opiates can cause liver damage, some more than others. I wish I had better information for you. I encourage you to discuss this with your physician. .... and Please let us know how you are doing and what you discover.