ive got stable liver damage,,so have done lots of research,,there is no specific link to reffer to,,information from many links,,,there may be no damage to a nerve,,to have pain,,just as alchohol numbs our nerves amonia does the opposite,they both change brain chemistry,,now imagine that you cant filter the allchohol from your body,,,your perception of pain would be for ever change,,but thers nothing wrong with your nerves,so taking meds.is a waste of time,,tn is like that,,,its not in the nerves ,,its the brain,,