My GI has urged me to consider Imuran and says that Imuran will almost certainly raise LFTs in the first three months as the liver acclimates itself to the drug. He claims that this will not cause any permanent damage.
If LFTs remain elevated after that period: 1. If it's working, then monitor the LFTs in an attempt to find a happy balance or 2. If it's not working, discontinue the drug.