Hi to all. I have Auto Immune Hepatitis. Diagnosed Feb2012. On pred down to 5mgs daily thank goodness. Tried Imuran in April. Could not tolerate it. Just started 6mp(mercaptopurine) 25mgs daily for two weeks to see if I can tolerate. On day 5. Doing weekly bloodwork to check liver enzymes. If no bad side effects during these two weeks I will go to 50mgs daily indefinitely. Of course with continuous labwork. Anyone else have any input as to how this drug worked for them? Possible side effects? Please please send a response. I would truly appreciate it! Blessings to all!