Have been on Azathioprine for about 3 yrs. Was given to me originally by my Gastroenterologist as I also have Chron’s Disease as some treatments are the same as for CIDP. Was told by taking this I could decrease amount of prediinose I was taking. I am also on IVIG every three weeks. I honestly don’t know if it is working. Get done to 10mg prednisone and I start having problems. Must go back to no lower than 15mg a day. Also blood work must be done to check for liver problems.