I have been diagnosed with hemlytic anemia and this is the 2nd time I had to have blood transfusions. I am then treated with prednisone and imuran. What is imuran and what has caused this anemia. No one in family has had any condition like this however I do take alot of medications. What medications will cause this?

Summarized question: What is imuran? What has caused hemolytic anemia?