I was put on steroids (Prednisone) for just 4 days Christmas week. It is now March and my insulin doses are still double what they were. While I was on the steroids, I had no appetite and my BG was still 28-30 without food. I'm type 1, though. Your doctor should have advised you about sugar levels with steroids... mine didn't. And I honestly regret being put on them as my BG levels have not been the same since. They are supposed to even out after you stop the steroids, but it CAN effect them afterwards in my personal experience. I cannot advise you on when it will come down, as it is different for everybody. I would call your diabetic nurse if you have one, and depending on the length of your steroid dose, you might have to either stop them or go on insulin for a while. It's ridiculous how badly steroids mess with your BG and I couldn't believe my doctor did not tell me to adjust my doses.