It can definitely affect blood glucose levels, cause low energy and horrid weight gain
. Fortnately, many of these side effects
go way pretty quickly once you're able to stop the meds.
I wasn't real familiar with your condition/s so I did a little research. The information I found said that, while steroids such as prednisone, are typically the first line of defense - many times another immunosuppressent medication, such as Imuran or Methotrexate (or others), is quite often added.