I try to remember to take my DHEA with my prednisone (oral steroids). I am usually on them for very short periods, so usually dont get "moon face".
I have read that DHEA can increase the effrectiveness of steroids, and reduce some side effects. Used alone, it has also been found to reduce body fat. Additionally, I think MS'ers are known to be below average in DHEA. I would suggest looking into it. I mostly take it for the reduced bone stripping of steroid useage.