Well first of all I am obese but I could definitely see the moonface. As I remember it - yes, I was completely off the prednisone a month at least before I noticed a difference.
I took 40 a week, 30 a week, 20 and back to 30 for four months - then tapered 5 mg. every week until down to 5 and then every other day 5 mg. and done - about 5.5 months altogether. Wish I had written all this down.
My husband said my face started to go down before I noticed it so maybe yours will too. I didn't think I would mind it as I have a round fACE BUT was happy when it was gone.
Good luck!
ElaineNY