To 14642,
First of all, I want to tell you that you must be a very sweet man. My boyfriend never even care to do research about Prednisone to understand what I was going through. I had to do the research myself and explain to him the side-effects so that he could understand me, aweful! But the positive outcome was that I educated myself about my treatment and that helped me to be tough.
To answer your question, it is said that for every month one is on Pred., add 1 month to it. For example, your wife is on Pred. for 1 month, then it'll take 2 months to get close to be normal again, including the weight gain. I was on Prednisone for 4 months and had just completed my 8th month steroid-free life, and let me tell you I am back to be myself again! Good luck to both of you. Hope this helped you!
Gypsi