I know everyone is different but I got to1mg in 18 months. FYIO: I was down to 5 in a year and had to stay there for a few extra months as my numbers from my quarterly blood work had gone up. My tapering schedule was started at 20 and I went down 2 1/2 each month until I got to 10 and then went down 1 each month until 1. Stayed on 1 two extra months and after that I stopped Prednisone.. It may come back but for now I am good. I followed my Rheumatologist's tapering schedule and had quarterly blood draws and so far it worked for me plus lots of good help and encouragement from John and others on Mayo connect.