It sort of depends on how your body deals with it and how long you have been on, etc. I am on 40mg now, but it has been a long time since I have fully tapered off. Last round of Pred was over 10 years ago!
I feel like it was a couple of weeks after I fully stopped to shake all the side effects, but it took me a loooong time to get off (stayed at 5 mg and 2.5 mg for quite a while).
How much are you on and how long have you been on it?