I have started Humira 3 times now for various reasons, all 3 times I just did 40,30,20,10 after second loading dose. 7 days at each mg, after reading numerous threads I see this typical isn't normal and some people have a real hard time comming off of them. Longest I was on prednisone at one time was 6 ish months I wanna say.
Try whatever doctor says and if you notice any issue contact him immediately so he can slow taper. My GI just always gives me extra prednisone so I can make necessary adjustments if need be during taper.