I have reduced prednisone too quickly twice on the advice of my doctors and ended up with bouts of severe vomiting and diarrhea. I finally stopped taking prednisone after five years six months ago and thought that this time I had slowed the process down but I still don't seem to have got it right!
I have had three episodes of sudden, one episode diarrhea and yesterday something new: I started diarrhea in the evening and it continued all night long. I finally fell asleep around four in the morning. You have stated that it could take as long as a year or more for the adrenals to function properly and I would like to hear from someone who has had the same kind of problems that I am having to hear whether they finally reach a better place as I am beginning to think perhaps staying on prednisone for life might be the better plan.