@lag
I know of no published tapering instructions that I could give you.

This was discussed months ago, at one of the ancan.org Weekly advanced prostate cancer online meetings. A number of people had problems with stopping too quickly, and as they were talking, I realized I had exactly the same problem, I was exhausted in the afternoon and had to sleep, Something I normally didn’t do.

Somebody that’s on 5 mg needs to cut down to 2 1/2 mg for two or three weeks and then alternate that every other day for a couple of weeks and maybe even cut that in half for a week or two. So many people have this really fast, fatigue problem because they drop it too quickly.

One guy I was working with (Imerman Angels) ended up getting 1 mg prednisone tablets from his doctor so he could taper even more slowly. He was just exhausted after trying to come down from 10 mg too quickly. In his case he had to move up to 10 mg because he was so tired with just five. It took him at least four or five months to taper down.