Yes, testosterone level makes a huge difference, and if Addison's is there having your hydrocortisone and fludrocortisone levels right is a big help for everything. I battle the constant fatigue as well, I'm 47, my brother died at 49 from this and he was always tired as well, but at the time we thought it was from the pain meds he was on. I also contribute alot of my fatigue to not getting uninterrupted sleep at night, I'm hoping this might get better once things at home are a little more calmed down and things to do are done.....
Charlie, ask your health care provider about a topical gel testosterone. I use Androgel daily and haven't had to have the regular shots for quite a few years now. I just rub the gel on my shoulders in the morning and that's all I need to do.