I took Adrenal Rebuilder, Dr. James Wilson's glandular supplement, when I first started self treated AF. From what I have learned since then(from my own experience) I wouldn't recomend the glandular supplement for stage 3 AF. It is too stimulative - you may feel somewhat better initially - but you're adrenals are not getting the rest and nutrition they need to recover.
I've learned AF can be very counter-intuitive and requires incredible patience. You remove the caffeine, sugar, loud music, various supplements - whatever stimulants you have been using to keep going - then supplement with the various types of vitamin C and pantethine to get the adrenals the nutrients they need to recover - along with lots of rest of course.