This is a repetition of what I've said elsewhere, but my experience with LDN -
good (noticeable with short term use, all but the last item continues long term):
- reduced pain levels (no specific type of pain, but more like the 'volume' knob on my pain perception was turned down a notch or two (this helped my sleep too I believe)
- slight improvement with OI
- milder crashes
- mild euphoric feeling with initial startup and sometimes dosage increase (a feeling of all being right with the world)
good (long term), these aren't all due to LDN alone, like GG LDN isn't the only factor in my treatment regime, but I see LDN as an integral part of that regime. But in the year and a half since I started LDN:
- significant improvement in sleep quality
- significant decrease in pain
- significant increase in functioning and decrease in frequency/duration of crashes
- significant improvement in hyperstimulation symptoms
- improvement in cognitive functioning
- improvement in OI
- improvement in endometriosis (possibly unrelated, but who knows...)
bad (all short term):
- MILD sleep disturbance with initial startup and dosage increases
- I think some mild nausea (lasted maybe a month or two?), not wonderful, but not that bad - never bad enough to cause me to be unable to eat (I think I just had a narrower range of what sounded good and ate more out of obligation than desire), or to even come close to throwing up
- when my dosage is too high, excessive daytime sleepiness (different from fatigue), depressive feelings/anhedonia. This can happen if I rapidly increased my dose, or if I took a little too much for a longer time and it built up in my system. These symptoms clear up pretty quickly once I dial back my dosage.
I don't try to exercise as I'd rather use my energy for 'doing things' so I can't specifically address exercise tolerance, but I am certainly able to be more active (which may be the same thing - or at least similar).
Also you might want to try searching on 'naltrexone' usually someone will use the term in a thread about LDN and it's long enough for the PR search engine to work on.
Good luck!