I don't understand the mechanism exactly but I have to think it has something to do with dopamine. My reasoning is because I took a bunch of things to raise dopamine three days ago and had the best day I've had in years.
The bad part is that I'm in a crash today even though I skipped those supplements yesterday to cycle them and even rested but taking them again today isn't working.
I had the same. I am suffering from ADD and when taking Amphetamine and Methylphenidate (Ritalin) perscribed for my ADD for the first time, I was doing 100% good, like pre-CFS- HOLY SHIT. I never felt so good in my past 16 years. So I actually thought ADD might be my personal CFS...
But after 2 months, my crash got so hard, I've been bedridden for almost a year now
Now if I take any dopamine medication, I just a get a crash straight away, no boost no more.