It does work ok for my fatigue but the biggest benefit is for my almost-narcoleptic attacks. It helps me wake up fully in the morning and stay alert. It also helps with cognitive thinking, gathering and maintaining focus and lifts the brain fog to a very managable level. Without it, I'm a basket case and shouldn't even be driving because of a tendency to suddenly fall asleep at the most inopportune times. My daily life functioning in everything I say or do is radically altered if I go without it for more than a day.
Unfortunately, there is now a unique and dire shortage of this med on the market so my next refill may have to be with a viable alternative of some kind of which I am dreading! What caused it and when that shortage will be alleviated is anybody's guess!!