narcolepsy
"I've known something was wrong with me for several years now, but only recently did I "push the point" and get some face time with a specialist. The pulmonologist put me on a CPAP machine and dismissed my MSLT results, whereas the neurologist paid attention to my MSLT results and diagnosed me with narcolepsy. He put me on 250mg Nuvigil, broken in half, 1 in AM and 1 at noon. The first day it worked *great*, the rest of the first week or two it worked so-so (still had "the nods" at my desk, driving, etc, but usually didn't fall completely asleep), but it really hasn't helped since then. I, too, will "stick it out" for a month."