narcolepsy
"During a yearly checkup, my doctor impressively picked up on my sleep disorder (personally, I thought he was nuts; I felt it was just all the crazy stress in my life that made me want to sleep at any chance I got). Well, my sleep study came back severely abnormal. What?? Are you kidding me???  He was right!  I was diagnosed with excessive daytime sleepiness/narcolepsy without cataplexy. Since then, I have been on Nuvigil 250mg.  I cannot begin to tell you the difference it has made! The response was immediate for me, and I'm so glad I no longer have to sleep my days away!  What an interesting field of medicine!  I believe what they know about sleep now is just a scratch on the surface on how it impacts our health and well being."