narcolepsy
"I have Idiopathic Hypersomnia with long sleep time. Before Nuvigil, I would sleep 16-20 hours per day, and nothing could keep me awake. This medicine has completely changed my life. I am on the highest dosage (250mg). At first, the medicine gave me a terrible headache and made me feel somewhat sick to my stomach. After about two to three weeks, the side effects almost completely subsided. I feel like a normal person now. I take the medicine early in the morning when my first alarm goes off. Sometimes, I fall back to sleep, or I can stay up and relax watching T.V or something. An hour or two later it is easy to wake. Energy throughout the day, and doesn't keep me up at night. This allows me to live "normally".  I feel little to no side effects and get sleepy before bedtime, energized all day."