hypersomnia
"My doctor wanted me to try a long acting morphine, taken every 12 hours. I was concerned about the sleepiness issue as I was taking many pain medications. So she also prescribed 250 mg of Nuvigil. Like some of these reviews, it was fine for a while but I started noticing late afternoon sleepiness. I was already on the highest dosage. My doctor said it was okay to take half the tablet with the medications I take on rising in the morning and the other half later in the morning. It's made a wonderful difference in my ability to focus and stay awake during the day and I don't have any problems falling asleep at night. It's greatly improved my quality of life and ability to continue working."