Because I don't have the diagnosis for sleep apnea, shift-work disorder or narcolepsy, my insurance won't cover Nuvigil. Like others on this post, it is making a BIG difference in my life. I have Seasonal Affective Disorder (SAD) and only need Nuvigil for about 5 months. I see others have diagnoses that are outside the official prescription indications. How are you getting your meds?