ibromyalgia
"This drug has been a miracle for my pain but I cannot sleep more that 2-3 hours a day.  This is my 4th week at 900mg a day, I have tried taking them at different times of the day (within the 12 hr window). 4 or 5 hours after I take them I get a "boost" for an hour of semi hyperactivity that ends up in a little gloom from staring at the ceiling."