insomnia
"Drowsiness but no sleep, so much worse than the Ambien and Lunesta that at least work a little.  Finally fell asleep at 6am, woke three hours later, felt like death all day.  Dizzy, drowsy, poor appetite, felt like my body was made of lead.  I'm often low energy but this was scary.  Took for one night, would rather stay awake all night than do it againz"