My doctor prescribed Prozac for me as a migraine preventative once. Prozac tends to keep people awake, so it's usually taken in the morning...for me it was like my usual cup of coffee in the morning. Of course, everyone does react differently and can feel drowsy on Prozac, but it is not a very common side effect.
Have you ever tried taking any vitamins for an energy boost before? Those can be useful when on meds that make you tired.
Dx: Chronic Daily Migraines & Chronic Depression
Daily meds: Trazadone, Norpramin & Cymbalta
PRN meds: Tylonal #3