Hi Krisakira,
Abilify also works on dopamine receptors and has the side effect of fatigue. not sure if all atypicals have that same side effect but i do think it's common. i'm on a med right now (Luvox) that is making me extremely exhausted. i slept 16 hours yesterday and am still exhausted. Anyhow, I haven't heard of latuda but i would say give it a week at least for the side effects to wear off to see if it will be of any use to you. If it doesn't you may want to talk to your doc about something like abilify or a different atypical. just a thought.
love and hugs,
Tara