When I first tried Abilify it, too, knocked me on my butt. So my doc just let me cut the pills in half (started at 2.5 mg) and very gradually worked my up to where I am now, 10mg. No more drowsiness.
I totally know how you feel though. The first time I took abilify, the next day at the gym, I was so tired the weights were lifting me instead of vice versa.