I couldn't take a split dose, had to take it all at night due to drowsiness... Every day without fail, I'd have a few hours' long exhaustion spell. I couldn't drive because my eyes would be crossing and closing on their own. Switching to night dose only helped. It also lowered my blood pressure too much... I couldn't tolerate anything but a low dose. It was weight neutral for me, which was nice. I switched to Abilify, eventually.