Couple of other things I thought of - difficult child 2's aggression went kaput on the Abilify, which was great, however, with no therapies, once the Abilify was weaned off (because, again, it does this, it's not for long term), he had no clue how to deal with the aggression.
With that being said, I will not commit that the Lithium alone is what nailed Dylan's aggression to the ground. I firmly believe that consistent discipline, social skills classes and his bi-weekly therapy, IN CONJUNCTION with the Lithium, is what squashed the raging/aggression.
Dylan knows good and well he puts his hands on someone in this house, he's going to pay for it, severely. I'm sorry, I just do not feel that medications, alone, are the "cure".