Depakote was in a long line of prescribed medications that did nothing to my mental functioning. I talked to a number of people who were on it at a learning disabilities conference, and they described it as a medication which halted their experience of "colliding thoughts," but after I gave it a more than fair chance to fail decisively, I discontinued it.
Through the whole time I was on it, my psychiatrist arranged for me to have my blood serum levels routinely monitored. On paper, I was a perfect candidate for Depakote, but we're all an experiment of one, and it simply didn't help (or harm) my mental functioning in any way. In that respect, they might as well have been sugar pills.