My psychiatrist added depakote on top of my other mood stabilizers a few weeks ago. It calmed me down at first but a few weeks in, it started feeling like I was constantly intoxicated.  The exact buzzy feeling I get with alcohol. My thought process got very slowed down, to the point where I felt like I couldn’t function at work. 
I went off it about a week ago and am feeling normal again, with lingering slowness of thought.