Divalproex sodium
"Depakote was given to me for onset postpartum psychosis and underlying bipolar 1 as a mood stabilizer. It did it's job. Wonderful results mentally, obsessive thoughts were all but gone and combined with my antipsychotic, it made my life much better. 

But, the weight gain was hellish. I have gained 11 pounds in two weeks, and am looking at switching at my appointment on Monday. So, not good if you are looking for a weight neutral mood stabilizer."