I am sorry you are experiencing this effect of Depakote.
I had this side-effect and handled it by adding Citrucel with meals of brown rice and protein. This helped yet did not completely fix the problem.
I switched to Depakote Sprinkles. There is a manufacturer's coupon for the sprinkles with a low co-pay. I have been on the sprinkles formulation for 2 years without Depakote GI upset of any type.
I hope you find a fix.

WC