depakote has been used widely for bipolar since the 80's. It is not expensive. side effects are a b*tch, weight gain, hair loss and funked up skin. but it does work. folks who take it say they feel they have aged 20 yrs. I took it for about 2 yrs late 80's early 90;s and stopped it bc it wrecked my hair and skin and to say nothing of weight gain. the side effects gradually go away once you stop it.
http://en.wikipedia.org/wiki/Valproic_acid
do not under any circumstances stop a med without consulting your doc. I had to taper off this drug.