I wouldn't go out of your way to tell people because it is none of their business, but if someone asks just say "Migraines. My hands shake when I get migraines." That's all they really need to know. You don't need to tell them you are on meds or what kind of meds you are on. You will only end up telling your whole life story if you starting telling them about the depakote and "isn't that for blah blah blah" and "yeah well truth is blah blah blah". Really, it's none of their business.