Sulfite Migraine from Grape Juice - Please Help!

Does anyone know a quick counter attack for sulfur migraine? I usually stay away from stuff I know contain sulfites, but I just didn't think regular old grape juice had 'em. I know better know! I'm in such a world of hurt. I've tried drinking a ton of water and taking aspirin, cold and heat on my head and soaking my hands in HOT water.

Topamax only works on my MSG migraines and 5-HTP kills the low serotonin ones, but I don't know much about sulfite migraines. Does anyone know what the sulfites do to your body that cause the migraine? Is it a histamine thing? Then I'd need some B? 2? 6?

Any help would be wonderful!

GM