Some snackwells make me dizzy too. But I react to sugar. It's possible that batch has something in it, or they made it with too much sugar. ON the other hand, you may want to check with your doctor to see how your own blood sugar is.

If you are used to eating this particular product many times like you say and it's a once I could see but two lot numbers and I think they changed the product, upped the sugar or your own body is reacting. Check the ingredients too with other packages of the same in different lots.

Good luck, I hope you get a response from them.