Owww! I've never heard of this, what a drag.

There is a gum for dry mouth, I bought some for a friend when the medication she was taking caused awful cotton mouth. I found it at REI of all places.

http://tinyurl.com/6bpj2

There's also something called Biotene, they make a sugar free gum, toothpaste, etc. Don't know how well it works though.