Not that I'm aware of, but that doesn't mean they are all safe for you.
Example, my oldest son is allergic to watermelon. If he eats even the tiniest bit of watermelon his eyes swell shut, this windpipe constricts, and he breaks out in hives. The same holds true for anything with watermelon flavoring because it is the same chemical that gives watermelon its flavor, from the actual fruit or the lab, that is is actually allergic to.