Hi Susan,
I think I'd give her a benedryl, personally. It will make her a little sleepy which will keep her off of it.
Our vet discourages aspirin, or even coated aspirin like Ascriptin. However, we have had other vets that recommend Ascriptin. Again though..a benedryl might do the trick for now especially if you don't have anything else handy.. Just my opinion, and what I'd do. Poor baby!