I would say if she has seen the vet before for them and you still have the meds, make a quick call to vet and ask him if you can still use it. If your dog has never been seen, I would call and see what they say, more than likely they will want to see him to give them right meds for it. I know, never any fun to take a dog into the vet (my dog is a 75 lb bunch of happy) but if she has never been seen for it, I think that is the best way to go.
Figaro, AKA Debbie
and also on Plurk
Let us so live that when we come to die even the undertaker will be sorry.
Mark Twain (1835 - 1910)