vet told me flea meds were advantage but it didn't work and the cat became ill. I had used advantage in the past. It's a good product. When I complained to her she said I wasn't using enough. I increased dosage . The cat never fully recovered. The product she sold was not labeled but she insisted it was advantage the cat fought me when I applied the meds and never did before and had never done that before. I have a little left. The needs to be stopped from selling this. I have suffered terribly because of losing my pet.