Allergy to flea treatment?

[Claire83]

Is it possible for dogs to have an allergy to flea treatment?

I think Roxy might have an allergy to Frontlline. She seems to get very itchy after treating her on the 1st of every month. If she is, (i'm popping in to the vet tomorrow morning) Are there any different brands that i could use?

I've only heard of Stronghold before which she had before we got her, or the ones you buy off the shelves in pet shops.

[mad 4 cockers]

I used Johnsons flea shampoo & tablets on my 2 but they still had them, because they were at the vets the beginning of the week I asked them for some treatment they gave me advocate (£21) which seems to have done the trick touch wood