Milbemax is also a prescription only item, i think the offer Mark mentioned is at a vets, but mine have never mentioned it, and they know I have multiple cats, so not sure it is done everywhere. I have never used Advantage, so not sure if it is flea only, or if it is similar to STronghold which does some worming and ear mites. Frontline can be used for de-fleaing, and is available online without a prescription - i recently paid £16 for a 6 month supply, and I think at the vets it would be over £20, although I dont know how much these days as I dont buy from them.