Personally I prefer frontline combie from the vets. A good few years ago I had a flea problem with my cat. I tried all the off the shelf products nothing worked.

Frontline did but I also used a household spray for furnishing, carpets etc.. Frontline isn't a quick fix as it doesn't kill the actual flea it breaks their cycle. For me its important to keep up with treatment as so far so good, haven't had any outbreaks since I started using Frontline.

My outdoor cat (sadly now passed away) I treated every month March to September and every 6 to 8 weeks during the colder weather, as he didn't go out as often.

Sue