Santa Cruz Animal Health offers cat topical insecticides such as Frontline Plus, Advantage II, Sentry Fiproguard, Advantage Multi and Bio Spot.
All the flea treatment I will ever need! Just once a month for inside cats along with a good dawn dish detergent bath once a month in their carriers or with thick rubber gloves like the dish washing kind... I add a tsp of dawn to the bathtub and let my three cats soak about 30 mins in it. Make sure the water comes to the top of their neck but not to their noses. ~ Mitchell