Keep your small and very small canine friend away from fleas and ticks with Fiprex Duo! Effective, easy to use and convenient, Fiprex Duo offers protection and action within 24 hours from the moment of application. It is effective against fleas and ticks, as well as malophagous lice, while also managing flea cysts and larvae. Benefits: It contains two active ingredients: Fipronil and S-metropren. It is very easy to apply, directly to the skin, at the nape of the neck. Provides protection against ticks for up to 4 weeks. Kills fleas up to 24 hours from the time of application Provides protection against fleas, ticks and lice immediately after application. It is a simple to apply topical treatment that kills fleas and ticks and helps control infestations of mange lice. It works quickly to not only rid your dog of these pests, but continues to work to prevent them from returning to your dogs skin.