About This Product Bob Martin Clear Plus 268mg / 241.2mg Spot-on Solution for Large Dogs kills fleas and ticks, as well as biting lice. Each treatment kills fleas within 24 hours and for up to 8 weeks, and ticks within 48 hours and for up to 4 weeks. It contains Fipronil plus (S)-methoprene, an insect growth regulator, which inhibits the development of flea eggs, larvae and pupae for up to 8 weeks after application, preventing re-infestation of the pet's home environment. Effective Flea Control Regular treatment of all cats and dogs in the home, together with regular vacuuming of your pet's bedding and resting areas, is needed to protect your pet and home from fleas. If there is an existing and heavy infestation in your home, it may also be necessary to treat the home with an approved home flea product.Treat & Protect_x000D_ Large Dogs 20-40kg_x000D_ Kills Fleas for 8 Weeks_x000D_ Kills Ticks for 4 Weeks_x000D_ Kills Flea Eggs for 8 Weeks_x000D_ UK Authorised - Veterinary Medicinal ProductActive Ingredients: Each Pipette contains 268mg Fipronil and 241.2mg (S)-MethopreneSuitable For Large dogs 20-40kg and over 8 months old. Example breeds large (adult) dogs 20-40kg: Labrador, Retriever, Collie, Dalmatian. Directions for use Read the enclosed package leaflet before use for full instructions and all warnings, including user warnings. The directions for use and user safety warnings can also be found on the inner flap of the carton and should be read before each use.PRECAUTIONS: For external use only. For animal treatment only. Keep out of the sight and reach of children.