Clément Thékan Fiprokil Duo 268mg/80mg Big Dogs 4 Pipettes is a solution in form of pipette with anti-drop system for spot-on for big dogs (20 to 40kg). It is used to treat infestations by fleas alone or against those by fleas and ticks.This insecticide treats and prevents infestations:by fleas (Ctenocephalides felis). An application prevents from all infestation during 7 weeks. It prevents the multiplication of fleas by avoiding the development of eggs in adult fleas during 12 weeks after application,by ticks (Ixodes Ricinus). An application allows an acaricide efficacy that persists during 2 weeks against Ioxides ricinus and during 4 weeks against Dermacentor Reticulatis and Rhipicephalus sanguineus. If some species of ticks (Dermacentor reticulatus, Rhipicephalus sanguineus) are present at the application, they may not all be killed within 48 hours.