Effipro Duo External Parasite Treatment for Dogs in Pipettes. Effipro Duo antiparasitic pipettes for dogs are an effective treatment that combats flea and tick infestations in your pet. It offers protection for 7 weeks against fleas and up to 4 weeks against ticks. This external antiparasitic has a dual function Treatment and prevention. On the one hand, it prevents the multiplication of fleas and prevents their eggs from developing for 12 weeks after application of the pipette. Composition Fipronil 100 mg/ml. Pyriproxyfen 30 mg/ml.