Virbac Effitix® Against Fleas and Tick For Dogs 1,5-4kg 26.8/240 mg N4Virbac Effitix Antiparasitic solution for dropping on the skin of very small dogs. For use in dogs with flea and or tick infestations where repellent action is also required against sand flies and or mosquitoes. Antiparasitic solution for dropping on the skin of very small dogs. For use in dogs with flea and or tick infestations where repellent action is also required against sand flies and or mosquitoes. Effitix for dogs of very small stature, one