Frontline Tri-act Spot-on solution Dogs from 10 to 20 kg Fleas and ticks Biting flies Sand flies Mosquitoes Pipettes 2ml x6 Frontline Tri-Act spontaneous solution for dogs from 10 to 20 kg. 3 in 1: Repel, Treat, Prevent. For the treatment and prevention of flea and/or tick infestations when repellent (anti-bite) activity against sand flies, biting flies and/or mosquitoes is required. Frontline Tri-Act kills adult fleas within 24 hours of their arrival on the animal. Kills ticks within 48 hours of their arrival on the animal, to limit the risk of disease transmission. The risk is maximum 48 hours after the tick has attached itself to the animal. Frontline Tri-Act is also effective against ticks that transmit canine piroplasmosis. Repels sand flies, mosquitoes and blowflies. This medicine is also effective as an insecticide against sand flies and midges.