FRONTLINE TRI-ACT® – the premium spot-on treatment for dogs From the No. 1 against ticks and fleas* New parasite species from the south, year-round tick activity, and flying insects like sand flies and tiger mosquitoes require modern parasite protection that adapts to todays conditions. FRONTLINE TRI-ACT® reliably protects dogs against ticks, fleas, and flying insects such as mosquitoes and biting flies. As a solution applied to the skin (so-called spot-on) , FRONTLINE TRI-ACT® provides reliable protection against parasites for up to one month and can also be used on puppies from 8 weeks of age and weighing 2 kg. And: It also provides protection against new parasite species such as sand flies and tiger mosquitoes. FRONTLINE TRI-ACT®: Effectively repels ticks, fleas and flying insects. It protects even before ticks, fleas, or flying insects can bite. It is waterproof Prevents re-infestation by parasites