More vets choose Frontline than any other flea and tick treatment. They trust Frontline products to kill parasites fast and to go on protecting your pet. Frontline Spray is for the prevention of infestations by Fleas and Ticks. Frontline Spray controls infestations of biting lice. Routine treatment is advised to prevent flea infestations. Advantages of using Frontline SprayMore vets choose Frontline than any other flea and tick treatment. They trust Frontline products to kill parasites fast and to go on protecting your pet. Frontline Spray is a treatment for pets that gives long-lasting protection against fleas, ticks and controls biting lice It is convenient and easy-to-apply, it kills parasites fast and goes on protecting your pet. Frontline kills adult fleas on your pet within 24 hours and keeps your pet protected for up to 5 weeks Within 48 hours ticks are killed, minimising the risk of a tick-borne disease being transmitted to your pet.