Give your dog long-lasting protection against fleas and ticks with a Seresto Large Dog flea and tick collar. Unlike other flea and tick protection Seresto Large Dog flea and tick collars kill and repel fleas and ticks for eight continuous months. Seresto Large Dog flea and tick collars are recommended by veterinarians stocked by 8000 vet clinics* and have been trusted* by pet owners for nearly a decade.Seresto Large Dog collars make your dog’s comfort a priority by killing fleas and ticks on contact so pests don’t have to bite your dog to die. Existing fleas die within 24 hours after initial application of the collar. After 24 hours any new fleas on the dog are killed within 2 hours with protection against further flea infestation lasting 8 months. The prevention of infestations with new ticks starts at 48 hours after application of the collar. 48 hours after application any new ticks are repelled and/or killed in as quickly as 6 hours. Seresto Large Dog collars protect against common pests like deer ticks American dog ticks brown dog ticks and Lone Star ticks; they’re also effective against chewing lice. Fleas and ticks not only cause discomfort; fleas can transmit bartonellosis or tapeworm. Ticks can transmit Borrelia burgdorferi which causes Lyme Disease. Check the product label for information on potential side effects.Seresto Large Dog flea and tick collars are for dogs at least 7 weeks old and there’s no prescription needed. They’re odorless non-greasy and water resistant to swimming exposure to rain or sunlight bathing and shampoo treatment.**Seresto is a trademark of Elanco or its affiliates.*Elanco Animal Health data on file**Seresto Large Dog is water resistant and remains effective following a shampoo treatment swimming or after exposure to rain or sunlight. Under normal conditions effectiveness lasts for 8 months. In order to maintain an eight-month duration dogs must not be bathed more than once per month. For dogs that swim once a month or more the control duration is reduced to 5 months for flea control and reduced to 7 months for tick control.Seresto is rigorously regulated worldwide with your pet in mind. Fake Seresto collars are ineffective and can put your furry friend at risk for expensive flea and tick infestations and painful flea and tick bites which can result in transmission of certain diseases. One of the best ways to make sure your Seresto collar is authentic is by making sure it’s “Sold By” one of our authorized sellers. Check out the trusted list before shopping: Amazon.com Petco Entirelypets Petstoreusa Pets Go Here - Pet Store Heartland Veterinary Supply.