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Kills and RepelsKills and repels fleas and ticks by contact so pests don’t have to bite your dog to die. |
Same-Day EffectivenessStarts to kill and repel fleas within 24 hours of initial application and kills reinfesting ticks in as few as six hours. |
Vet-Recommended#1 selling, non-prescription flea and tick brand stocked by 8,000 vet clinics.* *Elanco – Data on File |
Step 1Be sure to attach the collar tight enough to ensure the collar is always coming into contact with your dog’s skin and hair. |
Step 2Use the 2-finger rule: insert the end of the collar through the buckle, then adjust the collar so that it is possible to hold two fingers comfortably between the collar and the neck. |
Step 3Pull excess collar through the loop(s) and cut off extra collar, unless it is on a growing puppy.See package insert for details. |
How long does it take to work on fleas?Seresto kills existing fleas on dogs within 24 hours after application. After those 24 hours, new fleas are killed within 2 hours. |
How do I know if the Seresto collar I purchased is authentic?It is crucial that pet owners purchase real and genuine Seresto products from authorized and trusted retailers. Counterfeit collars and their packaging look very similar to the actual product. Be sure the collar does not have a greasy feel or an odor. |
Does it expire?There is no expiration date required on the packaging. |
What are the key ingredients?The active ingredients in Seresto collars are Imidacloprid and Flumethrin: Imidacloprid to help protect against fleas and Flumethrin to help protect against ticks. No other product has this combination of ingredients. |
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 for eight continuous months. Seresto Large Dog flea and tick collars are recommended by veterinarians, stocked by 8,000 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 on contact, so pests don’t have to bite your dog to die. Existing fleas die within 24 hours of application while reinfesting fleas are killed within just two hours – before they lay eggs – preventing further flea infestation. Re-infesting ticks die in as few as six hours, and tick infestations are eliminated within 48 hours of the initial application. 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 and aid in the treatment and control of Sarcoptic mange. Fleas and ticks not only cause discomfort; they can also transmit bartonellosis, tapeworms or Lyme disease. Check the product label for information on potential side effects.
Seresto Large Dog 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 Large Dog 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.
