Seresto Large Dog Flea and Tick Collar – Vet-Recommended – 8 Months Protection

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 dogs comfort a priority by killing on contact, so pests dont 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; theyre 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 theres no prescription needed. Theyre 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.

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Kills and Repels

Kills and repels fleas and ticks by contact so pests dont have to bite your dog to die.

Same-Day Effectiveness

Starts to kill and repel fleas within 24 hours of initial application and kills reinfesting ticks in as few as six hours.

Vet-Recommended

Seresto is the #1 veterinarian recommended flea & tick collar.*

*Based on survey data, 2023

How to

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Step 1

Be sure to attach the collar tight enough to ensure the collar is always coming into contact with your dogs skin and hair.

Step 2

Use 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 3

Pull excess collar through the loop(s) and cut off extra collar, unless it is on a growing puppy. See package insert for details.

Frequently Asked Questions

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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.
The product should be kept in its original packaging and stored as directed on the label.

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.

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Seresto Large Dog Advantage II Large Dog advantus Advantage Treatment Shampoo

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Price $59.89$59.89 $50.98$50.98 $63.98$63.98 $19.48$19.48
Form Collar Topical Drops Flea Soft Chew Tick and Flea Shampoo
Treatment or Prevention Treatment + Prevention Treatment + Prevention Treatment Treatment
Application Frequency Every 8 Months Monthly Do Not Exceed One Soft Chew in a 24-hour Period See Product Label
Kills Fleas
Kills Ticks
Kills Mosquitos
Kills Lice
Starts to Kill Fleas Within 24 hours 12 hours 1 hour On Contact