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Seresto for Large Dogs over 18lbs, 27.5" collar length product detail number 1.0 11503 11503 11503 11503 11503 11503 11503 11503 11503 11503 Watch the latest from Petmeds
At a Glance
  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea and tick collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 veterinarian recommended flea & tick collar*
  • Starts working within 24 hours to kill & repel fleas by contact so pests don’t have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea & tick protection
Seresto

Seresto - Flea & Tick Preventative Collar for Large Dogs

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$79.98
$59.99 See Price in Cart with code CARE25 tooltip Why don't we show the price? Sometimes the manufacturers do not allow us to show our price. Don't worry; you'll be able to see the price in checkout before you decide to buy it.
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$79.98
$59.99 See Price in Cart with code CARE25 tooltip Why don't we show the price? Sometimes the manufacturers do not allow us to show our price. Don't worry; you'll be able to see the price in checkout before you decide to buy it.
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Seresto for Large Dogs over 18lbs, 27.5" collar length product detail number 1.0 11503 11503 11503 11503 11503 11503 11503 11503 11503 11503 Watch the latest from Petmeds

* Recommended by our Veterinarian Advisory Board

At a Glance
  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea and tick collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 veterinarian recommended flea & tick collar*
  • Starts working within 24 hours to kill & repel fleas by contact so pests don’t have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea & tick protection
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About this product
1. Do flea and tick collars work for dogs?
Answer
Flea and tick collars can be effective at repelling and killing fleas and ticks on dogs, but their effectiveness can vary depending on the type of collar and the environment the dog lives in. There are two main types of flea and tick collars: chemical-based and natural. Chemical-based collars release insecticides that are designed to kill and repel fleas and ticks. Natural collars, on the other hand, use plant-based ingredients like essential oils to repel fleas and ticks. Chemical-based collars tend to be more effective at killing and repelling fleas and ticks, but they can also have potential side effects and may not be suitable for all dogs. You must follow the manufacturer's instructions carefully when using a chemical-based collar and watch your dog for any signs of discomfort or allergic reactions. Natural collars can be a good alternative for dogs with sensitive skin or those who cannot tolerate chemical-based collars. However, they may not be as effective as chemical-based collars in repelling and killing fleas and ticks. Also, flea and tick collars are just one tool in the fight against these pests. Regular grooming, cleaning your dog's bedding and living area, and using other flea and tick prevention products (such as topical treatments and oral medications) can also help keep your dog free from fleas and ticks.
2. What is the safest flea and tick treatment for dogs?
Answer
The safest flea and tick treatment for dogs will depend on several factors, including the age, size, and overall health of your dog, as well as the severity of the flea or tick infestation. It's always best to consult with your veterinarian to determine the best flea and tick treatment for your dog. There are several options for flea and tick prevention and treatment, including topical treatments, oral medications, collars, and sprays. Topical treatments are applied to the skin between the shoulder blades or at the base of the neck and are designed to kill fleas and ticks for up to a month. Some popular topical treatments for dogs include Frontline, Advantage, and Revolution. Oral medications are given to dogs in the form of pills or chews and work by killing fleas and ticks when they bite the dog. Examples of oral medications for dogs include NexGard, Bravecto, and Simparica. Flea and tick collars release chemicals that repel and kill fleas and ticks. Some popular flea and tick collars for dogs include Seresto and Scalibor. Flea and tick sprays are applied directly to the dog's fur and can be effective at killing fleas and ticks on contact. Some examples of flea and tick sprays for dogs include Adams Plus Flea & Tick Spray and Vet's Best Flea and Tick Home Spray.
3. Are dog flea collars safe for dogs?
Answer
Flea collars for dogs can be safe when used according to the manufacturer's instructions and under the guidance of a veterinarian. However, like any medication or treatment, there are some potential risks and side effects associated with flea collars that pet owners should be aware of. One of the biggest concerns with flea collars is the possibility of skin irritation or allergic reactions. Some dogs may be sensitive to the chemicals used in flea collars and may experience redness, itching, or inflammation at the site of the collar. This can be uncomfortable for the dog and may require treatment to alleviate the symptoms. In addition, flea collars can be hazardous if ingested by the dog or other animals in the household. Dogs may try to chew or lick the collar, which can lead to gastrointestinal problems or even toxicity if the chemicals are ingested. You must choose a collar that is specifically designed for dogs and follow the instructions carefully to minimize the risks associated with flea collars.
4. How long should a dog wear a flea and tick collar?
Answer
The length of time a dog should wear a flea and tick collar will depend on the specific product and the manufacturer's instructions. In general, flea and tick collars should be worn continuously for the duration recommended by the manufacturer to ensure maximum effectiveness. Most flea and tick collars are designed to provide protection for several months, typically ranging from 3 to 8 months. Some collars may need to be replaced sooner if they become damaged or wet, as this can affect their efficacy.
5. What are the side effects of a flea collar?
Answer
Flea collars for dogs can have potential side effects, although they are generally considered safe when used according to the manufacturer's instructions and under the guidance of a veterinarian. Some dogs may be sensitive to the chemicals used in flea collars and may experience redness, itching, or inflammation at the site of the collar. This can be uncomfortable for the dog and may require treatment to alleviate the symptoms. In rare cases, dogs may have an allergic reaction to the chemicals in the flea collar, which can cause symptoms such as difficulty breathing, swelling, or hives. If you notice any of these symptoms in your dog, remove the collar immediately and contact your veterinarian. If a dog chews or ingests a flea collar, it can cause gastrointestinal problems such as vomiting or diarrhea. In very rare cases, flea collars have been associated with neurological problems such as seizures or tremors.

What is Seresto for Large Dogs?

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 8,000 vet clinics* and have been trusted* by pet owners for nearly a decade. *Elanco Animal Health, data on file 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 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.

Please Note:

We cannot ship this product to Canada.

Suitable For:

Dogs (7 weeks of age or older, weighing over 18 lbs)

Benefits:

  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea and tick collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 veterinarian recommended flea & tick collar*
  • Starts working within 24 hours to kill & repel fleas by contact so pests don’t have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea & tick protection

How does Seresto for Large Dogs work?

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.

Cautions:

The collar should not be used on puppies younger than seven weeks old or on kittens younger than ten weeks old. If ticks are present on your pet when the collar is applied, they will not die within the first forty-eight hours and should be removed manually. If your dog or cat shows any sign of skin irritation or other reaction to the collar, remove immediately and consult your veterinarian.

Do not allow children to play with collar or reflectors, or to put them in their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and water after fitting the collar. People with sensitivity reactions to the ingredients of the collar should avoid contact with the collar. Choking hazard. Contains small parts. Do not place reflectors in mouth. Not intended for use on humans.

Storage:

Store in a cool, dry place away from children.

Who makes Seresto?

Elanco

What is the most important thing I should know about Seresto?

Seresto is an effective alternative to topical flea and tick control. It is an innovative new flea and ticks collar that releases continuous active ingredients for 8 months, ensuring your pet is protected against harmful conditions that fleas and ticks can transmit. Seresto kills existing fleas on dogs in 24 hours, and reinfesting fleas within 2 hours with protection against further infestations lasting eight months. Ticks already on your pet prior to treatment may not be killed immediately and may remain visible and attached. The prevention of infestations with new ticks starts within 48 hours after application of the collar. Seresto kills lice on dogs for one month, and aids in the treatment and control of sarcoptic mange.

How should Seresto be applied?

Remove the collar from the tin and laminated bag and place the collar around your pet's neck. Push one end of the collar through the loop and adjust for correct fit. Carefully snip off the excess collar with scissors.

What are the potential side effects of Seresto?

Pets may experience some temporary irritation at the site of product application. If signs persist or become more severe within a few days of application, consult a veterinarian immediately.

What should I avoid while applying Seresto to my pet?

Do not allow children to play with collar or reflectors, or allow to put them in their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and water after fitting the collar. People with sensitivity reactions to the ingredients of the collar should avoid contact with the collar. Choking hazard. Contains small parts. Do not place reflectors in mouth. Not intended for use on humans.

What if I overdose my pet on this product?

Seek emergency veterinary medical treatment if an overdose is suspected.

See more

Seresto for Large Dogs Directions:

  • Remove the collar from its packaging.
  • Unroll the collar and remove the small plastic connectors from inside the collar, ensuring that no remnants remain.
  • Insert the end of the collar through the buckle and loops.
  • Adjust the collar around your dog's neck until it fits comfortably on them.
  • Two fingers should fit beneath the collar and neck to ensure it's not too tight. Any excess length of the collar beyond an inch past the loops should be cut off, unless it is on a growing puppy, where some additional length may be needed for adjustment as the puppy grows.
  • Check periodically and adjust fit if necessary, especially on growing puppies.
Tip:

When fitting your pet's collar, make sure you can slip two fingers in between the collar and your pet's neck.

Seresto for Large Dogs Dosage:

Seresto for Large Dogs for Dogs
Weight Dosage
Over 18 lbs One Large Dog Collar per 8 months
Seresto for Large Dogs for Cats
Cats
Do not use!
Seresto for Large Dogs for Horses
Horses
Do not use!

Seresto for Large Dogs Ingredients:

Seresto for Large Dogs:
Active Ingredients (per collar) Amount
Flumethrin* 4.5%
Imidacloprid 10.0%
Other Ingredients 85.5%
*Trans Z-1/trans Z-2 Ratio: max 66% trans Z-1 and min 34% trans Z-2
Product Details
plus minus

What is Seresto for Large Dogs?

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 8,000 vet clinics* and have been trusted* by pet owners for nearly a decade. *Elanco Animal Health, data on file 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 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.

Please Note:

We cannot ship this product to Canada.

Suitable For:

Dogs (7 weeks of age or older, weighing over 18 lbs)

Benefits:

  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea and tick collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 veterinarian recommended flea & tick collar*
  • Starts working within 24 hours to kill & repel fleas by contact so pests don’t have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea & tick protection

How does Seresto for Large Dogs work?

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.

Cautions:

The collar should not be used on puppies younger than seven weeks old or on kittens younger than ten weeks old. If ticks are present on your pet when the collar is applied, they will not die within the first forty-eight hours and should be removed manually. If your dog or cat shows any sign of skin irritation or other reaction to the collar, remove immediately and consult your veterinarian.

Do not allow children to play with collar or reflectors, or to put them in their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and water after fitting the collar. People with sensitivity reactions to the ingredients of the collar should avoid contact with the collar. Choking hazard. Contains small parts. Do not place reflectors in mouth. Not intended for use on humans.

Storage:

Store in a cool, dry place away from children.

Who makes Seresto?

Elanco

What is the most important thing I should know about Seresto?

Seresto is an effective alternative to topical flea and tick control. It is an innovative new flea and ticks collar that releases continuous active ingredients for 8 months, ensuring your pet is protected against harmful conditions that fleas and ticks can transmit. Seresto kills existing fleas on dogs in 24 hours, and reinfesting fleas within 2 hours with protection against further infestations lasting eight months. Ticks already on your pet prior to treatment may not be killed immediately and may remain visible and attached. The prevention of infestations with new ticks starts within 48 hours after application of the collar. Seresto kills lice on dogs for one month, and aids in the treatment and control of sarcoptic mange.

How should Seresto be applied?

Remove the collar from the tin and laminated bag and place the collar around your pet's neck. Push one end of the collar through the loop and adjust for correct fit. Carefully snip off the excess collar with scissors.

What are the potential side effects of Seresto?

Pets may experience some temporary irritation at the site of product application. If signs persist or become more severe within a few days of application, consult a veterinarian immediately.

What should I avoid while applying Seresto to my pet?

Do not allow children to play with collar or reflectors, or allow to put them in their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and water after fitting the collar. People with sensitivity reactions to the ingredients of the collar should avoid contact with the collar. Choking hazard. Contains small parts. Do not place reflectors in mouth. Not intended for use on humans.

What if I overdose my pet on this product?

Seek emergency veterinary medical treatment if an overdose is suspected.

See more
How to use
plus minus

Seresto for Large Dogs Directions:

  • Remove the collar from its packaging.
  • Unroll the collar and remove the small plastic connectors from inside the collar, ensuring that no remnants remain.
  • Insert the end of the collar through the buckle and loops.
  • Adjust the collar around your dog's neck until it fits comfortably on them.
  • Two fingers should fit beneath the collar and neck to ensure it's not too tight. Any excess length of the collar beyond an inch past the loops should be cut off, unless it is on a growing puppy, where some additional length may be needed for adjustment as the puppy grows.
  • Check periodically and adjust fit if necessary, especially on growing puppies.
Tip:

When fitting your pet's collar, make sure you can slip two fingers in between the collar and your pet's neck.

Seresto for Large Dogs Dosage:

Seresto for Large Dogs for Dogs
Weight Dosage
Over 18 lbs One Large Dog Collar per 8 months
Seresto for Large Dogs for Cats
Cats
Do not use!
Seresto for Large Dogs for Horses
Horses
Do not use!
Ingredients
plus minus

Seresto for Large Dogs Ingredients:

Seresto for Large Dogs:
Active Ingredients (per collar) Amount
Flumethrin* 4.5%
Imidacloprid 10.0%
Other Ingredients 85.5%
*Trans Z-1/trans Z-2 Ratio: max 66% trans Z-1 and min 34% trans Z-2
Q&A
plus minus
1. Do flea and tick collars work for dogs?
Answer
Flea and tick collars can be effective at repelling and killing fleas and ticks on dogs, but their effectiveness can vary depending on the type of collar and the environment the dog lives in. There are two main types of flea and tick collars: chemical-based and natural. Chemical-based collars release insecticides that are designed to kill and repel fleas and ticks. Natural collars, on the other hand, use plant-based ingredients like essential oils to repel fleas and ticks. Chemical-based collars tend to be more effective at killing and repelling fleas and ticks, but they can also have potential side effects and may not be suitable for all dogs. You must follow the manufacturer's instructions carefully when using a chemical-based collar and watch your dog for any signs of discomfort or allergic reactions. Natural collars can be a good alternative for dogs with sensitive skin or those who cannot tolerate chemical-based collars. However, they may not be as effective as chemical-based collars in repelling and killing fleas and ticks. Also, flea and tick collars are just one tool in the fight against these pests. Regular grooming, cleaning your dog's bedding and living area, and using other flea and tick prevention products (such as topical treatments and oral medications) can also help keep your dog free from fleas and ticks.
2. What is the safest flea and tick treatment for dogs?
Answer
The safest flea and tick treatment for dogs will depend on several factors, including the age, size, and overall health of your dog, as well as the severity of the flea or tick infestation. It's always best to consult with your veterinarian to determine the best flea and tick treatment for your dog. There are several options for flea and tick prevention and treatment, including topical treatments, oral medications, collars, and sprays. Topical treatments are applied to the skin between the shoulder blades or at the base of the neck and are designed to kill fleas and ticks for up to a month. Some popular topical treatments for dogs include Frontline, Advantage, and Revolution. Oral medications are given to dogs in the form of pills or chews and work by killing fleas and ticks when they bite the dog. Examples of oral medications for dogs include NexGard, Bravecto, and Simparica. Flea and tick collars release chemicals that repel and kill fleas and ticks. Some popular flea and tick collars for dogs include Seresto and Scalibor. Flea and tick sprays are applied directly to the dog's fur and can be effective at killing fleas and ticks on contact. Some examples of flea and tick sprays for dogs include Adams Plus Flea & Tick Spray and Vet's Best Flea and Tick Home Spray.
3. Are dog flea collars safe for dogs?
Answer
Flea collars for dogs can be safe when used according to the manufacturer's instructions and under the guidance of a veterinarian. However, like any medication or treatment, there are some potential risks and side effects associated with flea collars that pet owners should be aware of. One of the biggest concerns with flea collars is the possibility of skin irritation or allergic reactions. Some dogs may be sensitive to the chemicals used in flea collars and may experience redness, itching, or inflammation at the site of the collar. This can be uncomfortable for the dog and may require treatment to alleviate the symptoms. In addition, flea collars can be hazardous if ingested by the dog or other animals in the household. Dogs may try to chew or lick the collar, which can lead to gastrointestinal problems or even toxicity if the chemicals are ingested. You must choose a collar that is specifically designed for dogs and follow the instructions carefully to minimize the risks associated with flea collars.
4. How long should a dog wear a flea and tick collar?
Answer
The length of time a dog should wear a flea and tick collar will depend on the specific product and the manufacturer's instructions. In general, flea and tick collars should be worn continuously for the duration recommended by the manufacturer to ensure maximum effectiveness. Most flea and tick collars are designed to provide protection for several months, typically ranging from 3 to 8 months. Some collars may need to be replaced sooner if they become damaged or wet, as this can affect their efficacy.
5. What are the side effects of a flea collar?
Answer
Flea collars for dogs can have potential side effects, although they are generally considered safe when used according to the manufacturer's instructions and under the guidance of a veterinarian. Some dogs may be sensitive to the chemicals used in flea collars and may experience redness, itching, or inflammation at the site of the collar. This can be uncomfortable for the dog and may require treatment to alleviate the symptoms. In rare cases, dogs may have an allergic reaction to the chemicals in the flea collar, which can cause symptoms such as difficulty breathing, swelling, or hives. If you notice any of these symptoms in your dog, remove the collar immediately and contact your veterinarian. If a dog chews or ingests a flea collar, it can cause gastrointestinal problems such as vomiting or diarrhea. In very rare cases, flea collars have been associated with neurological problems such as seizures or tremors.
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Judith Moravec
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Seresto collar
The seresto collar is a great alternative to the drops I used to use. This collar is effective. I live in Minnesota where ticks are increasingly abundant and I have only found 1 tick on my baby. That tick was dead. This will be the only product I will use. I also believe, this collar is healthier for her too.
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