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Seresto Large Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Over 18 lbs.|8 Months Protection

Item: 83857960
Availability: In Stock

Was: $88.99$67.98You Save: $21.01!(24%)


Make your dog's health and comfort a priority with the long-lasting protection of the Seresto Large Dog flea and tick collar. Unlike other flea and tick protection, Seresto Large Dog flea and tick collars are vet-recommended, stocked by 8,000 vet clinics,* and have been trusted by pet owners for nearly a decade to successfully kill and repel fleas for eight continuous months.

The Seresto Large Dog collar works to kill pests on contact within 24 hours of application, eliminating them before they bite your dog or lay new eggs.

Seresto Large Dog collars are for dogs at least 7 weeks old.

Seresto Large Dog is a trademark of Elanco or its affiliates.

*Elanco Animal Health, data on file

Key Benefits:

  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 selling non-prescription flea & tick brand, stocked by 8,000 vet clinics (Elanco Animal Health, data on file)
  • 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 Flea & Tick Collar for Dogs

Flumethrin* 4.5%
Imidacloprid 10.0%
Total 100.0%

*Trans Z-1/trans Z-2 ratio: max 66% trans Z-1 and min 34% trans Z-2

Useful Information

One collar per animal to be fastened around the neck. Remove the collar from bag directly before use. Unroll collar and make sure that there no remnants from the plastic connectors inside the collar.

seresto dog collar instructions

  1. Insert end of the collar through the buckle. Adjust the collar around the animal's neck without tightening it too tight or leaving it too loose.
  2. As a guide, it should be possible to only insert 2 fingers comfortably between the collar and the neck.
  3. Pull excess collar thru the loop(s). Collar length of greater that 1 inch (2 cm) beyond the loop(s) should be cut off unless it is on a growing puppy, where some additional length may be needed for adjustment as the animal grows.
  4. After application of the collar, three reflector clips may be fixed permanently to the collar to increase the animal's visibility in the dark. Take the clips out of the bag. The clips should be evenly distributed on the non-overlapping part of the collar. The clips are correctly applied when a clicking sound is heard. For safety reasons once the reflectors are fixed to the collar the clasp closes permanently and cannot be re-opened.

Video Example of Collar Application

The collar should be worn continuously for the 8 month protection period. Check periodically and adjust fit if necessary, especially when puppies are rapidly growing. Rarely, mild application site reactions may occur, such as scratching, redmess and hairloss, which usually recover within 1-2 weeks without the need for collar removal. In some cases, temporary collar removal and bathing may be recommended until symptoms have disappeared. In very rare cases, application site reactions, such as dermatitis, inflammation, eczema or lesions may occur. In these instances, immediately. If your animal is on medicaiton, consult your veterinarian before using this or any other product.This collar is designed with a release mechanism. In the unlikely event of a dog being trapped, the dog's own strength is sufficient to widen the collar to allow for quick release. Replace the collar after 8 months for optimal tick and flea protection.

It is a violation of federal Law to use this product in a manner inconsistent with its labeling. Do not contaminate feed or food.

Occasionally slight itching may be observed in animals that are not used to wearing collars in the first few days after fitting. ensure that the collar is not fitted too tightly. Slight hair loss and mild skin reactions due to the mechanical irritation of the collar may occur at the application site which usually recover within 1 or 2 weeks without the need for collar removal. For further guidance regarding individual animal sensitivities. In case of loss of collar, a new collar may be applied immediately. Do not attach a leash to the collar as this may cause breakage.

Storage Directions

Keep the collar in the bag and in the outer packaging until use. As with any pesticide product, do not allow small children to play with the collar or reflectors, or to put them into their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and cold 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 collar or reflectors in mouth. Not intended for use on humans.

For external use on dogs only. Do not use on other animals. Do not use on puppies under seven weeks of age. Do not get this product in dog's eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, breeding, pregnant, or nursing animals. Individual sensitivities, while rare, may occur agter using ANY pesticide product for pets.

The Bayer Polymer Matrix System ensures that both active ingredients are slowly and continuously released in low concentrations from the collar towards the animal. This avoids peak concentrations and ensures that concentrations of both active ingredients are present in the dog's haircoat during the entire efficacy period. The active ingredients spread from the site of direct contact over the entire skin surface.

Seresto® FAQs

When can I bathe my dog after application of Seresto® for dogs? We recommend bathing BEFORE applying product. Seresto® 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. There is no need to remove the collar for bathing. Please use a non-stripping, pet shampoo.

How often can I allow my dog to swim when using Seresto® for dogs? Seresto® 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. 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. There is no need to remove the collar for swimming.

How often can I bathe my dog when using Seresto® for dogs?

  • We recommend bathing BEFORE applying monthly product. The product can be applied once the pet is towel dried.
  • We suggest using non-stripping shampoos that are specifically designed for use on pets.
  • 'Non-stripping' shampoos are generally soap free formulations designed for general cleansing. Bayer makes a variety of shampoos that are non-stripping, general cleansing shampoos.
  • Seresto 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. There is no need to remove the collar for bathing.

Customer Reviews

Review Summary
26 Reviews
73% (19)
0% (0)
0% (0)
8% (2)
19% (5)
73% Recommend this product (19 of 26 responses)
By David H.
Chocorua New Hampshire
Awesome Collar
July 16, 2015
I live in The White Mountains of New Hampshire where deer ticks are very heavy along with fleas. Just a day after buying for all three of my dogs ticks were dropping off and no sign of any fleas. They are by far the best product I have found. I will be sure to tell all pet owners I know about them. You will be doing your four legged family a favor getting this collar.
No more Ticks or Fleas. Expensive but well worth it.
By Kim R.
Manchester, Kentucky
Seresto collar for dogs
September 18, 2021
I have used this product for many years on many multiple dogs of mine @have never had any problem w/it. I need something really good for ticks in spring @it really works well. Kim
By Lorenzo
Baton Rouge, Louisiana
Do not waste your money
April 11, 2021
I purchase the Seresto Flea and Tick Collar here on 3/17/2021. After reading the reviews I thought
l would give it a try. I get my dog a bath on 3/27/2021, once he dried, I put the Seresto Collar on him. Our experience so far has not been good as of 4/11/2021. Last week I had to give him a different treatment. He was biting and scratching himself. He still has on the Seresto Collar. To me the claims for this collar are false. Kills fleas in 2 hours. Kills re-infesting fleas in 2 hours. I looked at him this morning and he has flea bites all over his body. I wished that I had never purchased this collar. It has yet to kill any fleas.
None It's an over priced flea collar that do not kill fleas.
By Dave
July 1, 2020
No issues at all.Very happy.
I didnt get my discount and i mentioned it and still nothing.The coupon or discount doesnt exist.
By Bree
Hudson, MA
Just picked two ticks off my dog
May 30, 2019
Went for a mile long walk, she stuck her head in a bush for less than two seconds and came out with a tick on her nose that I noticed right away and got it off her... came home and searched her only to find another on her leg which DID bite her.

Not only is Seresto an ugly collar for my princess, it doesn't work... I'm not happy right now.
- Ugly - Doesn't work
By Ronda
Powell Ohio
Used several years, but
May 27, 2019
I have used Seresto for the past three years. Not once have I seen a tick, since purchasing, on either of my dogs.
But this year so far, three ticks have been carried home. We have not changed where we walk/hike. We do not walk in brush, but the dogs have always liked to smell along the edge of brush and woods.
I have told several families about how wonderful this product is, yet this spring I am finding myself very disappointed.
I have in the past not once seen a tick on either dog. This year, 2019, had three ticks on dogs.
By Grayson
Kansas City
Seresto TRULY lowest price
April 18, 2019
Just as promised. 15% lower than anyone else, no shipping, no tax. Perfect.
By Vic
New York
Removed it after a couple of days
April 8, 2019
The first 8 months were great, the second not the same. Made the dog extremely lethargic, stopped eating and was like a zombie.

Removed the collar and gave him a thorough bath with Dawn dish soap and he came back to his usual playful self.

Tossed away the collar will never use this product again.
External Side effects
By Jesse
Atlanta, GA
Soresto doesn’t provide expected protection
June 4, 2018
Last year our groomer recommended Soresto, and we immediately purchased one for our lab. We did not find any ticks so purchased another this year, about 5 weeks ago. Today the groomer found “the largest feeding tick she has seen” in her 15 years of grooming. I called Soresto and was told no product is 100% effective and pets in the south should be checked for ticks every time they go outside and we should purchase/use Advantix in combination with the Soresto collar. No mention of satisfaction guaranteed, which is advertised on the Soresto collar.

I will not be buying anymore of these expensive collars! Very disappointed.
Merchant Response:So sorry to hear about your experience with your lab. K9 Advantix is an excellent option as well. Wishing you and your lab the best.
By Nellie
Kalamazoo, MI
Quality Product
February 14, 2018
This flea and tick collar was recommended by our vet and it really works well! It's non-irritating to the dog, easy for her to wear, and it lasts for several months.
It can get wet (rain, swimming) with no problem to effectiveness.
By CMc
Easy, effective
September 2, 2017
The Seresto collar is easy to use (and it stays on the dog). It is effective, i.e., it works!
By Katrina W.
Hillsdale, NY
What a savings
June 22, 2017
I have three dogs and have been looking at these collars for them. This was the cheapest site and they shipped right away.
I had them in no time and my dogs have not had any issues with fleas or ticks since. I love the reflectors as well.
Don't have to worry for the next 8 months Reflectors work well
By Karen
Osceola, IN
Flea Collar
May 27, 2017
I have bought this product before for my dog but at a higher price so liked your pricing. Also like the convenience that it last 8 months and you don't have to put stuff on their skin - didn't care for that. Highly recommend!
By karen J.
Great collar!!
May 15, 2017
Best collar ever! Only the best for my pup!
They work for 8 months, not taken orally or rubbed on topically! Collar comes off easily and is expensive to replace.
By karen J.
Great price!
May 15, 2017
3 pack is well worth the price! Best collars ever!
By mike g.
March 24, 2017
Easy and. Effective
It works.
By Jane
Orange, VA
Worth the price
March 18, 2017
I have bought a Seresto collar for both my dog and my cat, and they work great. When my vet recommended them I was hesitant because of the price, but after I did the math I realized this would actually be cheaper in the long run. (Plus I could put it on them and forget about it for 8 months.) My cat has severe flea dermatitis in the summer, so my vet suggested the collar combined with a monthly dose of Frontline, and it has really helped!
Merchant Response:Thank you for your feedback Jane! It's currently flea and tick season so please keep an eye out for any discounts that may become available. We want to provide the best products at the most affordable prices.
By S
Spring, Texas
No fleas!
March 15, 2017
We live in Texas where fleas are part of living here., Seresto flea collar has keep both of my dogs free of fleas for 8 months. I just reordered my replacements for
Stella and Chloe. We will be using these from now on. Just don't want to put the pills in their bodies any longer. Love love love Seresto! You won't be diss appointed. So easy to put on and they send a sticker to put on your calendar to remind you to reorder. Brilliant!
Merchant Response:There are no fleas on me, There are no fleas on me, there may be bugs on some of those pugs, but there are no fleas on me. LOL, just read your review and made me think of the commercial's theme song. Thanks for the glowing endorsement!
Easy, no odor, great price
By Scott
Boston, MA
Good value compared to vet.
March 9, 2017
This is the second year we've used Seresto collars on our dogs. Seem to be more effective than Frontline. We saved about 40% over what the vet charged us last year even with rebates.
Easy to use. No monthly maintenance required like Frontline. No mess.
By B S.
Rhode Island
Very Dangerous Product: Seizures
July 21, 2016
We used Seresto collars last year with no problems. This year within a few days of putting new collars on, both Labradors developed severe itching at site. The older girl, age 10, very healthy as verified by Vet and bloodwork, etc., developed extreme bloody sores on neck and cheeks, extreme panting, and then had a first ever gran mal seizure and had to be put down, even after collar removed for several weeks. Many more pet owners have had this problem and stated it on Amazon reviews. We now only use wondercide, an all natural cedar oil product.
Very dangerous product. Can destroy your pet.
By Pets N.
Keeps ticks & fleas off our outdoor cat.
June 10, 2016
I bought this collar because it is excellent at protecting our outdoor cat from fleas and ticks. We just bought it and put it on the dog. She stays in the house most of the time, so I am hoping it does as good a job for the dog as it does for the cat.
By Sheryl
Altoona Pa
Sees to flea and tick ca
April 17, 2016
used it on our dog last year,it did what they said it would do. Our dog is in fields and woods a lot we had absolutely no problem with fleas or ticks
no worries for 8 months
By Ray
Kills fleas, dead!
February 27, 2016
Last year my labs were infested with fleas after visiting a ranch in Texas (no fault of the rancher). The dogs were out running the ranch and ran through a large colony of fleas. We bought these collars last year and within a day all fleas were gone and the dogs were at peace again. I bought this years collars from Health Pets because of the price and the free shipping. I also like the reflective markers on the collars. I can find the dogs in the dark with a small flashlight and if by chance they should get out on the road, motorist will see them too.
Great price. Free shipping. Collars work GREAT! There are no cons.
By Temperance
Birmingham, AL
August 11, 2015
This product had absolutely no effect on repelling fleas. I purchased three at the recommendation of the groomer for my indoor dogs and am very disappointed.
By Jennifer
Lascassas, TN
Seresto collars
August 6, 2015
Great prices, no shipping makes this a very affordable flea treatment. Great service!
Brentwood, New Hampshire
Seresto Flea & Tick Collar
April 12, 2015

Customer Q&A

1 Question & 1 Answer
from Pennsylvania asked:
October 16, 2018
I was told by Bayer that there are counterfeit collars on the market sold on E-bay and some on Amazon all made in China at a much lower price and are not effective at all. The container is almost a perfect match. Buyer must beware. These are the good ones. John
1 Answer
Hello John, yes these collars are authentic. We get these directly from the manufacture.
Submitted by: Customer Service on May 22, 2019