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Seresto

Seresto Flea & Tick Collar For Dogs Over 18 lbs., Treatment & Prevention, Vet-Recommend, 8 Month Protection

  • Based on 110,421 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Apr 27
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Size: 1 Pack


Features

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

Description

Give your dog long-lasting protection against fleas and ticks with the number- one vet-recommended flea and tick collar. Unlike other flea and tick protection, Seresto large dog collars kill and repel fleas and ticks for 8 continuous months. Seresto collars make your dog’s comfort a priority by killing fleas and ticks through contact, so pests don't have to bite your dog to die. Existing fleas die after 24 hours of 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 for 8 months. Fleas and ticks not only cause discomfort; fleas can transmit bartonellosis or tapeworms. 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 over 18 pounds, and no prescription is 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. 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 8-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.

Brand: Seresto


Item Form: Collar


Scent: Unscented


Item Weight: 3.84 ounces


Active Ingredients: Imidacloprid, Flumethrin


Item Volume: 31.64 Cubic Inches


Allergen Information: Allergen-Free


Dog Breed Size: Large


Age Range (Description): 7 weeks and older


Global Trade Identification Number: 07


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1.56 x 4.5 x 4.5 inches; 3.84 ounces


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 86030594


Department ‏ : ‎ Unisex-Adult


Date First Available ‏ : ‎ January 28, 2013


Manufacturer ‏ : ‎ Elanco US Inc


Best Sellers Rank: #22 in Pet Supplies (See Top 100 in Pet Supplies) #1 in Dog Flea Collars


#1 in Dog Flea Collars:


Brand Name: Seresto


Age Range Description: 7 weeks and older


Global Trade Identification Number: 07


Manufacturer Part Number: 86030594


Model Number: 86030594


Unit Count: 1 Count


Included Components: Tick Collar


Warranty Description: 8 months


Manufacturer: Elanco US Inc


Item Type Name: Collar


Item Form: Collar


Scent Name: Unscented


Dog Breed Size: Large


Pet Type: Dog


Target Species: Dog


Item Weight: 3.84 ounces


Volume: 31.64 Cubic Inches


Allergen Information: Allergen-Free


Active Ingredients: Imidacloprid, Flumethrin


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • LONG THOROUGH REVIEW from a skeptical pessimist
Size: 1 Pack
This collar is PERFECT. Okay so I was really really super skeptical about buying this for several reasons: - I hate the thought of my two pups having to constantly wear an extra collar - I've tried the flea/tick collars from Walmart and they were greasy and had a weird smell but even worse, they did NOT work. - I've read some of the horrifying reviews - I'm just a skeptical person and simply didn't think this would work. BUT IM A BELIEVER NOW. For context, I have a 3yr old short haired ~45lbs pup (pitbull, lab, corgi mix) and and a 7yr old long haired ~30-35lbs pup (Lhasa Apso terrier mix). I live in Maryland where the weather is just always unpredictable. I feel like we have like 6 seasons instead of 4. We have woods in the back of our house which deer always like to frequent, along with a swamp/pond across the street. This spring and the start of this summer we had a monsoon season where afterwards, there was an annoying infestation of ticks (mostly Lone Star and Deer ticks). It was disgusting. I legitimately could not take my dogs out for a walk without finding at least 4 ticks on them afterwards and on me!!! And this is on top of treating my dogs with the monthly tick/flea topical oil treatment. That's how bad it was, which is what prompted me to buy the Seresto collars. (I bought Large for both of them) Once I did and placed them on my dogs, after maybe like 1-2 days, I have not found a single tick on them. I know that sounds so far fetched but I don't know what else to say because it's absolutely true. It does take about 1-2 days for the medication to get into the system (from experience and from *I think* what the package said) because I still did find a few ticks on them the next day. But after that, not a single tick! They've been wearing the collars for about 1.5 months now so I'm still keeping an eye on them (I plan on updating this review after 7-8 months to see if the claim of lasting 8 months is legitimate). Right now though, I am sooo happy. Now I want to address some of the other reviews I saw. After I saw some of the pictures of rashes this collar left on some dogs, I was worried, especially cause my smaller one already has exist in skin issues. But both are doing perfectly well with no skin issues from the collar. I don't want to be presumptuous and I may be totally wrong, but I'm thinking maybe the rashes the other dogs had were because they're not used to wearing collars? So they just kept itching at it? Maybe? I say that because for me at least, my dogs are used to wearing their regular collars nearly 24/7 since they were babies. So when I added the Seresto collars, they were unphased. But then again I'm also aware that just like humans, each dog reacts differently. Luckily, My dogs have no rash problems from the collars. As for some claiming that the collar doesn't work.. I'm not sure what to say other than that they really truly work for my dogs, and I live in a heavily tick infested area. It really is like night and day in terms of how well this collar works at preventing tick bites. Especially with my long haired dog since ticks would easily hide in her fur. The collar isn't greasy nor does it have a strong emanating odor. BUT it's still medicated so it still has a very slight residue to it but nothing that interferes with everyday life. I'm sold and plan on continuing with this product from here on out. NO MORE GREASY NASTY SMELLY TOPICAL MONTHLY TICK GREASE! **Side note** Make sure you read the packaging instructions carefully!! They mention a few things like about how the efficacy is shortened to something like 5 months for dogs who swim a lot, or how the collar is designed to unlatch if the dog pulls incase it gets stuck on something (which I thoroughly appreciate) so you CANNOT substitute this as a walking collar! The collar DOES unlatch if you hold onto it and your dog pulls (personal experience: guests came over, one jumps and I accidentally grabbed the Seresto collar and it unlatched). But you CAN reattach it!! So definitely take the time to read the package instructions. Hope this helps! I really loveeeee this collar. THANK YOU SERESTO!!! ... show more
Reviewed in the United States on July 16, 2016 by Amazon Customer
    • Great for killing ticks
Size: 1 Pack
I've used these collars for years with my two dogs and they work wonderfully. We've never had fleas and any ticks that bite them die relatively quickly. Great price for how long the product lasts compared to alternatives.
Reviewed in the United States on April 14, 2026 by katy
    • No fleas or ticks! Love it.
Size: 1 Pack
This collar is working GREAT! We live out in the woods and the dog usually gets covered in ticks. I have tried so many products and while they may keep some of the ticks off this is the first I have tried that actually has kept her tick free!! It was easy to put on her. It has stayed on and maintained it's quality even with her rolling in the grass and mud. I can't smell anything from it. She has not had any reactions to it. Skin around it appears normal. Our dog is 90lbs and had a large neck. This collar fit her perfectly and could easily have sized up or down. ... show more
Reviewed in the United States on April 12, 2026 by Jessie
    • Flea and tick collar .
Size: 1 Pack
I highly recommend purchasing these flea and tick collars . Work fantastic . Long lasting really worth the price .
Reviewed in the United States on April 17, 2026 by Paula hockenberry
    • Does not last as long as advertised.
Size: 1 Pack
They work amazingly well, however, none of the 3 that I bought lasted anywhere near 8 months. We’re on month 4 and I’m noticing fleas on the dogs when they get bathed.
Reviewed in the United States on April 6, 2026 by Angel Murphy
    • Never had any reactions, 4 years running
Size: 1 Pack
I have a german shepherd/ black lab mix (possible aussie or blue tick hound) who is about 70 pounds and 8 years old. When i was a kid my pets got fleas really bad and mom tried everything. And i mean everything. To avoid the expensive veterinarian care. She ended up buyung these and in the long run spending more than the vet bill wouldve been in total costs with all the treatments we tried, but less instantly with buying these alone. Turned around our pets conditions in less than a week (2 cats less than a year old but fully grown, a pitbull mix ~ 1 year old, a pom mix 3 to 5 years old). So i continued buying these for my pups for the last 6 years. One has passed recently due to other complications, a pomeranian mix about 9 to 11 years old (same one as at my moms house). None of the pets ive seen with these have had any reaction. I will say my larger dog has dry skin problems but she had that before i used these collars and before i met her. These collars dont make it worse. Super simple, one complaint. It advertises reflective attachments. Yeah theyre not so great. Break easy and are hidden in fur so it doesnt work. They also became a tangle spot on my pom. But the collars work very well and are worth the money on their own. My large dog is still flea and tick free with a year old collar, but its winter now. I can honestly say they are effective for 6 months to a year. A word to the wise: follow all warnings and instructions. Clip the collar to the length of your dog's neck plus about an inch or two, cinch it down in the rings on the collar and remove the collar before baths. Keep your dog from chewing the collar and licking you after putting it on. Wash your hands. If your dog develops a reaction based on an allergy include that in the review, because not every dog has an allergy. If your dog ate the collar or chewed on it include that too bc its different if its just a normal wearing collar situation that causes something and if a dog eats something theyre not supposed to. I wonder how many bad reviews are based on this? Seresto however should include a warning label for allergens if there isnt one already. The collar becomes a dark grey and a hard plastic when its expired. Fresh out of the pack its soft and light grey with a white powder coating. We tried cheaper collars, they dont work to kill established fleas and they dont prevent ticks or flea eggs. Theyre little more than citronella bug spray in effectiveness. Seresto collars have the added benefit (im guessing they cant advertise bc its not been scientifically tested) of repelling any blood sucking pests. Ive not noticed any mosquitoes on my dog and we moved to an area last summer where they have mosquito trucks bc the mosquitos are that bad (they didnt have the trucks in tennessee, do in illinois). Cheaper collars dont do that. Seresto collars all the way for us! Will update on the off chance my dog develops a reaction. ... show more
Reviewed in the United States on January 19, 2022 by Jordan Milton
    • Best Investment ever for my Fur Babies
Size: 1 Pack
Since starting to use these 5 yrs ago was the best decision for our 3 dogs. We were overrun with fleas one summer and out of everything we tried when we put these on them within 2 days I couldn't find 1 flea on any of them. They say to replace every 8 mos but a cpl of times it took a cpl of extra mos before I could replace them and they were still working well. Works well no matter their size as I have a 3 1/2 lb, 15 lb and a 40 lb. ... show more
Reviewed in the United States on April 10, 2026 by CG Anne Cardell

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