Seresto 8-Month Flea & Tick Collar for Large Dogs Over 18 lbs., 1ct
- 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
8 reviews for Seresto 8-Month Flea & Tick Collar for Large Dogs Over 18 lbs., 1ct
Description
Product 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.
From the manufacturer
Kills and Repels
Kills and repels fleas and ticks by contact so pests don’t 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
Step 1
Be sure to attach the collar tight enough to ensure the collar is always coming into contact with your dog’s 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
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.
| Customer Reviews | 114,909 | 4,686 | 1,939 |
|---|---|---|---|
| Price | $59.92 | $50.99 | $21.92 |
| Form | Collar | Topical Drops | Flea Shampoo |
| Treatment or Prevention | Treatment + Prevention | Treatment + Prevention | Treatment |
| Application Frequency | Every 8 months | ― | ― |
| Kills Fleas? | ✓ | ✓ | ✓ |
| Kills Ticks? | ✓ | ― | ― |
| Kills Mosquitos? | ― | ― | ― |
| Kills Lice? | ― | ✓ | ― |
| Starts to Kill Fleas Within | 24 hours | ― | ― |
Additional information
| Weight | 0.109 lbs |
|---|
Amazon Customer –
5.0 out of 5 stars LONG THOROUGH REVIEW from a skeptical pessimist 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!!!Variation: Size: 1 Pack
Treefr0g –
5.0 out of 5 stars Avoided...now 100% loyal customer! I have a pit-lab mix pup, 10 months old. When he was about 5-6 months old, he started itching constantly, and literally chewing himself raw in places. Longer story short, I was using a drop on for fleas that didn’t work. I live in Central FL and have fleas year round. He brought fleas into the house, and they literally EXPLODED everywhere! My 6 indoor cats got infested, the carpets, everything. If this wasn’t bad enough, my pup developed a horrific allergy to fleas and their bites. He was miserable…constantly itching and chewing! Bald patches, and scabs everywhere.I sprayed the house, and also used an IGR. (Insect growth regulator) Flea combed everyone, everyday, several times. Drop-on for everyone, though I didn’t know at the time it wasn’t working. Capstar for everyone every 2-3 days. Baths for the pup every few days with medicated shampoos and flea shampoos. I became very frustrated because the drop-op wasn’t doing anything. It was a nightmare!!I looked at this flea collar along with others, but was afraid to try anything because of the horrible side effects some dogs had. My guy was already sooo miserable, that I didn’t want to take a chance on causing him more pain, etc.After weeks of this, and my pup being severely allergic to fleas, and having lost so much fur from chewing and scratching that he looked like he had mange or something on several areas of his body, I finally broke down and ordered a collar to try. I was very skeptical and doubted it could help, and definitely didn’t want to waste $60 in these tough financial times.WELL!! First of all, he had no bad reaction to it, thank goodnes!! And within a week of wearing it, he stopped 95% of the chewing and scratching. I was utterly amazed to say the least.It’s now a month later, and he’s 99.99% scratch free, and all his hair has regrown!! He’s once again shiny and silky black, and a very happy pup!!!While I’m extatic that the collar worked soooo well, I admit that I remain concerned about the chemicals that are going thru his body via the collar. However, anything that you use for fleas and ticks is going to introduce chemicals. While I fear cancer, having lost a loved dog to it last year, there’s no way that I want this pup to suffer like he was suffering before using this collar!! I want him to have a happy, comfortable life. He runs and plays on almost 2 acres, with year round fleas, ticks, and mosquitoes. He’ll be wearing this flea collar the rest of his life!!!I’ve read many many of the reviews. And because some people have said that the caller stops working earlier than 8 months, I’ll simply buy one and have it on hand in case this one stops working early. Even if it only works for 6 months, that’s only $10 a month for complete comfort for my pup. Totally worth it!!!Update 6/24/26:I continue using this for my pup. He’ll be 3 soon. It continues to work well. However, in my situation, it must be changed appropriately every 6 months. I know when it’s time because my guy starts itching again. I always make a notation on a sticky note of when I changed the collar, and I stick it on the empty can and put it in the closet. That way, when he starts itching again, I have a reference to how long he’s had the collar on. I also spray the house every 6 months with an IGR. That way I’m positive that my 5 indoor cats will not get any stray fleas he might bring in before they’re dead. EXCELLENT PRODUCT!! Well worth the cost!!Variation: Size: 1 Pack
Kierstyn Erwin –
5.0 out of 5 stars TRASH DO NOT BUY!!!!DO NOT BUY!!!!DO NOT BUY!!!!ABSOLUTELY TRASH!!! These may have worked for a week…. Six months is a JOKE! During that week we were also using capstar and topicals so may not have even worked that long.DO NOT BUY!!!!Literally only rated 5 stars so people would see this review.Irritated my dog’s skin, got dry patches, didn’t prevent fleas at all. Every time I gave baths they had a minimum of 25 fleas. DOES NOT WORK.Variation: Size: 1 Pack
Amazon Customer –
5.0 out of 5 stars Was skeptical about safety but am now at ease with using on my precious boy Let me start off by saying I am one to go for all natural treatment alternatives when possible and am pretty against using pesticides on my dogs. I had a boxer for 12 years and lived in 4 different places and never had a flea infestation. Fast forward to now, I have a 2 year old boxer and have also never had a flea problem UNTIL NOW. He was itching so frantically and I just thought it was allergies. Never occurred to me it was fleas, until I thought to check and sure enough, FLEAS. I was horrified and immediately bathed him in dish soap to get them off of my poor baby but I knew I had to start using a treatment to prevent reinfestation so I chose a popular all natural essential oil based spray that I already had on hand. After a couple days of using it (it needed to be reapplied daily) my dog got chemical BURNS on his skin from it so I had to discontinue it’s use. I looked into all options of conventional flea and tick treatment and didn’t love the idea of the squeeze ons since he has sensitive skin and definitely didn’t want to consider the prescription oral meds and have my dog ingest the pesticide. I had a couple family members have good success with the seresto collars and did some research and of course came across the lawsuit and the negative reviews of dogs that had horrible reactions so I was very nervous but I could not stand the thought of my baby being eaten by disgusting fleas either. Among my research, I also read up on negative reviews/reactions to the “all natural” stuff too and even pets that died from it and came to the conclusion that in most cases, most pets don’t have any negative side effects just like in human medicine. So I bit the bullet and ordered the collar and once I received it, I opened the packaged and let it air out for a couple days to make myself feel better and then finally put it on my dog. I was a nervous wreck monitoring him for the first few days waiting for him to start wobbling or acting weird. I also very frequently checked his neck for skin irritation. Nothing. The collar is not greasy, no smell. A little powdery residue but I make sure to wash my hands after touching it. I immediately noticed dead and dying fleas on his blanket in his crate over night every night for the first couple weeks. I also treated my entire 3 acre property with bifen l/p granules. It took almost a full month, of having the collar on, treating the yard and daily vacuuming, but this collar DOES work very well! I used a flea comb to monitor flea activity every day for the first few weeks and only a few fleas were found at a time and were usually slow or dying. Now, over a month later I am pleased to say that the last few flea combings have turned up zero fleas! No more itching and scratching and our baby is free of the nasty bugs. I also treated him for tapeworms shortly after applying the seresto collar just as a precaution. Overall I am very satisfied with the effectiveness of the collar and no side effects for my boy. We will see how long it lasts though. I’m not sure if I’ll need to keep it on him the full 8 months. I do live in FL so probably, but I did add a calendar reminder in 7 months to repurchase and reapply the collar. I chose this option because it’s long lasting. No need to reapply monthly like the topicals and I’m not feeding my baby poison. I knew if I saw issues with his skin or any weird effects I could simply remove the collar and give him a good wash in dish soap. But so far so good and I am very happy and at ease with using this collar to prevent fleas and ticks.Variation: Size: 1 Pack
santa_cruz_man –
5.0 out of 5 stars Unbelievable, a cure I was skeptical about these callers and they seem to be a little pricey however, from the moment we put them on not a single kick stayed on our dogs. They would normally pick up four or five of them on every walk we went on and we were there digging off ticks all the time always checking them if they’re hiding somewhere and I am not kidding we have not had a single tick since we put this amazing collar on. I cannot recommend it enough. We’ve tried other Things the pills the ointment whatever it doesn’t matter nothing works really. We still get takes no matter what medicine they’re on, but this collar has worked flawlessly for over seven months now.Variation: Size: 1 Pack
Big Bob –
5.0 out of 5 stars Worked within 1 day! Absolutely amazing My dog started acting weird, whining and scratching. I found a few fleas, gave her a bath and about a week later it seemed worse so I looked and found all kinds of fleas. I researched it and it says this is the top of the line flea collar. I was hesitant because of the price but I ordered it anyway. WOW within 1 day she was absolutely back to normal, not a flea in sight. No more itching, whining, nothing. Worth every penny. Says it lasts 8 months, so you figure about $120 a year to not have fleas, totally worth it. I would recommend it to anyone. I was literally amazed by how effective and fast it worked. If you’re dog or cat has fleas (not yet an infestation) I would definitely get this collar. It works 100%Variation: Size: 1 Pack
Aidan Sophie Goldsmith –
4.0 out of 5 stars Great My dogs are so less itchy now! Haven’t had any bad side effects, and the collars seem to be working great after two months. Will definitely buy again (just wished they looked a little cuter).Variation: Size: 1 Pack
Emmy –
5.0 out of 5 stars Excellent Flea & Tick Protection! “I’ve been extremely happy with the Seresto Flea & Tick Collar for my dog. It’s easy to put on, doesn’t have a strong odor, and provides long-lasting protection without the hassle of monthly treatments. Since using it, I haven’t seen any fleas or ticks, even during walks and outdoor activities. My dog wears it comfortably and hasn’t experienced any irritation. The 8-month coverage makes it a great value and gives me peace of mind knowing my pet is protected year-round. Highly recommend for dog owners looking for a convenient and effective solution!”Variation: Size: 1 Pack