Seresto™ Flea and Tick Control collar for dogs

It's an innovative collar that is clinically proven to provide 7-8 months flea and tick protection for your dog. With Seresto, one collar is all it takes to give you peace of mind for 7-8 months.

Its innovative technology enables it to release controlled doses of the active ingredients over a long period of time. The ingredients are transferred to your pet’s skin and coat, and spread across the entire body, keeping them protected from fleas and ticks for 7-8 months. Clinically proven to kill fleas and actively repel and kill ticks through contact, so no bite is required for it to work².

No, you don't need a prescription to buy the Seresto Flea and Tick control collar. The collar used to be a prescription-only product meaning it was only available from licensed vets, but now it is freely available without a prescription. This has made the process of protecting your furry friend even easier. But it is important to make sure you are getting a genuine Seresto Flea and Tick Control collar – that’s why we recommend you purchase from your local vet practice, or a high street pet retailer  or agricultural store where you can speak with an SQP in store. If you are buying online, we recommend using one of our official partners.

There are two: imidacloprid, which kills adult fleas and flea larvae; and flumethrin, which repels and kills all life stages of ticks. Both ingredients act through contact without the need for parasites to bite¹.

In the Seresto cat collar, there is 12.5g of imidacloprid and 0.56g of flumethrin.

If you have only just put the Seresto collar on your dog, it can take up to 48 hours for Seresto to kill fleas already on your dog. Once your dog has worn the collar for at least 48 hours, any new fleas jumping onto your dog should be killed within 24 hours. 

If your dog is already suffering from a flea infestation before you apply Seresto, you can use a quick-acting flea treatment too, such as Capstar: flea tablets that start killing fleas within 30 minutes and can be used in combination with Seresto. Used together, Capstar will provide quick relief by killing live fleas, and Seresto will prevent re-infestation occurring for 7-8 months.

If there is an existing tick already attached to your dog before the collar is applied, it can take 48 hours for it to be killed. We’d recommend removing any ticks that are already attached to your pets before you use Seresto. Learn how to remove ticks from dogs to make sure you remove them safely.

If your cat has been wearing Seresto for over 48 hours, new ticks will be actively repelled and killed.

Seresto Flea and Tick Control collar protects your dog against fleas for 7-8 months and against ticks for 8 months in a single application. It is recommended the collar is replaced after this time to provide continued protection.

No. It's important to put a new collar on without any delay so that your dog is continually protected.

No, it doesn’t. The collar is odourless, so there are none of the unpleasant chemical smells you may associate with other flea and tick collars.

If you feel that you are not getting the results that you would expect from your Seresto Flea and Tick Control collar, here are a few points to consider.

If you have questions about any of the information here, or are still concerned please contact our technical services team on 01256 353131.

Ticks may still get onto your dog’s coat when they brush past them, even if they are wearing a Seresto Flea and Tick Control collar. The active ingredients work through contact, which means that ticks need to initially latch on to the pet to get exposed to the active ingredient, the product then acts to repel and kill them.  Attachment of individual ticks can occur occasionally, especially in animals that are walked in areas with very high tick burdens. However, the vast majority of ticks will be repelled and killed before they are able to bite.  

A small amount of mud or dirt on the outer surface of the collar would not be expected to affect its efficacy.  Any mud that creates a barrier between the collar and your dog’s coat may impact the efficacy of the collar.  If the collar does get dirty, you can simply wipe it down carefully with a moist cloth.

The collar’s active ingredients are bound within the collar matrix, rather than all being on the surface of the collar, however chewing of the collar should still be avoided.  In the unlikely event of the animal eating a collar, mild gastrointestinal signs (e.g. vomiting or diarrhoea) could be seen.  If this happens- speak to your vet for advice.  If your dog manages to get his own collar into his mouth it’s likely that it is applied too loosely. As a guide, you should be able to fit two fingers between the collar and your dog’s neck.

In rare cases, dogs may scratch at their collars on the first few days after fitting. Ensure that the collar is not fitted too tightly.  Mild reactions such as itchiness, redness and hair loss can occur but are only reported rarely, and symptoms usually resolve within one to two weeks, without the need to remove the collar. In some cases, temporary collar removal may be recommended until the symptoms have disappeared. In very rare cases in dogs, application site reactions such as dermatitis, inflammation, eczema or lesions may occur and in these instances, collar removal is recommended. Please consult your vet if you have any concerns. 

The collar is designed with a safety-release mechanism. It has a ratchet release mechanism, which allows it to widen should an animal become trapped.  The small dog collar has a two-step safety mechanism: in addition to the ratchet release mechanism it is also equipped with a pre-determined breaking point, so is able to snap completely under force.

Dogs wearing the collar should not be allowed to sleep in the same bed as their owners, especially children.

The Seresto Flea and Tick Control collar contains a special ‘polymer matrix’ within the collar and this keeps the largest amount of active substances within the collar so that there is a low amount on the outside. However, do not allow children to play with the collar, or to put it in their mouth.

The Seresto Flea and Tick Control collar releases its active ingredients from collar to coat for months at a time. The active ingredients kill fleas and ticks but are okay to use around cats (and naturally dogs themselves!).

No. Stretching of the collar for activation is not necessary. Simply fit as instructed around your pet’s neck for 7-8 months of protection against fleas and ticks.

Seresto doesn’t work this way, so there's no need to brush the collar anywhere on your pet. Simply put the collar around your dog’s neck and make sure you adjust it properly, to give you 7-8 months of flea and tick protection.

No, you shouldn’t attach a lead to the collar, as the force of your pet pulling against it would potentially open the safety mechanism. Use your normal collar in addition to Seresto Flea and Tick Control collar, and attach your lead to your normal collar.Seresto Flea and Tick Control collar has not been specifically tested with a name tag, so we do not recommend attaching them to your dog's collar. If attaching Seresto charms to the collar, please closely follow the safety instructions provided with them.

Absolutely. The Seresto Flea and Tick Control collar can be worn alongside your dog´s usual collar without compromising its efficacy, provided the Seresto collar is still in contact with the animal’s coat. 

We don't recommend doing this. To provide the optimum level of flea and tick protection with the collar, it should be worn continuously and replaced every eight months. However, if you’ve removed the collar only temporarily (e.g. during grooming), you can reapply it without any problems.

Used collars or any remnants should be disposed of in accordance with local requirements. The product should not be disposed of in watercourses. 

Seresto Flea and Tick Control collar can be used on puppies aged seven weeks and older.

Puppies grow at different rates and we recommend frequent checks of the collar and readjustment if necessary. Watch the video above to see how to fit your collar properly, and always follow the guidelines that are provided.

The product is not recommended for use in pregnant and lactating bitches.

Seresto Flea and Tick Control collar is water-resistant and does not need to be removed when a dog goes swimming or is bathed. The active ingredients are contained in the collar matrix and will not be released into water if your dog goes swimming. The ingredients spread through the lipid layer of the dog’s skin and hair and even if this lipid layer is partially washed off by bathing, the collar will quickly replenish the active ingredients and the pet will be protected again.

However, prolonged, intense exposure to water or extensive shampooing should be avoided as the duration of activity may be reduced. Studies show that monthly shampooing or water immersion does not significantly shorten the eight months’ efficacy duration for ticks after redistribution of the active substances in the coat whereas the product’s flea efficacy gradually decreased, starting in the fifth month.

Seresto Flea and Tick Control collar is water-resistant and remains effective if your dog becomes wet; there is no need to remove the collar for swimming. Studies have shown that monthly shampooing or water immersion does not significantly shorten the eight months efficacy duration for ticks after redistribution of the active substances in the coat, whereas the product’s flea efficacy gradually decreases starting from the fifth month. 

Seresto Flea and Tick Control collars are water resistant and remain effective if the animal becomes wet. It has been shown that monthly shampooing or water immersion does not significantly shorten the 8 months efficacy against ticks, however it can gradually decrease the collar's efficacy against fleas from month five. If your dog regularly swims or has baths it may be necessary to replace the collar sooner to ensure continued efficacy of the collar.