Seresto is a relatively new flea and tick collar containing two active ingredients–imidacloprid and flumethrin–that work together to kill these pests. While its effectiveness has been documented, it’s important to note that Seresto carries the potential for some unwanted side effects.

The active components of Seresto can produce skin irritation in a small number of pets, including redness, hair loss or excessive licking at or around the neck area where the collar was applied. If a pet experiences such reactions, immediately wash the area with soap and water, rinse again with warm water and speak with a veterinarian right away.

Rarely, ingestion of severe amounts of Seresto have been shown to cause seizures or respiratory problems in pets. In addition, sensitivity reactions may occur in some cats after contact with Seresto collars. If you observe any signs of an allergic reaction — vomiting, an unusual rash or hives on your cat’s skin — contact your vet immediately. Seek medical help for more serious symptoms, such as difficulty breathing or swallowing.

It is also important to keep in mind that exposure to Seresto collars can be hazardous to children if they chew on them and other animals if ingested by them (such as household pets). It’s essential to store the collar safely out of reach of both humans and other animals when not in use.

What is in the Seresto collar?

The Seresto collar is an insect-repelling product that prevents flea and tick infestations. The active ingredients in the Seresto collar are two chemicals called imidacloprid and flumethrin. Imidacloprid is a type of insecticide that kills tick larvae and adults, while flumethrin is a type of pesticide that repels external parasites like ticks and mosquitoes.

Together, these two powerful chemicals provide 8 months of non-stop protection from fleas and ticks for your pets. It’s also water-resistant so it won’t break down see here now or be washed away when your pet goes swimming or playing in the rain. With regular use, this collar can help protect your pet from painful bites, skin irritations and deadly diseases caused by parasites.

Are Flea & Tick Collars Safe for Dogs?

Flea & tick collars are generally considered safe for dogs, but they do have some potential risks. First of all, these collars are effective at killing fleas and ticks, but not 100%. There is still a chance that a flea or tick will escape the collar’s range and bite your dog. Additionally, some pets may be allergic to the chemicals in the collar which can cause itching or even skin irritation if contact is increased.

When worn correctly – meaning snugly around the neck but not too tight – flea & tick collars provide some degree of protection from infestation. However, it is important to note that these products should be used in conjunction with other methods of prevention such as regular brushing/grooming and vacuuming of your pet’s living area. The Seresto Collar is a type of flea & tick collar specifically designed for dogs that was created to be both safe and effective when worn according to instructions.

Can Seresto Side Effects Occur?

Yes, Seresto collar side effects can occur for some dogs. Like any other product that contains chemicals, there is the potential for an allergic reaction or skin irritation in a few cases. The insecticides used to manufacture the Seresto collar—imidacloprid and flumethrin—are generally considered safe, but some dogs may experience mild adverse effects. This may include skin rash, itching and redness at the site of application. Other mild symptoms may include confusion, lethargy and decreased mobility.

In more severe cases, an allergic reaction may happen that causes swelling of affected areas such as feet or face which should be addressed by seeking immediate medical attention. If you notice any symptoms after having your dog wear a Seresto collar it’s important to remove the collar immediately and contact your veterinarian for advise on how to address them safely.

How to Take Care With Seresto

When dealing with a Seresto collar, it’s important to take special care. Firstly, you should never get the collar wet, as this can compromise the efficacy of the product and create a dangerous situation for your pet. Secondly, you need to ensure that the collar fits your pet snugly — not too tight or else they may have difficulty breathing. Lastly, it’s essential that you monitor your pet while they are wearing their collar and check regularly for signs of irritation or discomfort.

In terms of general care with Seresto collars, it is suggested to replace them every 8 months for optimal effectiveness. You should also inspect your pet’s neck regularly for any skin irritations and be mindful of any allergic reactions if using an insecticide containing product such as Seresto. Additionally, when placing or removing the collar from your pets neck make sure to avoid contact with their skin so no residue gets on them from handling. Finally, always keep children away from collars as they could cause choking if swallowed due to their long chain length!


If you’re considering getting your dog a Seresto collar, it’s important to know about the potential side effects and to discuss these with your vet. The best way to keep your dog safe is to use the product as instructed and act on any sign of negative reactions quickly.