Does Seresto kill or repel fleas

Yes, seresto kills and repels fleas. It is a vet-recommended flea collar designed to provide eight months of protection from fleas and ticks. Seresto contains both an insecticide and a repellent, imidacloprid and flumethrin respectively, which work together to kill fleas on cats within 48 hours of application. Additionally, the ingredients in Seresto act as a repellant to other pests such as mosquitoes, lice, and mites. Specifically for pet dogs, Seresto provides protection against larvae, adult fleas, ticks, chewing lice and sarcoptic mange mites for 8 months without requiring monthly application as with most topical treatments. With its unique slow-release design that kills pests through contact with your pet’s fur rather than biting them first (which is common with other products), Seresto gives you reliable protection not just from existing pests but also new parasites looking to call your pet home.

How Does Seresto Repel Fleas?

Seresto is a revolutionary flea collar that repels fleas. It consists of two active ingredients that are released in controlled doses over an 8-month period. One ingredient targets adult fleas and the other targets larvae.

Seresto works by releasing small, odorless doses of the active ingredients from a plastic collar your pet wears around its neck. The most common ingredient is imidacloprid, which disrupts the nervous system of fleas and larvae by inhibiting their ability to ‘transmit messages’ so they can’t survive.

The other common ingredient found in Seresto collars is flumethrin, which helps protect against ticks as well as fleas. This second active ingredient repels both adults and larvae because it interferes with their sense of smell. This means even if they come into contact with your pet, they will be repelled instead of biting and laying eggs on your pet’s fur or skin.

What Are the Ingredients Found in Seresto?

Seresto is an effective flea and tick collar that is powered by two active ingredients: imidacloprid and flumethrin. Imidacloprid works to kill fleas and ticks at their earliest life stages and repels them from the host animal, while flumethrin helps repel ticks, mosquitoes and other biting insects.

When it comes to safety, Seresto has been extensively tested to ensure that it does not cause harm to pets or people when it’s used correctly. Its two active ingredients are stored in reservoirs that slowly release a low concentration of the products over eight months so animals seresto large dog can benefit from continuous protection against fleas and ticks. Plus, all components of the collar are non-toxic, meaning they are safe for pet skin contact!

How Long Does Seresto Last?

Seresto is a long-acting flea and tick repellent that kills and repels fleas, lice, ticks, and other parasites for up to 8 months. It’s easy to apply––simply place the collar around your pet’s neck and it immediately gets to work.

The length of Seresto’s effectiveness depends on several factors such as environmental exposure, temperature, humidity, activity level of your pet, and even the type of flea and tick infestation. Some animals can experience protection for more than 8 months, but many will need to reapply after this time frame.

To maximize the effectiveness of Seresto, you should also use monthly preventative products like topical or oral treatments and vacuum your home often. That way, you’ll help create an environment that’s unfriendly to pests and friendly to your pets!


If you’re looking for a safe, easy way to protect your pet from fleas and ticks, then Seresto is an excellent option. Not only does it provide long-term protection, but it also kills existing fleas and helps prevent new ones from taking hold on your pet.

By | 2023-10-29T19:07:20-04:00 October 29th, 2023|blog|