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Seresto® (imidacloprid + flumethrin) for Cats collar packaging container

Seresto® for Cats



Kills and repels fleas and ticks



Fleas, flea larvae and ticks




Active Ingredient

Active Ingredients:

imidacloprid and flumethrin


Seresto® for Cats is an odorless, non-greasy collar that kills and repels fleas and ticks on cats. Patented technology sets Seresto® for Cats apart from conventional collars, offering 8 continuous months of flea and tick protection. Seresto® provides the performance your clients expect from a monthly flea and tick preventive with the non-greasy, easy-to-use convenience of a collar.

Scratching may be observed occasionally in cats that are not used to wearing collars during the first few days after fitting. Clients should ensure the collar is not fitted too tightly. Slight hair loss and mild skin reactions due to the mechanical irritation of the collar may occur at the application site; this usually clears within one or two weeks without the need for collar removal.

Do not open until ready to use. Keep out of reach of children; do not let children play with the collar or reflectors. Choking hazard; contains small parts.

For external use on cats only. Do not use on other animals. Not intended for use on humans.


  • Fleas
  • Ticks


What are the active ingredients in Seresto® for Cats?

Seresto® combines two active ingredients, imidacloprid (10%) and flumethrin (4.5%). The Bayer Polymer Matrix enables Seresto® to slowly and continuously release the active ingredients in low concentrations for eight months.

What are the dosing and frequency guidelines for Seresto® for Cats?

The Seresto® collar for cats should be worn continuously for the eight-month protection period and replaced after eight months for optimal flea and tick protection. Clients should check the collar periodically and adjust the fit if necessary, especially with growing kittens.

What are the packaging specifications for Seresto® for Cats?

Shipping case: six sleeves of six collars. The EPA does not require an expiration date on the packaging for Seresto® for Cats. The product should be kept in its original packaging and stored as directed on the label.

Can Seresto® for Cats be used alongside identification collars?

Yes. Seresto® can be used alongside identification collars without damaging them.

How quickly does Seresto® for Cats begin working?

Seresto® for Cats kills existing fleas within 24 hours after application. After 24 hours of application, re-infesting fleas are killed within two hours — before they can lay eggs.


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