Seresto Flea & Tick Collar


Seresto Flea & Tick Collars are easy to use collars that provide 8 months of flea and tick protection for dogs and cats.


Seresto Flea & Tick Collar Basics

Seresto Flea & Tick Collar offers flea and tick protection for both cats and dogs. It reduces the risk of vector-borne disease transmission from parasites for up to 8 months. The collar uses a polymer matrix to provide dose adjusted release of two proven active ingredients: Imidacloprid, a potent insecticide and Flumethrin, an acaricide. The polymer matrix adjusts the amount of active ingredients depending on the concentrations within the lipid layer on the pet´s skin. This ensures a steady, low-dose release profile, providing optimal protection for up to 8 months. Laboratory trials found that the combination of imidacloprid and flumethrin is 100 times more effective against fleas than imidacloprid alone, based on in vitro studies. Seresto is water and shampoo resistant, but if your pet swims or is bathed more than one time each month, collars may not be effective for the full 8 months.

This is an over the counter product and, therefore, requires no prescription. It is available in three sizes: Cats, Dogs 0-18lbs (small), and Dogs over 18lb (large).

Seresto Flea & Tick Collar Directions

Use as directed by your veterinarian and follow the instructions printed on the product packaging. Remove collar from protective bag immediately prior to use. Make sure that there are no remnants from the plastic connectors inside the collar before use. Insert the end of the collar through the buckle and adjust the collar around your dog or cat’s neck without tightening it too tight. As a general rule of thumb, it should be possible to insert two fingers between the collar and your pet’s neck. Pull any excess collar through the loop, and cut off any excess length extending 1 inch, or 2 centimeters, beyond the loop. Seresto comes with three optional reflector clips to attach to the collar to help keep your dog visible at night. Evenly distribute reflector clips evenly distributed on the non-overlapping part of the collar.

Store at room temperature, protected from light and moisture.

Seresto Flea & Tick Collar Dosage

  • Cats: Use one Seresto Cat collar every 8 months.
  • Dogs 0-18 lbs: Use one Seresto Small Dog collar every 8 months.
  • Dogs Over 18 lbs: Use one Seresto Large Dog collar every 8 months.

Seresto Flea & Tick Collar Warnings

Keep out of the reach of children and pets. This product is not for human use. Do not reuse the Seresto container. Seresto collars should be disposed of in the original container. Do not use in cats less than 10 weeks old. Do not use in dogs less than 7 weeks old. Seresto should not be allowed to contaminate food or water, including during disposal. If you notice any behavioral or physiological changes in your pet while using Seresto collars, contact your veterinarian immediately.

If you have any additional questions regarding this product, please contact us at (877)220-6337. A member of our pharmacy staff will be happy to assist you!

Additional information


Cats, Dogs

Weight Range

0-18lbs (Small), All sizes, Over 18lbs (Large)