You don't treat cats like dogs. Neither do we.

Assurity® topical flea control kills 98–100% of fleas in just 12 hours1,2 and lasts a full month. Fast, effective, long-lasting protection for the cat you love.

Email & Text Message Reminder

Remember to apply Assurity monthly!

Receive an email or text message reminder from your cat when it's time to apply Assurity flea prevention.

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Interested in an oral option?


We have an oral flea control product specially formulated for dogs and cats.

Protect Your Cat from Fleas with Assurity®

Fleas can be a maddening problem for cats and cat owners. Your pet may be exposed to these blood-sucking parasites anywhere: in your backyard, walking around the neighborhood — even in your own home. Each female flea can produce 40 to 50 eggs a day, up to 2,000 in their lifetime3. So even a few fleas can turn into a major infestation in a matter of days.

Assurity for cats kills fleas fast, lasts a full month and is easy to use — all in a single flea control product.

While lethal for fleas, Assurity is gentle for cats and kittens eight weeks of age and older. And it's available only from your veterinarian — your best source of healthcare advice for your cat.

Learn more about Assurity flea control for cats.

Always read, understand and follow the label and use directions.

1. Elanco Study P09–015

2. Elanco Study B6FUS100001. Average efficacy at 12 hours post infestation.

3. M.W. Dryden, Integrated Flea Control: Flea Control for the 21st Century; presented at the North American Veterinary Conference, January 2001