Eliminate Over 99% of Fleas with Activyl® Topical for Dogs and Cats.

Activyl® Topical for Dogs and Cats (indoxacarb) is a flea treatment that is highly effective at killing fleas and preventing infestation.1,2 Activyl kills all flea stages - egg, larvae and adult.1,2 Find out more about Activyl or Activyl Protector Band for Dogs to find the right fit for your pet.

Also available, is Activyl Protector Band for Dogs (deltamethrin) - a long-lasting flea and tick collar that protects your dog for up to 6 months.

Activyl® Topical for Dogs and Cats

Try the monthly topical flea control that uses enzymes inside the flea to activate the full flea-killing power.

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Activyl® Protector Band for Dogs

Achieve long lasting, water-resistant flea and tick control that also repels mosquitoes for up to 6 months with this no-mess and easy to apply solution.7,8

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Keep Fleas & Ticks Off Your Pet

Fleas are tiny pests that can create big problems for your pet. Get the facts, learn how to check for fleas and find the best treatment options for your cat or dog.

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Ticks can be found right in your own backyard. Research ticks in your area, tick-borne diseases, how to help prevent ticks in your home and what to do if you find a tick on your dog.

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MyPet understands pet parents can be busy people too! From new additions to long-time family members, MyPet has the tools you need to take care of your favorite furry friends.


Keep track of all your pet's appointments and treatments with the MyPet Reminders app. Create personalized profiles for each pet!

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Further Reading

Find more information, facts and treatment options for stopping and preventing fleas and ticks inside and outside your home.

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  1. Blagburn BL, Dryden MW. Biology, treatment, and control of flea and tick infestations. Vet Clin N Am Small Anim Pract. 2009;39(6):1173-1200.
  2. Dryden M, Rust M. The cat flea: biology, ecology and control. Vet Parasitol. 1994;52:1-19.
  3. Data on file, Merck Animal Health
  4. Guerino F, Qureshi T, Hair J, Young D, Fiourie J. Indoxacarb Kills Developing Stages of Fleas in the Environment of Treated Cats. Presented at the WSAVA/FECAVA/BSAVA World Congress. 12-15 April 2012. Birmingham, UK.
  5. Frontline® is a registered trademark of Merial.
  6. Dryden MW, et al. Parasites & Vectors. 2013;6:126.
  7. Data on file.
  8. Activyl Protector Band [product label], Madison, NJ: Merck Animal Health.