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Can I Put Mosquito Repellent on My Dog?

By Andrew Rothaus, Founder · · Updated

Short answer: Do not put human mosquito repellent on your dog unless the product label specifically says it is for dogs. Human skin repellents are labeled for people, pets can lick treated skin, and pet parasite products have their own directions and risks. Use a veterinarian-recommended product labeled for your animal.

Do dogs actually need mosquito protection?

The mosquito risk that matters for a dog is heartworm, and the FDA says the products approved to prevent it all require a veterinarian's prescription, most of them given monthly as a topical liquid on the skin or an oral tablet. The FDA says heartworm disease results in severe lung disease, heart failure, other organ damage and death in pets, mainly dogs, cats and ferrets, and that the worms are spread through the bite of a mosquito. The CDC's parasite reference, DPDx, lists domestic dogs, coyotes, jackals and wolves as the most typical hosts and mosquitoes from several genera as the vectors. The FDA says it has been reported in dogs in all 50 states.

The FDA's case for prevention is what treatment costs: it says treatment can be potentially toxic to the dog's body and can cause serious complications, such as life-threatening blood clots to the dog's lungs. The mosquitoes themselves are a yard problem, covered in standing water and mosquito control. The FDA says year-round prevention is best, and that which preventive is best for your dog is a conversation with your dog's veterinarian.

The label is the boundary

A repellent label is the use direction, and it is specific about who the product is for. The EPA tells people looking for a repellent to use the label to choose the right product and to follow label directions. NPIC says common repellents such as DEET, picaridin, IR3535, and oil of lemon eucalyptus can be applied to human skin, and some can be used on clothing. That sentence does not turn a human product into a dog product.

Why dogs are a different surface

A dog is not just a smaller person with fur. The coat changes coverage. The animal can lick the product. A family member may pet the dog and get residue on their own hands. NPIC describes exposure routes as skin, eyes, breathing, or eating, and notes that residues can be eaten if hands are not washed after repellent use. With pets, grooming makes that oral route harder to ignore.

What happens if you put DEET on a dog?

The EPA's rule is not to find out: its repellent guidance says do not use any product on pets or other animals unless the label clearly states it is for animals. NPIC's DEET fact sheet says reports of pets being exposed to DEET in amounts that would make them sick are rare, and that pets that have been overexposed have shown vomiting, shaking, excitement, lack of coordination and seizures. ASPCApro says DEET can cause significant clinical signs in companion animals, and that the higher the concentration, the more risk to the pet.

NPIC says all pesticides have some level of toxicity, and that even the least toxic products can cause health problems if an animal is exposed to enough of it. The longer version is in can I use DEET on my dog. If it has already happened, NPIC says to call NPIC if you are concerned a pesticide made your pet sick, and for emergencies to contact your veterinarian or the ASPCA Animal Poison Control Center.

Is picaridin any different for dogs?

Not on the record, because the record does not mention dogs. NPIC's picaridin fact sheet says picaridin can be used on human skin or clothing to repel mosquitoes, biting flies, ticks, fleas and chiggers, and that the products are pump sprays, liquids, aerosols or wipes. The fact sheet has no pets or animals paragraph, and no agency guidance cited on this page addresses picaridin on dogs. The species comparison NPIC does give is about absorption, and it is rats, not dogs: when researchers applied picaridin to the skin of rats, 60 percent of it went through the skin, while in humans less than 6 percent of the picaridin applied to skin was absorbed. NPIC's general note is that some animals may be more sensitive than others to the effects of certain pesticides.

The agencies are silent on picaridin and dogs; we walk through that silence in picaridin and dogs. The label rule above governs, and NPIC says your veterinarian can help you compare and select the most appropriate products to control insects and ticks on your pets.

What to do instead

Use products labeled for that animal, and ask your veterinarian if you are unsure. The American Veterinary Medical Association says external parasites can irritate, injure, and transmit disease to pets, and that pet owners should work with a veterinarian on prevention and treatment. That is especially important if the pet is old, very young, pregnant, sick, medicated, or lives with cats.

Which products are actually labeled for dogs?

Two kinds, under two agencies: topical pesticides such as spot-on treatments, which the EPA registers, and heartworm preventives, which are prescription drugs under the FDA. The EPA says that since the mid-1970s it and the FDA have split oversight of products applied topically to animals to treat fleas and ticks by whether the chemical is absorbed into the bloodstream (FDA) or remains on the skin (EPA).

One dog label that lists mosquitoes: the EPA stamped label for K9 Advantix II Medium Dog, EPA Reg. No. 11556-142, describes the product as "Topical Prevention and Treatment of Fleas, Ticks, Mosquitoes, Biting Flies, and Lice" for use only on dogs and puppies 7 weeks and older weighing 11 to 20 pounds. The EPA's rules apply to all of them: use flea and tick control products only on the animal species and size or weight the label specifies, and remember that pesticides on your pets can be transferred to your children. Which one, and whether one is needed at all, is a veterinary call: the EPA says to consult your veterinarian about the best way to protect your pets from fleas and ticks and whether and when certain types of pet product applications are needed.

The cat warning

A dog product can hurt a cat, and the EPA, NPIC and the label itself all say so. NPIC says cats are more sensitive to permethrin than dogs or people because it takes their bodies a long time to break it down. NPIC says cats accidentally exposed to products with high levels of permethrin may seem anxious, be unable to walk normally, have muscle tremors and seizures, and may die from the exposure. The EPA says never apply dog products to cats, or cat products to dogs, because some pesticides are more toxic to one species than another; NPIC says dog products should never be used on cats.

Cats are in the same mosquito story: the FDA says cats can also get heartworms after being bitten by an infected mosquito, and that both indoor and outdoor cats are at risk. More on permethrin in a mixed household is in permethrin around pets. The K9 Advantix II label's active ingredients panel lists permethrin at 44 percent. The label prints a fatality box on the back panel: DO NOT USE ON CATS, MAY BE FATAL. Keep cats away from treated dogs for 24 hours. If applied to a cat or ingested by a cat, contact your veterinarian immediately.

Where Longsleeve fits

Longsleeve is for people. It is an EPA-registered 20% picaridin insect repellent lotion, EPA Reg. No. 101457-1. Use it on human skin as directed by the label. For your dog, use a dog-labeled product.

Common questions

Can I use Longsleeve on my dog?

No. Longsleeve is an EPA-registered insect repellent lotion for people. Do not use it on pets.

What should I use for a dog instead?

Use products labeled for dogs and follow the directions. Your veterinarian can help choose flea, tick, and mosquito protection for your dog.

Why is licking a problem?

If a pet licks treated skin, a product meant for skin contact can become an oral exposure. Labels are written around the intended route and species.

Can you spray a human bug spray on a dog?

No, unless that label says it is for animals. The EPA's repellent guidance is one sentence: "Do not use any product on pets or other animals unless the label clearly states it is for animals." The same guidance says to read and follow the label directions and to apply repellents only to exposed skin and clothing, and the EPA's pet guidance says to use flea and tick control products only on the animal species and size or weight specified by the label.

Do mosquito repellents labeled for dogs exist?

Products labeled for dogs exist: the EPA stamped label for K9 Advantix II Medium Dog, EPA Reg. No. 11556-142, lists mosquitoes among the pests it is for on dogs 7 weeks of age and older. NPIC says pesticides are used on pets to get rid of fleas, ticks and mosquitoes, and the EPA says to use flea and tick control products only on the animal species and size or weight specified by the product label.

Do mosquitoes bite dogs?

Yes. The FDA says heartworm is spread through the bite of a mosquito, and that when an infected mosquito bites a dog it spreads the infective larvae to the dog through the bite wound. The FDA also says people cannot get heartworms from their pets, because heartworms are only transmitted by the bite of an infected mosquito.

Sources

  1. EPA, Find the Repellent that is Right for You. https://www.epa.gov/insect-repellents/find-repellent-right-you
  2. NPIC, Insect Repellents Fact Sheet. https://npic.orst.edu/factsheets/repellents.html
  3. AVMA, External Parasites. https://www.avma.org/resources-tools/pet-owners/petcare/external-parasites
  4. CDC, Preventing Tick Bites. https://www.cdc.gov/ticks/prevention/index.html
  5. FDA, Keep the Worms Out of Your Pet's Heart! The Facts about Heartworm Disease, content current as of December 22, 2022. https://www.fda.gov/animal-veterinary/animal-health-literacy/keep-worms-out-your-pets-heart-facts-about-heartworm-disease
  6. CDC DPDx, Dirofilariasis, last reviewed June 27, 2019. https://www.cdc.gov/dpdx/dirofilariasis/index.html
  7. EPA, Using Insect Repellents Safely and Effectively, last updated September 8, 2026. https://www.epa.gov/insect-repellents/using-insect-repellents-safely-and-effectively
  8. NPIC, DEET General Fact Sheet. http://npic.orst.edu/factsheets/DEETgen.html
  9. ASPCApro, Don't DEET That Dog!. https://www.aspcapro.org/resource/dont-deet-dog
  10. NPIC, Using Pesticides on Pets, last updated September 13, 2024. https://npic.orst.edu/health/pets2.html
  11. NPIC, Pesticides and Animal Health, last updated August 6, 2025. https://npic.orst.edu/health/animhealth.html
  12. NPIC, Picaridin General Fact Sheet. http://npic.orst.edu/factsheets/PicaridinGen.html
  13. EPA, EPA's Regulation of Flea and Tick Products, last updated July 6, 2026. https://www.epa.gov/pets/epas-regulation-flea-and-tick-products
  14. EPA, Controlling Fleas and Ticks on Your Pet, last updated June 10, 2026. https://www.epa.gov/pets/controlling-fleas-and-ticks-your-pet
  15. EPA Pesticide Product Label, K9 Advantix II Medium Dog, EPA Reg. No. 11556-142, notification dated February 14, 2022 (PDF). https://www3.epa.gov/pesticides/chem_search/ppls/011556-00142-20220214.pdf
  16. EPA, Protecting Pets from Fleas and Ticks, last updated September 8, 2026. https://www.epa.gov/pets
  17. NPIC, Permethrin General Fact Sheet. http://npic.orst.edu/factsheets/PermGen.html

Last reviewed 2026-09-21 · every claim on this page is sourced above