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Does Peroxide Kill Fleas: Guide to Remove These Pests

If you are a happy cat or dog owner, you are definitely familiar with that type of problem which seems to be so daily. Fleas are one of the most difficult pests that are hard to remove. Fleas cause discomfort to animals: there is severe itching, skin irritation, and fur loss. Also, parasites such as tapeworms can be transmitted through fleas.

Tapeworms may get inside fleas and can infect a pet. Fleas can result in major diseases over time. Many pet owners wonder: Does hydrogen peroxide kill fleas? Сommercial-grade 3% hydrogen peroxide is a disinfectant that comes to mind first.

How to Use Hydrogen Peroxide Against Fleas on Pet

  1. Mix 3 tablespoons of shampoo, one cup of peroxide, and water. Spray your pet every alternate day. Bathe your pet after spraying.
  2. For a serious infestation, rinse the pet’s fur with water. Then, pour one bottle of peroxide on the body, let it work for one minute, and wash the pet.
  3. Will hydrogen peroxide kill fleas in your house? Yes, all you need to do is spray the furniture with a fifty-fifty solution of water and peroxide.

Guide on How to Kill Fleas with Hydrogen Peroxide

Woman applying flea treatment to cat

In this article, we will tell about all the main nuances of removing fleas by using hydrogen peroxide. We will finally answer the main questions that disturb pet owners.

Can Peroxide Kill Fleas?

Peroxide may kill fleas by submerging them or damaging the outer shell, which protects the flea from dehydration. Using peroxide kills flea-borne viruses and bacteria. Killing their eggs on textile cuts the flea population. This is why it is important to remove fleas not only from the skin but also from items throughout the house.

Is It Safe to Use Hydrogen Peroxide?

Surely you are interested: Is it safe to use hydrogen peroxide on dogs and cats? Peroxide can kill fleas, but it can irritate pet skin and may damage a pet’s fur. An important thing to know is you shouldn’t pour it on any spot which is dry because that will cause irritation. It is also important not to pour peroxide on deep wounds, as this will slow down their healing.

How Do I Use Hydrogen Peroxide to Kill Fleas?

For insignificant infestations, fill up a spray bottle with water, one cup of peroxide, and three tablespoons of shampoo for pets. Spray your pet every alternate day to remove any fleas and kill the eggs. Then wash your pet.

If the infestation has spread all over the body, put the dog in a bath. Rinse him with water. Then, pour one bottle of 3% hydrogen peroxide on pet. Let the combination of water and peroxide work for a minute before rinsing your dog.

Woman Getting Golden Retriever Fur

You also have to remove flea eggs from your house. Spray a fifty-fifty solution of water and peroxide to prevent infestation. Mix one part peroxide with one part laundry detergent in a plastic dish. Use this concoction to wash your clothes.

Does Peroxide Kill Fleas on Cats?

This method is suitable for both dogs, and cats. The most common animal for fleas to latch on is a dog. The reason is that, unlike cats, dogs like to play in the yard regularly and may get fleas from the grass or dirt.

Precautions for Using Hydrogen Peroxide:

  • Use 3% hydrogen peroxide.
  • Watch out if your pet doesn’t drink peroxide.
  • Avoid using peroxide on your pet’s wounds.
  • Don’t apply to dry skin.
  • Avoid contact with eyes.
  • Wash off the solution well after the procedures.
  • Always follow instructions, and don’t experiment.

FAQ on Hydrogen Peroxide Fleas Removal

Girl pouring liquid on a cat

Will Peroxide Kill Flea Eggs?

Yes, hydrogen peroxide destroys living cells, including cells of flea eggs (outer shell) by dehydration. You must follow all precautions while using 3% hydrogen peroxide.

What Kills Fleas Instantly?

The most effective way to stop the infestation is by disrupting their life cycles and bringing their populations to an inactive state. Many chemical-based products can harm your pets’ health. Using peroxide for killing fleas is a safer alternative.

Can I Bathe My Dog with Hydrogen Peroxide?

Yes, you can bathe your dog, but don’t leave peroxide on the skin for a long time, rinse your dog well with water. Peroxide is safe for dogs when used right.

Is Hydrogen Peroxide Safe for Cats Skin?

3% hydrogen peroxide is not dangerous to cats at low concentrations. Just as with dogs, rinse the peroxide well from the cat’s body, don’t leave it for a long time, and don’t treat deep wounds. Watch out if your cat doesn’t drink hydrogen peroxide or lick peroxide-treated fur.

What About Fleas? Let’s Sum It Up

You can get fleas off your pets and household items by using 3% hydrogen peroxide. It is a proven and safe method. A bottle of peroxide can be found in every supermarket and pharmacy. Many people have peroxide in their first aid kit. But remember to take precautions. Consult with your veterinarian. Prolonged exposure to peroxide on a pet’s skin may cause mild irritation.

What is your experience with fleas? What methods do you use?

Also Read:


  • Tapeworms in Dogs: Symptoms, Treatment, and Prevention (By AKC Staff – American Kennel Club)
  • Fleaborne Diseases of the United States (U.S. Department of Health & Human Services)


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Nicholas Martin

Nicholas Martin

I am Nicholas Martin, and I am an entomologist. I combine the insect survey work with the consultation for private pest control agencies. My narrow specializations are both urban pests and agricultural pests. I studied their control over the previous 25 years. More about Nick

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