9 Best Indoor Flea Killer 2023 Reviewed

It’s not only pet owners who have to deal with flea infestations. Each household is prone to flea attack, which means that even you might require the best indoor flea killer or flea control treatment. Pest Control Professional

Look out for signs of a flea infestation, and take measures to control them. Flea sprays are a good option to deal with such pests.

We’ll provide you a list of flea sprays that are the top picks for homeowners. If you’ve just discovered that your home is infested with fleas, you must take action before it’s too late. Related: Flea Treatment for Cats.

Reviews: Top 9 Best Indoor Flea Killer in 2023 

1. Wondercide Spray for Home (Indoors), Cats, Dogs

Wondercide is a popular brand as they claim to offer a safe and non-synthetic alternative to pet owners for flea control.

Wondercide Spray for Home (Indoors), Cats, Dogs View on Amazon

The spray is made up of natural ingredients, such as lemongrass oil, rosemary oil, and cedar oil, along with sodium lauryl sulfate as an active ingredient. 

It’s able to kill fleas by immediately stopping their hearts, and also tends to have a strong repellent action. It is safe and can be sprayed on your pet’s fur and on your clothes as well.

The mixture of natural ingredients is effective for repelling fleas and also eases the itchiness on your pet’s skin.

Although a few complaints have come up regarding the strong odor of the Cedar line, the Lemongrass and Rosemary line have been widely embraced by users. A number of customers, however, have claimed that its effectiveness has decreased after a change in the original formula.


  • It’s non-staining.
  • Offers a non-synthetic alternative for removing fleas.
  • The scents of Lemongrass and Rosemary have very been well received.


  • Compared to products of the same category, it’s quite expensive.
  • You need to reapply the spray after a wash as it’s not waterproof.
  • The spray isn’t too powerful.

Related: How to Get Rid Of Fleas in Carpet

2. Virbac Knockout Spray – Indoor Flea Treatment

The Virbac Knockout Spray is solely designed to be sprayed in the areas where your pet resides. You shouldn’t use it to spray it directly on your pet’s fur.

Virbac Knockout Spray - Indoor Flea Treatement View on Amazon

The active ingredients in this spray are Pyriproxyfen, Pyrethrums, and Permethrin. It’s powerful enough to help rid you of any adult fleas, and also stops the pupae from developing.

However, it has no effect on their eggs, so you’d have to use an insect growth regulator to kill those.

Once you’re done spraying the room, we advise you and your pets to step out of that space till the product dries up. Staying inside the room can be harmful as well as an unpleasant experience for you or your pets.


  • It’s non-staining and quite easy to use.
  • It has a long-range of around 2100 square feet.
  • Its effect can last for almost seven months.


  • Requires at least two hours of drying out.
  • Leaves behind a nasty odor.

3. Dr. Green Pet Flea Spray

Dr. Green Pet Flea Spray, just like the Wondercide Spray, uses all-natural ingredients and essential oils like cedar, clove, peppermint, and cinnamon oils.

Dr. Green Pet Flea Spray View on Amazon

It can kill and repel fleas once you spray the formula onto your pets.

It can be used on both cats and dogs, and the scent of the spray keeps the flea away. It offers a good substitute for the more powerful chemical products that you may be using.

Although this natural product might seem to be a good option against fleas, it doesn’t always prove to be quite effective. To get the desired result, we advise you to shake it well before use; otherwise, it may be a hit or a miss.


  • It’s an all-natural flea spray.
  • Won’t leave you with an unpleasant odor.
  • Smoothes up your pet’s skin and lessens itching.


  • Requires reapplication after a short time period.
  • Won’t show desired results unless used with other products.
  • Can be difficult to use as the aerosol sometimes won’t spray smoothly.


Related: Flea Bites vs. Bed Bug Bites- Differentiate?

4. Adams Plus Flea and Tick Spray

Adams Plus is certainly the most effective flea spray out there. It mixes etofenprox, an egg killer with S-Methoprene, which is a powerful insect growth regulator.

Adams Plus Flea and Tick Spray View on Amazon

Even with such strong ingredients, it’s safe to be applied to your pets and the surrounding areas. You’ll notice quick results with this spray as it can eliminate fleas from every stage of their life cycle.

You can use it according to your requirement, for killing fleas or even as a repellent. This product is extremely powerful and is currently the best flea spray available in the market that kills fleas regardless of what stage of life they’re in.

But some customers have complained about its overpowering odor, which can also prove to be strong if your pet is sensitive to smells.


  • Can be used on both cats and dogs to kill fleas.
  • Provides immediate relief from itching and is effective for fleas from all stages of the life cycle.
  • It’s also useful to repel other insects that bite.


  • Can leave your pet with an odd odor that might stay on for about two days.
  • Etofenprox is a pyrethroid that can prove to be toxic for cats.
  • Can make your pet’s fur oily and cause discoloration.

Read Also: What Do Baby Fleas Look Like?

5. Petcor Flea Spray

The last flea spray that has made it to our list is Petcor Flea Spray that you need to apply onto your pet directly.

Petcor Flea Spray View on Amazon

This spray makes use of natural pyrethrins that helps in killing fleas that come into contact with it. It also contains an insect growth regulator that results in an upset in the reproductive cycle of the flea infestation.

As it’s a professional-grade flea spray it’s intended to be used on the pets directly and not on the surrounding areas. Before you use the spray, ensure that you’ve carefully read the label.

It’s better not to be used for cats, but if it’s absolutely necessary, you can spray it on a piece of cloth and then apply it rather than spraying directly.


  • Highly recommended by a lot of pest control professionals.
  • Allows disruption of further flea reproduction as it contains insect growth regulators.


  • Come with a strong pungent smell.
  • The formulation can prove to be sensitive for cats.
  • It needs to be applied regularly every week.

Read Also: How Do Flea Collars Work?

6. Vet’s Best Flea and Tick Home Spray

Vet’s Best Flea and Tick Home Spray is made using all-natural products. This spray makes the list because you can not only use it indoors but on your dogs as well.

Vet’s Best Flea and Tick Home Spray View on Amazon

It helps to kill and prevent fleas at each stage of life, mosquitoes and ticks.

The ingredients used in this spray consist of certified natural essential oils. It leaves a pleasant fragrance in your home when you spray and is safe to be applied to your pets. It comes with a non-staining formula that can be used both indoors and outdoors.

The product is available in different sizes, providing affordable purchasing options. The spray bottle also comes with a refilling option.


  • Doesn’t use toxic chemical.
  • Effectively eliminates the entire lifecycle of fleas and other pests like ticks and mosquitoes.
  • Applicable on different home surfaces.
  • Has a non-staining formula.
  • Extremely affordable as it offers bulk options.


  • Better suited when used as a preventive measure.


Related: How Long Can Fleas Live Without a Host?

7. Vet Kem Siphotrol Plus II Premise Pest Control Spray

The Vet Kem Siphotrol Plus II Premise Pest Control Spray consists of a strong ingredient, PRECOR Insect Growth Regulator.

Vet Kem Siphotrol Plus II Premise Pest Control Spray View on Amazon

The active ingredients used are Permethrin, N-Octyl Bicycloheptene Bicarboximide, Piperonyl Butoxide, Phenothrin, and (S)-Methoprene. This formula makes this flea killer highly effective with a 100% kill rate against adult fleas. It can wipe out the pests within just 10 minutes.

You can use it at your home to eliminate fleas. It works well for carpets and hard surfaces. Make sure you wear gloves and filter masks when using this spray.

As the spray contains toxic chemicals, it isn’t suitable for direct use on your pets.


  • Helps achieve instant results.
  • Provides coverage of around 2000 square feet.
  • Can infiltrate carpet.
  • Stops fleas from recurring for up to seven months.
  • Doesn’t have an overpowering odor and doesn’t leave behind a lingering smell.
  • Doesn’t require you to vacate the building for long hours.


  • Cannot be used on your pets due to toxic chemicals.

Read Also: Does Coconut Oil Kill Fleas?


We’ve updated you on the best flea control sprays available in the market. By using these sprays as directed, you can easily get rid of fleas from your pets and the insides of your house.

We would advise that once you’ve succeeded in getting rid of the flea infestations from your home and pets, make sure that you take preventive measures afterward to keep them from recurring.

In case the infestation is too extensive for you to handle, you may need to call in a professional pest control service. You can choose any one of these according to your preference. But remember that only spraying isn’t enough.


  1. Flea Control and Prevention | Entomology

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