The Best Cat Dewormers (2021 Reviews)

Skylar Dial
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Deworming your cat may just be one the most frustrating and difficult tasks you’ll ever encounter as a pet owner.


First, because it’s a bummer to think that your cat might have worms. You may not even realize it until you make the appointment for the vet and see all of the different dewormers used for all sorts of worms.

Second, because it’s important that you find the right dewormer that works with your cat’s health and that you use it the right way!

Bayer Tapeworm DewormerBest OverallBayer Tapeworm Dewormer
Hartz UltraGuard Rid Worm LiquidBudget PickHartz UltraGuard Rid Worm Liquid
Drontal Broad Spectrum DewormerUpgrade PickDrontal Broad Spectrum Dewormer

1. Bayer Tapeworm Dewormer

Our rating: 9 / 10

Bayer Tapeworm Dewormer

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2. Drontal Broad Spectrum Dewormer

Our rating: 9 / 10

Drontal Broad Spectrum Dewormer

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  • Effective against almost all species of worms in cats between two weeks and two years of age
  • Comes in a tasty, meaty tablet for improved palatability
  • Safe and easy to administer once a month
  • Effectively eliminates worms within a couple of weeks of treatment
  • Restores appetite by relieving the cat’s digestive discomfort
  • 6-in-1 formula controls worms and their eggs as well as hookworms, roundworms, tapeworms, whipworms, fleas and lice
  • The tablets are designed to dissolve quickly to ensure fast and effective treatment
  • Prevents further reinfection
  • Contains none of the ingredients that could cause drug intolerance

This twelve-month supply of Drontal is the most popular cat dewormer in the U.K. for good reason, it works. It has been used for more than three decades and is a popular choice for many vets and cat lovers worldwide.

Made in the U.K. with 100% natural ingredients and without artificial colors or flavors, it deworms many popular cat breeds including both long and short hair cats, and kittens from two weeks of age.

3. Durvet WormEze Liquid Canine & Feline Antihelmintic

Our rating: 8 / 10

Durvet WormEze Liquid Canine & Feline Antihelmintic

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  • Treats both cats and dogs
  • One of the recommended treatments (by vets) for roundworms, whipworms, hookworms, and tapeworms
  • Affordable (you get a lot of product for your money)
  • Can be used for both cats or dogs, in liquid or pill form; no more having to buy separate deworming tablets for your pets!
  • Treats against tapeworms, hookworms, whipworms, and roundworms
  • Works within 2 hours of ingestion


  • Must be given with food
  • Not for use in pregnant animals
  • Comes in a 32 oz. bottle (will last for a full deworming treatment for 2 cats, or one cat and one dog)
  • Will not treat hydatid tapeworms (althouth it does claim to go as far as hookworms, tapeworms, whipworms, and roundworms)

The Durvet Liquid WormEze is a liquid treat be administered at the recommended dose for every 5 lbs. of weight. In the case of cats, it must be given with food.

Many vets recommend this product to clients who have home-raised cats or dogs, and feed them raw foods. This product will eliminate any worms living in the intestinal tract, whose eggs end up in the stools.

4. Johnsons Easy Wormer Granules

Our rating: 7 / 10

Johnsons Easy Wormer Granules

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  • Effective against tapeworms, roundworms and hookworms
  • Available in three different sizes
  • Relatively easy to administer for all pets …including cats
  • Works quickly to eliminate worms
  • Available in a pack of 6
  • Easy to administer


  • May cause diarrhea for cats
  • It doesn’t kill all worms
  • May cause an allergic reaction in some cats

Johnsons Easy wormer granules for cats and kittens is an orally administered de-wormer, available in a pack of 6. It treats common parasitic intestinal worms such as tapeworms, roundworms and hookworms in cats within 24 hours.

It consists of two active ingredients Niclosamide and Pyrantel Pamoate. Both of these ingredients have been proven effective in the treatment of intestinal worms in cats.

The active ingredients combine to produce a single effective treatment in a granule form. The granules are easy to administer with your cat by simply mixing it with food.

5. PEAK Marketing Pet Wormer Gel

Our rating: 7 / 10

PEAK Marketing Pet Wormer Gel

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Our top choice for the best cat dewormer is this one from Peak that contains praziquantel and pyrantel pamoate which are two active ingredients that fight against worms like tapeworms, roundworms, hookworms, and whipworms.

Cat’s digestive tract is one of the most vulnerable parts of their body. That’s also where you’ll find the most illnesses and parasites. If your cat is not infected by parasites you’re one of the lucky ones, but it still doesn’t mean that you can be lax with your cat’s overall health.

Being lax could mean that they slowly build up an immunity to the worms, which is why it’s important to treat them once or twice a year to clear out the pathogens. Deworming your cat is especially important for the following reasons:

  • They make them vulnerable to infections
  • They grow in size for more time, which affects their overall health
  • They interfere with their digestion
  • They put them at risk of anaesthetic obstruction

6. Excel Liquid Roundworm De-Wormer

Our rating: 6 / 10

Excel Liquid Roundworm De-Wormer

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  • Made from eggs
  • Easy to administer orally
  • Effective for roundworms and hookworms
  • Works effectively for both kittens and cats as old as 1-year-old


  • The liquid may not be suitable for very young kittens (one month and below)
  • The product comes with an unpleasant odor, which attracts cats to the product.
  • Comes with egg pieces, which your cat might not like
  • Not suitable for all cats

As the name implies, this product is an intravenous solution that kills the following internal parasitic animals:

  • Roundworms
  • Hookworms
  • Whipworms

The product has a composition of 108% albendazole and 90% praziquantel. The albendazole is an anti-worming agent that kills the parasitic worms present in the cat’s body. The product is safe and effective for both kittens and cats as old as 4 years old.

7. Hartz UltraGuard Rid Worm Liquid

Our rating: 6 / 10

Hartz UltraGuard Rid Worm Liquid

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  • The liquid is a more effective way to deliver dewormers than other methods, such as treating the cat itself with pills.
  • The liquid can also be used to treat a cat infected with roundworms.
  • This cat dewormer works best on kittens and cats that weigh 4 pounds or more.
  • This product gives you the peace of mind of knowing that your cat is free from parasites.
  • The liquid contains praziquantel, which is the active ingredient that kills parasites in cats.
  • The bottle is easy to handle and easy to pour into the cat’s water.


  • This product does not kill tapeworms and requires a separate product to treat the cat for that type of parasite.
  • It is important to weigh the cat before giving it this product, to ensure that the amount of liquid given is correct.

The Hartz UltraGuard Dewormer is an effective way to quickly and easily get rid of worms in cats.

It is an especially excellent choice when it comes to getting rid of this type of parasite in kittens.

Not only can you get rid of tapeworms, but the Hartz UltraGuard Dewormer will eliminate hairworms and roundworms in your cats as well.

8. Wholistic Pet Organics Diatomaceous Earth Supplement

Our rating: 4 / 10

Wholistic Pet Organics Diatomaceous Earth Supplement

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  • It’s very safe for cats
  • The powder’s made from silicon dioxide, which is 100% organic
  • It’s very affordable
  • Organic, which makes it safe, as some cat dewormers can be harmful if not used correctly
  • The 100% organic diatomaceous earth is safe for dogs too
  • Fantastic reviews

You have to be careful because in a few reviews, some customers mentioned that this product doesn’t taste good. However, this will not affect your pet’s health. In fact, this is not a flavored supplement. It’s all natural, which means that it’s only made of powdered inorganic diatomaceous earth. Don’t feed your pets regular food as this can harm them.

Another thing to watch out for is the fact that in a few reviews, some users mentioned that NPH is an ingredient in this diatomaceous earth. If you’re allergic to NPH, it may not be a good choice for you.

Overall, a fantastic product that’s 100% organic cat dewormers.

9. PetArmor Sure Shot Liquid Wormer

Our rating: 4 / 10

PetArmor Sure Shot Liquid Wormer

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There are many different brands of wormers that can be used for your cats.

The two most easily accessible and most recommended wormers for cats are either Pet Armor Wormer or Pet Armor Dewormer.

Frequently Asked Questions (FAQ)

What is the best cat wormer on the market?

I personally use Droncit, which has been the most effective, most reliable option on the market.

As with all parasite treatments, there are a number of factors to consider before treating; it needs to be the right time of year and it needs to be the appropriate cat dewormer.

If you want to go about the business quickly and effectively, use this link and pick up some Droncit.

If you want some more information before buying, read on!

It should be noted that cats can, but do not always, host worms which can be harmful to humans. These worms don’t live in the cat for long and they can only cause severe or fatal damage to babies under 10 months of age.

Can I deworm my cat myself?

Yes you can, and it won't get out of hand. There are a few steps you need to take.

First, you will need to know if your cat is actually sick or not. Some cats are just born with tapeworms. You can tell if this is the case if their poop is not solid and looks more like rice or something similar.

Most deworming medication is expensive, and most of the medications us humans take require thorough research, so it is likely not cost effective to deworm your cat at home.

If you are sure your cat has a tapeworm you will need to deworm it with a medication NOT prescribed for dogs. If you do not use the right medication you can end up killing a tapeworm, which is deadly for a cat.

So you can either opt to deworm your cat, or take a chance and take care of it yourself.

How long does it take for Cat dewormer to work?

This all depends on what kind of dewormer you use. While some are effective in a matter of hours, others can take a few days as they work the parasites out of your cat. Always ask a vet or check the instructions before using a de-wormer if you are unsure.

The cat dewormer injectable are usually effective within 24 hours of being injected.

The dewormers you put in the cats food usually show effectiveness within 12 hours.

The dewormer spray usually takes effect in 48 hours at the earliest.

How often should you deworm your cat?

I would recommend you deworm your cat once a year, which is enough to rid your pet of internal parasites and help keep them healthy. Your vet will be able to provide you with the strongest dose of effective dewormers, and you may even be able to get a prescription from them which may be less expensive than store-bought dewormers.


Cats are adorable little creatures. They are docile, affectionate and their fur is soft. However, did you know they also carry a whole host of parasites that can cause a number of health problems to the host if left untreated? One of the most common is tapeworms. They are external parasites.

Our Recommendation

Bayer Tapeworm DewormerBest OverallBayer Tapeworm Dewormer
Hartz UltraGuard Rid Worm LiquidBudget PickHartz UltraGuard Rid Worm Liquid
Drontal Broad Spectrum DewormerUpgrade PickDrontal Broad Spectrum Dewormer