The Best Cat Dewormers For 2021

According to Cornell University, 45% of cats suffer from a worm infestation at any given time. So, if you suspect your cat is coping with such a problem, you should seriously look into our list of the best cat dewormers below.

A worm infestation in cats may cause mild to moderate digestive symptoms, such as bloating, diarrhea, vomiting, and flatulence. And if left untreated, it could escalate into a life-threatening condition, such as anemia. Kittens, in particular, are susceptible to roundworms and may die quickly due to malnutrition.

There are many ways for our feline companions to contract parasites. Cats who like to explore the outdoors are at higher risk than those who prefer to lounge their day away at home. Fortunately, the best cat dewormers are now available in the market so that you can save your cats from their misery.

Bayer Drontal Broad-Spectrum Dewormer For Cats & Kittens – Editor’s Pick

Bayer’s Drontal, which is our top pick for the best cat dewormers, is well worth the cost for its safe and dependable treatment of a wide variety of gastrointestinal parasites. This easy-to-swallow pill is vet-recommended; thereby, you can buy it anytime without a prescription.

Drontal uses two potent active ingredients to provide fast-acting results, and these are praziquantel and pyrantel pamoate. Each tablet contains 18.2 mg praziquantel and 72.6 mg pyrantel pamoate. A single dose is enough to give tapeworms, hookworms, and roundworms a death sentence.

Although Bayer’s Drontal may sit at the higher end of the price range, you are actually saving money in the long run. Since it has a broad-spectrum formula, you won’t need any other medication to eradicate other intestinal parasites. You will only need to give your cat one tablet for every four to eight pounds of body weight.

Also, a bottle of this dewormer offers 50 tablets. Not only will this benefit the future cat lady, but this is also a great deal for those who are running a shelter or if you find yourself treating multiple feral cats. Best of all, it is a sure-fire way to save money on vet bills.

The Bottom Line

Bayer’s Drontal Broad-Spectrum Dewormer For Cats has set the gold standard. Although you may find it expensive, it works safely and effectively to remove different kinds of intestinal parasites. Your beloved cat may loathe his medication because of its unpleasant taste, but it will not leave him suffering from adverse side effects.

Recommended by vetsMost cats are put off by the taste
The broad-spectrum formula kills several types of worms in a single doseNot suitable for 8-week-old kittens and younger
Offers minimal risk to no side effectsExpensive
For adult cats and kittens

Bayer Tapeworm Dewormer Tablets For Cats – Best For Tapeworms

Tapeworm is the most common worm infestation that affects our feline companions. These worms are easily transmitted from fleas, especially when these ectoparasites have fed on rodents or affected dogs. So, if you notice something in your cat’s poop that looks like rice morsels, it is likely that your pet has contracted a tapeworm infestation.

We recommend you get the Bayer’s Tapeworm Dewormer Tablets right away. These tablets are the best choice to end tapeworm infestations in cats and kittens. One pack offers three tablets, and each tablet contains 23 mg of praziquantel. The said chemical is the most potent ingredient against several tapeworm species, including Dipylidium caninum and Taenia taeniaeformis.

You may crush the pill and sprinkle it into your cat’s food if your pet doesn’t want to cooperate. Once ingested, the active ingredient will kill tapeworms within 24 hours. One dose is enough to root out an infestation, but kittens weighing less than four pounds may only need half a tablet.

Since cats can become reinfected with tapeworms when they accidentally ingest flea eggs, you also need to perform preventive measures against fleas in your home and backyard. Nevertheless, you will have one or two spare tablets in case an infestation reoccurs.

The Bottom Line

The Tapeworm Dewormer Tablets is another fantastic product from the trusted brand, Bayer. The active ingredient, praziquantel, works to paralyze tapeworms and end an infestation in just 24 hours. This vet-recommended dewormer is also safe for kittens from six weeks of age.

Kills all tapeworms within 24 hoursMay cause diarrhea
Safe for 6-week-old kittens
Each pack comes with 3 tablets
Vet-recommended OTC dewormer

Excel Liquid Roundworm Dewormer For Cats – Best For Kittens

Kittens usually become infected when nursing from their mother that has roundworms. Thankfully, you can use Excel Roundworm De-Wormer for six-week-old kittens. This product features a liquid formulation containing piperazine, which works best against the Toxocara cati roundworms that causes a potbellied appearance in cats.

The active ingredient causes the roundworms to detach from the intestines so that they could be discharged from your kitten’s body along with the stools. It doesn’t cause allergies, diarrhea, or whatsoever. The liquid is also among the easiest to administer since the scent and flavor appeal to cats.

This product comes in a 4-ounce bottle, and you only need to give your kitty 1/4 teaspoon for every 2.5-pound body weight. Excel recommends administering two more dosages: a fortnight apart and every 30 days to prevent reinfestation. Luckily, this is a budget-friendly dewormer that you can buy without a vet’s prescription.

The Bottom Line

This product does not treat other gastrointestinal parasites other than roundworms. Still, you can be sure of its ability to eliminate, as well as prevent a roundworm infestation in your feline companion. Since it is liquid, it is much easier to add to your pet’s food.

Treats roundworms in kittensIneffective against other roundworm species
Has a tasty flavor and enticing scent
Enough to last a kitten 2 treatments
A cost-effective solution for the treatment and prevention of common roundworms

ProSense Liquid Dewormer – Best For Roundworms

Hands down to the best cat dewormer for roundworms, the ProSense Liquid Dewormer. This treatment is suitable for cats with a worm-specific infestation.

The treatment comes in a 4-ounce bottle, which is equivalent to 24 teaspoons. Each teaspoon contains 250 mg of the active ingredient piperazine citrate. In addition to the Toxocara cati roundworm, which is a common roundworm species, it also kills Toxascaris leonine roundworms.

Administering the medicine is a breeze since the liquid formulation is highly palatable for cats, notes the manufacturer, as well as those who have tried it for their pets.

The Bottom Line

The ProSense Liquid Dewormer is a tried-and-true treatment that is easy to administer. Its active ingredient, piperazine citrate, is potent against several species of roundworms, including the Toxascaris leonine species. The effects of the drug work quickly to alleviate stomach discomfort caused by roundworms.

NaturPet D Wormer For Dogs & Cats – Best Natural Formula

The NaturPet D Wormer can be used for both our feline and canine companions, regardless of their age and size. Its liquid formulation consists of plant-based ingredients, such as wormwood, sage, black walnut, and fennel. As a natural solution, it is known to purge gastrointestinal parasites, as well as promote digestion and soothe inflammation.

Administering two doses each day over the course of a week should be enough to expel the worms from your cat. Likewise, a 100 ml bottle should suffice a week’s worth of treatment for one cat. However, there have been a few reports that the formula isn’t strong enough to eliminate tapeworms.

Know that natural dewormers are not as effective as their chemical counterparts. Even so, they are the safest choice for senior pets and kittens that do not qualify for the weight and age standard of a chemical-based treatment.

The Bottom Line

The NaturPet D Wormer is an excellent choice if you prefer a holistic approach to treat your cat’s infestation, especially if your pet is still too young to receive a chemical-based treatment. The only downside is that it comes with a very high price tag.

Chemical-freeVery expensive
Eliminates roundworms, promotes digestion, and alleviates irritation and inflammationMay not kill all larvae and eggs
Suitable for senior pets and young kittens
Helps boost your pet’s resistance to pathogens

How To Pick The Best Cat Dewormer To Ensure Proper Treatment

Lucky for you, we have researched to find the best cat dewormers in the market. But before you purchase among the list above, we advise you to do the following steps.

Identify Which Type Of Infestation Your Cat Has

Look closely at the symptoms that burden your cat. Better yet, you may want to consider taking your cat to the veterinarian so he can perform a physical exam and stool test. Unless you know what worms have infected your kitty, you won’t be able to address the problem effectively. The three most common worms that infect our feline companions are the following:

  • Tapeworms – Cats get tapeworms through contact with an infected animal. Strays, feral kitties, and the adventurous bunch are at high risk, particularly those who like to capture little prey. Fleas are also common carriers of tapeworms.
  • Roundworms – Cats get roundworms in many ways. Your kitty could get them from an infected animal or by accidentally ingesting the eggs. Kittens may also acquire them through their mother’s milk.
  • Hookworms – Cats get hookworms when the worms burrow through their skin. These tiny worms latch onto your kitty’s intestinal walls to feed off of its blood; thereby, these worms cause anemia.

The good news is that you can treat a mild infection at home using the best cat dewormers listed above as soon as your vet has made an official diagnosis.

Choose The Right Formula

The most crucial factor is to make sure the dewormer is formulated to target the infection. The best cat dewormers for cats are also determined by the potent active ingredients they use.

  • Praziquantel – This drug is effective against tapeworms. It works by inhibiting the tapeworms’ ability to digest nutrients; thereby, causing them to starve and disintegrate.
  • Pyrantel pamoate – This chemical paralyzes roundworms and hookworms, causing them to fall off from the intestinal walls and pass through along with your pet’s stool.
  • Piperazine – This drug also paralyzes roundworms, but it is ineffective against hookworms.
  • Broad-spectrum – A broad-spectrum formula is a combination of praziquantel and pyrantel pamoate. While effective, it may cause more side effects compared to worm-specific formulas.
  • Herbal blends – Some dewormers use natural ingredients to create an intestinal environment that is hostile for parasites.

Consider The Ease Of Administration

Dewormers are available in liquid or tablet forms. There are advantages and disadvantages to each. In the end, it all boils down to you. If you choose a pill, you can conceal it inside a delicious treat.


A good cat dewormer doesn’t necessarily have to come with a prescription. The best cat dewormers on our list are just as effective as vet-prescribed medications. After all, these products are formulated by vets and experts alike.

If your cat has the bad luck of suffering a gastrointestinal infection due to worms, it is wise to use the Bayer Drontal Broad-Spectrum Dewormer. Although a little pricey, its powerful active ingredients can wipe out all parasites in one dose. The best part is that it doesn’t cause serious side effects.

Some parasites are zoonotic. In other words, you can acquire the infestation from your pet. That is why you need to keep diligent about the prevention and treatment of your cat’s worm infestation all the more. Train your kitty to use its litter box properly and make sure you are feeding your pet healthy food.

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Lara Jill Regencia-Baylosis

Lara's love for animals started at the age of 5 when she took care of a little injured chick. She's now the proud fur momma of a mischievous and highly energetic Chow Chow and a supporting patron of The Philippine Animal Welfare Society.

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