Best Dewormers for Cats

Updated June 2023
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Best of the Best
Drontal Broad Spectrum Dewormer
Broad Spectrum Dewormer
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Most Comprehensive
Bottom Line

A solid product that works to eliminate 3 different types of worms.


Effective at treating hookworms, roundworms, and tapeworms. Works for both kittens and full-grown cats. Easy to figure out how many tablets to administer.


Some cats may have a hard time taking these because of the size of the pills.

Best Bang for the Buck
Hartz UltraGuard Rid Worm Liquid for Cats
UltraGuard Rid Worm Liquid for Cats
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Simple Yet Solid
Bottom Line

A liquid dewormer that works well for treating roundworms and comes at an affordable price.


Liquid form that's easy to administer. Treats roundworms, which are common in cats. A popular dewormer by a top brand in pet care.


Doesn't work for a broad range of worms.

Oral-Pro Pro Pyrantel Pamoate Oral Suspension
Pro Pyrantel Pamoate Oral Suspension
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Most Versatile
Bottom Line

A trusted and versatile broad-spectrum dewormer that can be used to treat cats and kittens.


Kills a wide variety of worms. Liquid form is fairly easy to administer. When dosed properly, it can be given to adult cats and kittens. Works for dogs as well.


A few customers received bottles with close sell-by dates.

Elanco Tapeworm Dewormer for Cats
Tapeworm Dewormer for Cats
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Effective Tapeworm Treatment
Bottom Line

If you need the tapeworms gone quickly, this dewormer does the trick.


Clears up tapeworm problems in just 1 day. Works quickly and effectively, better than an injection. Does not seem to have any side effects.


This product only contains 3 pills per bottle.

Durvet Wormeze Feline Liquid Wormer
Wormeze Feline Liquid Wormer
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Easy to Administer
Bottom Line

An effective dewormer that is simple to utilize for killing roundworms.


Has a solid formula that eliminates roundworms and potentially expels other worms. Most cats don't mind the taste. Easy to dole out the right amount.


Doesn't get rid of other worms outside of roundworms.


We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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Buying guide for best dewormers for cats

Worms are a common parasite that cats are susceptible to. Fortunately, treating and preventing worms is easy with the right product.

A dewormer kills parasites while leaving your cat unharmed, allowing the dead worms to pass in your cat’s stool. Your cat should be given a dewormer that is not only safe for their age and weight but also treats the type of worm they are infected with. There are a few telltale signs of worms in older cats, but kittens need to be dewormed regularly until they reach a certain age. If you are concerned about harmful ingredients, you may want to opt for an all-natural deworming medication, which is often more expensive than other types. Dewormers can come in the form of a liquid or a tablet — you should choose the type you think will be easiest to give to your cat.

A dewormer is an integral part of maintaining your cat or kitten’s health, and a period of regular treatment is often required to eradicate worms. 

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After your cat is free of worms, you may notice improvements in health that include a more lustrous coat, more energy, and a stronger appetite.

How to know if your cat needs to be treated for worms

If you have a kitten, answering this question is easy: your pet needs to be treated for worms. This is standard treatment for all kittens below the age of three months. Kittens can be given dewormers starting at six weeks of age and should be treated every two weeks until they are three months old.

In older cats, some symptoms of worm infections include:

  • Vomiting

  • Worms near anus or in stool

  • Coughing

  • Weight loss

  • Distended stomach

  • Diarrhea

While these symptoms can be indicative of worms, some may be signs of a different illness. Either way, you should contact your veterinarian as soon as possible.

Key considerations

Medications for specific worm types

If you are able to identify which type of worm your cat is infected with, you should purchase a medication designed to treat that type of worm. Your vet may be able to help you identify what type of worm your cat has by noting your cat’s specific symptoms.

Cats may be infected with:

  • Tapeworm

  • Roundworm

  • Heartworm

  • Hookworm

  • Whipworm

  • Ringworm

Worms may come from cats eating infected rodents, drinking infected water, being bitten by fleas and ticks, or coming into contact with other cats with worms. As a result, outdoor-indoor cats are far more susceptible to worms than indoor-only cats.

Many medications target specific types of worms, but some can treat a variety of worms.

Finding a dewormer for your cat’s age and weight

Most dewormers list restrictions involving your cat’s age and weight. In most cases, the cat must be above a certain age or weight to be given the medication without any adverse effects. Never disregard warnings about age or weight restrictions.


Administration method

There are four main types of dewormers, each of which varies in its ease of administration.

  • Liquid dewormers can be given to cats directly or put over a cat’s food. Many cat owners feel this is the easiest option, though cats may detect that something is amiss with their food and avoid eating it.

  • Tablets are often flavored and may be chewable, though cats may not be willing to eat them. Crushing them over food can often trick cats into taking tablets. Some may be pills, which can be challenging to give to cats as they cannot be chewed.

  • Topical dewormers are applied at the base of the neck, so there’s no need to worry about the cat refusing to eat a tablet or take a liquid.

  • Paste dewormers work similarly to liquids but usually must be administered directly into the mouth.

Natural ingredients

Some dewormers use all-natural ingredients. If you try to avoid giving your cats any chemicals and give them all-natural food, consider dewormers that avoid chemicals or synthetic ingredients. These may be more expensive and their effectiveness can vary, so you should carefully research natural dewormers.

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Did you know?
Some dewormers may not kill worms in the larval stage, which can render them less effective.

Cat dewormer prices

Inexpensive: The least expensive dewormers start around $5 to $10 per bottle. These are typically designed to treat a variety of worms and may come in different forms. The low quantity in this price range means you may need to restock frequently.

Mid-range: Most dewormers for cats fall in the $10 to $20 range and may treat specific types of worms or a variety of worms. These can be administered in a variety of ways, but they are rarely all-natural.

Expensive: Dewormers for $20 to $40 likely either come with several doses or use all-natural ingredients. Many products in this range are the same ones recommended by veterinarians, as they are usually extremely effective.

How to prevent your cats from contracting worms

Worms can be harmful not only to your cats but also to your other pets and your children, as it is possible for worms to pass from a cat to a human through contact.

To reduce the chance of a worm infection, consider taking these precautionary steps:

  • Follow all your veterinarian’s recommendations for deworming treatments.

  • Ask your vet about preventative medications.

  • Inspect cat stools for any signs of worms regularly, especially if your cats go outdoors.

  • Keep your yard free of any animal feces.

  • Consider keeping your cats indoors if they frequently contract worms.

  • Treat your cat with a tick and flea preventative.

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Many dewormers are flavored to entice cats to take them without a struggle. Others can be discreetly put in your cat’s food.


Q. How often should adult cats be treated for worms?
Cats should be dewormed at least once per year. With outdoor cats, you should treat them with a dewormer two to three times per year, or more frequently if cats regularly eat rodents.

Q. How long is the shelf life of dewormers?
In most cases, it ranges from one to two years. The bottle or packaging should list the expiration date. After this date, the dewormer should be discarded.

Q. Do all cats require the same dosage of dewormers?
No. The dosage varies based on your cat’s weight and age, and it can be harmful or ineffective to administer the incorrect dosage.

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