The Best Dewormer for Cats — A Product Guide

veterinary technician palpates a cat

They’re gross. They’re disturbing. They make your fur-baby miserable. But if you own a pet, chances are you’ve had to deal with worms before. The good news is that getting rid of those nasty parasites isn’t difficult, and there are plenty of options out there to help.

It’s always recommended to speak to your vet about what dewormer he or she recommends for your unique sweetheart, they may determine she needs a prescription treatment, or over the counter may be just fine.

We’ve come up with this handy guide to help you choose the best dewormer you can for your kitty so she can get back to her normal, worm-free self!

Cat owners everywhere reported that Bayer Tapeworm Cat Dewormer got rid of their kitties’ worms quickly and easily, and that’s why it’s our top pick for the best cat dewormer. It’s safe, effective, and requires no prescription to get the job done. Purrrfect.

The Best Cat Dewormers Are:

ProductDetails
1. Bayer Tapeworm Cat Dewormer

  • Intended for adult cats over six weeks old
  • Tablet form
  • For the treatment of tapeworms
  • Contains three treatments per box
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2. Revolution Topical Solution for Cats

  • Intended for cats from 5.1 to 15 pounds
  • Topically administered
  • Solution form
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3. Pro-Sense Liquid Cat Dewormer

  • Intended for cats over six weeks old and 2.5 lbs
  • Liquid medication
  • 4 ounces per dose
  • Intended for the treatment of roundworm
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4. 8 in1 Excel Roundworm De-Wormer Liquid for Cats

  • Intended for kitties six weeks and older
  • Liquid formula
  • Intended to treat roundworms
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5. HomeoPet WRM Clear Dog, Cat, Bird & Small Animal Supplement

  • Intended for adult cats
  • Liquid form
  • Intended for treatment of roundworms, hookworms, tapeworms, whipworms
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6. Revolution Topical Solution for Puppy & Kitten

  • Intended for puppies and kittens under 5 pounds
  • Topical administration
  • Appropriate for small and toy breed dogs
  • Liquid solution
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7. Revolution Topical Solution for Cats

  • Intended for adult cats
  • Topical administration
  • Solution form Revolution, Paradyne
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8. Advantage Multi Topical Solution for Cats

  • Intended for use in adult cats 9.1-18 lbs
  • Topical administration
  • 6 applications included
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9. Interceptor Tablets

  • Contains 6 treatments
  • Intended for adult cats 12.1-25 pounds
  • For oral administration, chewable tablet form
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1. Bayer Tapeworm Cat Dewormer — Best Over The Counter Cat Dewormer

This non-prescription deworming treatment gets rid of common parasitic tapeworms such as taenia pisiformis and dipylidium caninum to give your feline the relief she deserves from nasty intestinal pests.

From the Bayer line of trusted products, this medication comes in tablet form designed to be administered whole, or crumbled and mixed into her food. As with any medication, it’s important to consult your vet for advice and keep an eye on her while she’s taking it.

There have been reports of diarrhea or salivation associated with this medication, but the incidents are few and considered non-significant. This medication is recommended for cats over six weeks old. Consult packaging for dosing information.

Specs

  • Intended for adult cats over six weeks old
  • Tablet form
  • For the treatment of tapeworms
  • Contains three treatments per box

Pros

  • Easy to crumble tablet can be mixed into her food, or administered orally whole
  • This treatment is available without a prescription, and contains 23 grams of the active ingredient praziquantel
  • Safely removes the common taenia pisiformis and dipylidium caninum tapeworms
  • Brought to you by Bayer, one of the most trusted names in drugs for humans and for kitties

Cons

  • Some clever kitties could smell the medication crumbled in their food and wouldn’t touch it.
  • Some owners reported tummy upset after their kitty took this medication. (For the cat — not the human…)
  • Some owners reported the medication didn’t work effectively in removing their kitties’ tapeworms.

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2. Revolution Topical Solution for Cats

Fleas are the hated culprit behind many parasites that can plague your baby. Flea larvae can be infected with tapeworms and if she eats one while grooming, it hangs out in her gut until it grows into a full-sized worm. Yuck. Fleas are jerks.

Luckily, Revolution Topical Solution kills adult fleas and keeps flea eggs from hatching for a month, so apply to your kitty’s skin every thirty days to keep them away for good.

This medication protects against fleas (and thus tapeworms), but also heartworms (thereby providing prevention against heartworm disease caused by dirofilaria immitis), and it’s even been known to be an effective treatment for hookworms, roundworms, and ear mites.

***NOTE*** This is a prescription medication, therefore your fur-baby needs to receive a current heartworm test, or have a current result on file with your vet to receive heartworm meds with a prescription. Visiting your vet once a year for an updated heartworm test is recommended anyway, so if you haven’t already, get to it!

There are possible side effects associated with this medication including intermittent vomiting and salivation. Please visit your vet if these symptoms are unusually frequent or persist for an extended period of time.

Also, talk to your vet if your kitty is taking any other meds to be sure it won’t cause any negative drug interactions. Consult packaging for dosing information.

***CAUTION*** As with all drugs, keep Revolution Topical Solution away from children, and it’s intended for animal use only. So if your kids have fleas, you’ll have to use something else.

Specs

  • Intended for cats from 5.1 to 15 pounds
  • Topically administered
  • Solution form

Pros

  • Can be used in small-breed dogs as well
  • Treats a host of nasties including fleas, ear mites, heartworms, hookworms, and roundworms
  • Veterinarian recommended
  • Many owners reported the product was odorless and non-irritating to their kitties’ skin

Cons

  • Not effective in treatment for adult D. immitis
  • Not effective for microfilariae clearance
  • Some owners said the product didn’t work effectively to get rid of fleas

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3. Pro-Sense Liquid Cat Dewormer

Fun Fact: Humans can contract roundworms as well, so… make sure your beloved furball is worm-free with Pro-Sense Liquid Cat Dewormer.

Nothing is worse than watching your sweet new kitten struggle with the symptoms of intestinal roundworms. These parasites can cause diarrhea, vomiting, abdominal swelling, and a host of other tummy problems.

This liquid medication can be added to her food, or given orally straight-up and is safe for cats and kittens 6 weeks or older.

***NOTE*** If your kitty is sick, wait until they’re better before worming. This medication isn’t suitable for kitties under six weeks old or under 2.5 lbs. It’s not recommended for pregnant kitties, or cats who are nursing.

Make sure your kitty over one year old has had a recent heartworm blood test with negative result before administering this medication.

Consult packaging for dosing information.

Specs

  • Intended for cats over six weeks old and 2.5 lbs
  • Liquid medication
  • 4 ounces per dose
  • Intended for the treatment of roundworm

Pros

  • Liquid formula can be easily added to her food or administered directly
  • Prevents reinfestation when used monthly as recommended
  • Protects the humans in the house too *shudder*
  • Saves your baby from the icky gastrointestinal problems associated with roundworm infection
  • Can be used safely for kittens 6 weeks or older, and over 2.5 pounds

Cons

  • Some kitties reported they hated the taste
  • Some owners said it didn’t work effectively to get rid of roundworms
  • Some owners reported it was hard to administer without spillage

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4. 8 in1 Excel Roundworm De-Wormer Liquid for Cats

Large roundworms like toxascaris leonina and toxocara canis are not only disgusting, they can wreak havoc on your kitty’s belly.

Gastrointestinal issues like vomiting, diarrhea, bloating, and a host of other problems can make her life miserable if she contracts these nasty parasites, so treat her with a quality dewormer like 8 in 1 Excel Roundworm for cats.

The vanilla-flavored liquid formula is easy to administer directly or added to her food, and it’s safe and effective for cats six weeks and older. Consult packaging for dosing information.

Specs

  • Intended for kitties six weeks and older
  • Liquid formula
  • Intended to treat roundworms

Pros

  • Dosing cup included
  • Liquid formula can be administered directly or added to her food
  • Removes large roundworms that cause stomach upset for your kitty
  • Can be administered for cats and kittens 6 weeks or older

Cons

  • Some cats knew their owners were mixing it with their food and went on a hunger strike
  • Some owners reported it wasn’t effective at getting rid of their cat’s worms
  • Only effective at treating roundworms

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5. HomeoPet WRM Clear Dog, Cat, Bird & Small Animal Supplement — Best Cat Dewormer For All Worms

This homeopathic, drug-free medication is safe for treating multiple kinds of animals, and treats multiple types of worms too! HomeoPet WRM treats roundworms, hookworms, tapeworms, and whipworms, and reduces re-infection by reducing egg production.

Administered easily orally or mixed with food or water, you can feel much better about giving it to your kitty knowing that it’s all-natural, chemical free ingredients cause no known side effects.

On top of that, this product is made in the US and registered with the FDA. Consult packaging details for dosing information.

***NOTE*** As always, consult your vet when your baby has parasites of any kind.

Specs

  • Intended for adult cats
  • Liquid form
  • Intended for treatment of roundworms, hookworms, tapeworms, whipworms

Pros

  • Clinically-proven formula is chemical-free with all-natural ingredients
  • Causes no known side effects
  • Liquid formula can be administered directly or mixed with food
  • Treats whipworms, hookworms, tapeworms, and roundworms
  • Safe for all pets, including kittens, puppies, and pregnant and nursing animals

Cons

  • Some owners said the medication was better as a preventative and didn’t help get rid of their kitties worms outright
  • Takes two weeks to begin working
  • Some owners said this formula didn’t work at all for their kitties

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6. Revolution Topical Solution for Puppy & Kitten

Revolution Topical Solution must have an updated heartworm test on file with your vet because it’s a prescription heartworm medication. As we mentioned, your feline partner needs a heartworm test performed once a year anyway, so if you haven’t done that yet, there’s no time like the present.

Applied topically to the skin every thirty days, this medication protects your kitty from biting bugs that can transmit ugly parasites like heartworms. It’s also shown to be effective for treatment and prevention of roundworms, hookworms, and ear mites. Consult the product’s packaging for dosage instructions.

***NOTE*** Keep out of reach of children! For animal use only! Also, before starting any new medication, speak to your vet about any other drugs your cat may be taking to avoid adverse drug interactions.

Specs

  • Intended for puppies and kittens under 5 pounds
  • Topical administration
  • Appropriate for small and toy breed dogs
  • Liquid solution

Pros

  • Treats fleas, heartworms, roundworms, hookworms, ear mites, and mange
  • Prevents heartworm disease transmitted by fleas caused by dirofilaria immitis
  • Liquid solution is easy to apply and is not irritable to your kitty’s skin
  • May also be used on smaller animals such as ferrets and rabbits as well
  • Works quickly to get rid of fleas

Cons

  • Some owners reported it did not keep the fleas away long term
  • Some owners reported the package states it’s appropriate for tick control, but it didn’t control ticks on their kitty
  • Side effects such as vomiting and drooling may occur, but should be intermittent and subside quickly. If side effects persist, consult your vet.

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7. Revolution Topical Solution for Cats

Revolution Topical Solution is a prescription formula, so be sure to maintain current, yearly heartworm exams for you kitty, otherwise your vet will not approve it for use.

A topical solution applied directly on this skin, this medication keeps fleas away when used as directed every 30 days. It may also be effective in treating and prevention of other nasty critters like intestinal hookworms, roundworms, and ear mites.

It works by killing adult fleas, and their eggs, helping prevent heartworm they may transmit to your furry friend. No heartworms means no heartworm disease, and it also means you can sleep better at night. Be sure to consult the dosing information on the package to give your fur baby the right dosage for her.

***NOTE*** Not for kids! Only for pets! Keep out of reach of children. Also, speak to your vet about any other medications your kitty might be taking to avoid drug interactions.

Specs

  • Intended for adult cats
  • Topical administration
  • Solution form Revolution, Paradyne

Pros

  • Fast-acting
  • Treats fleas to prevent heartworm, and heartworm disease
  • May be an effective treatment against roundworms, ear mites, and hookworms
  • Easy, topical administration means no fighting with your cat to take an oral medication

Cons

  • May cause intermittent mild symptoms of vomiting and drooling. These symptoms should subside quickly, if not, check with your veterinarian.
  • Some owners said the product wasn’t effective enough for the price
  • Some owners said the product didn’t get rid of their furry kiddo’s fleas

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8. Advantage Multi Topical Solution for Cats

Watching your kitty itching and scratching is hard. You know they’re miserable, you know there will be chunks of fur all over the place, and you know she probably has fleas, which can lead to dangerous parasitic infections.

Get rid of those fleas with Advantage Multi Topical Solution and prevent heartworm, treat and control her ear mites, and get rid of roundworm and hookworms while you’re at it. Getting rid of heartworm helps prevent dangerous heartworm disease caused by dirofilaria immitis as well.

This is a prescription medication, so your kitty needs to have current heartworm tests on file with your vet in order to use it. Heartworm testing is recommended once annually. Be sure to talk to your vet about other medications your kitty may be taking before giving her these meds.

Also, make sure your kitty doesn’t ingest this medication orally, as it can cause tremors, vomiting, decreased appetite, and/or hypersalivation if she does. Apply on areas where she can’t reach while grooming.

This medication isn’t recommended for cats who are pregnant or nursing, or for senior cats. As always, be sure to consult the packaging for appropriate dosing information.

Specs

  • Intended for use in adult cats 9.1-18 lbs
  • Topical administration
  • 6 applications included

Pros

  • Treats fleas, heartworms, roundworms, hookworms, and ear mites
  • Helps in the prevention of heartworm disease
  • Gets rid of fleas and the gross stuff they bring with them fast
  • Vet recommended

Cons

  • May cause certain side effects such as lethargy, redness, itching, scabbing and inflammation at the application site. Call your vet if your kitty experiences any of these symptoms.
  • Some multiple-cat households reported the medication worked on some cats in the house, but not others
  • Owners said the product wasn’t a good value

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9. Interceptor Tablets

Got yourself a heftier kitty suffering from awful fleas and worms? Interceptor Tablets is your choice, this prescription medication is suitable for kitties 12.1-25 lbs.

By now, you know the drill — make sure your kitties’ heartworm tests are up-to-date and on file with your vet in order to get them to give you a prescription. Once a year. Heartworm test. Do it.

Anyway, this medication not only helps prevent heartworm disease, it protects against a myriad of intestinal parasites (gross).

Interceptor comes in tablet form, and can be given directly or added to her food. You should consult your vet if your windowsill dweller is already taking other heartworm meds or other drugs to avoid adverse drug interactions.

This heartworm treatment isn’t meant for pregnant kitties or lactating mamas, and if your cat already has heartworms, talk to your vet about whether it’s a good choice for them. Don’t give it to baby kitties less than four weeks or two pounds! Be sure to consult the product packaging for dosage details.

Specs

  • Contains 6 treatments
  • Intended for adult cats 12.1-25 pounds
  • For oral administration, chewable tablet form

Pros

  • Can be used by both cats and dogs
  • Gets rid of fleas and nasty gut parasites fast
  • Veterinarian recommended
  • Oral administration reduces the chances your kitty will experience the kinds of allergic skin reactions induced by some topical treatments.

Cons

  • Precaution: Even though the recorded numbers are low, some animals experienced side effects such as trouble breathing, lethargy, drooling, and vomiting. If your cat exhibits any of this behavior after taking this medication take her to your veterinarian.
  • Some owners said their kitties wouldn’t take their medicine

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Complete Buying Guide For The Best Dewormer For Cats

What To Look For In A Quality Dewormer

When considering the best dewormer for your cat, there are a couple of rules of thumb:

Veterinarian Recommended!

Before you get shopping, consult your vet. He or she will probably want to run a test or two to find out exactly what kind of worms your kitty has, and if there are any other health issues that may interfere with the dewormer’s effectiveness or safety.

Effective Active Ingredients

A dewormer is only as good as it’s active ingredients. (Those ingredients that are medically therapeutic for the body.) Read your labels and consider what kind of treatment your kitty needs, then look for ingredients known to effectively treat what’s ailing her.

We’ll be looking a little more at the details of some active ingredients found in common dewormers and what kinds of nightmares they treat a little later in this article.

Sound Science

Take a quick google-search around and validate that your cat’s dewormer medication is coming from a manufacturer and distributor who’s done their homework.

Guides like ours will choose brand names that we trust so you can too, but if you have any questions about the reputation of a particular brand, consult your vet.

Effective Active Ingredients And What They Kill…

If you’re squeamish, some of these links may not be for you, but it’s important to know about the active ingredients commonly found in cat dewormers and what kind of creepy-crawlies they get rid of — from common gastrointestinal parasites, to ear mites and beyond, here are some of the active ingredients commonly found in deworming meds and the bugs who hate them:

Piperazine

Bayer Tapeworm Cat Dewormer (our top pick), and Pro-Sense Liquid Cat Dewormer are a couple of products listed in our guide which contain piperazine as an active ingredient. It’s an effective active ingredient in killing roundworms (ascarids).

Fenbendazole

You’ll find fenbendazole in plenty of products on our list here as well, and is effective in treating gross intestinal worms like ascarids (roundworms, remember?), whipworms, and hookworms.

Ivermectin

Ivermectin has been approved by the FDA to treat heartworm in cats and prevent heartworm disease. It can also be prescribed off-label for the treatment of ear mites and mange and scabies.

Pyrantel Pamoate

Usually used to treat stomach worm, intestinal roundworm, and hookworm in dogs, pyrantel pamoate can also be used off-label to get rid of gastrointestinal worms for cats under veterinary supervision.

A quick word on “off-label” medications. Some ingredients used in veterinary medicine, including those in some of the deworming medications we have listed here are “off-label”.

What’s The Deal With Homeopathic Deworming Treatments?

Many people swear by homeopathic treatments for deworming their cats, and there are plenty of good things about them:

  • They’re super safe for your cat. Even kittens, lactating or pregnant females, and senior cats can use them.
  • They contain no chemicals, so drug interactions are rare if any.
  • They suppress the worm’s egg production within the gut so the risk of reinfection is minimized.
  • They provide overall support of your cat’s health to recover after a worm infestation.
  • In some cases, they can pair with other wormers to help reduce gastrointestinal side effects.
  • They’re designed to get rid of tapeworms, hookworms, whipworms, and roundworms. So that’s a lot of worms.

Ok, great, let’s go all natural, right? Well, maybe not so fast. Like literally, not so fast. Most homeopathic dewormers take up to 2 weeks to work at its maximum effectiveness.

Also, your cat may still be “purging” worms for up to 4 weeks after her last dose, which makes sense because that’s about how long it takes for worm eggs to hatch.

Here’s the part that may give you the heebie-jeebies (unless you’re a veterinarian or are just somehow unaffected by parasitic worms): 

Homeopathic dewormers don’t actually kill the worms. This makes sense, because their safe, non-toxic ingredients, aren’t supposed to kill anything. Instead the treatments make the environment within your cat’s body intolerable for the worms to live in anymore so… wait for it… they come out on their own. Alive.

You can expect to find the worms vacating from your cat’s body through her stool, and to be fair, this would be happening during a worm infestation most of the time anyway, but they’ll still be alive and kickin’ (or squirmin’?) when they leave, and as we stated above, they may continue to keep on vacating (alive) up to 4 weeks after her last dose.

Another big point to keep in mind when using a homeopathic dewormer is, since the worms are still alive outside of your kitty’s body so you’ve got to keep everything super clean and sanitized until they’re all gone for good. Pretty sure you’d be doing that anyway, but just to reiterate the point.

Sometimes Nothing Will Do But A Conventional Dewormer…

If your furry companion has a compromised immune system, infection, is malnourished, or has a major infestation, a homeopathic dewormer may not be right for her.

We’ve also heard from kitty parents that if your cat has had an infestation for an extended period of time, a conventional solution is better because a homeopathic remedy may not be strong enough to get rid of an already firmly established infestation.

So if your kitty’s parasites are buying real estate and building condos, it may be best to just go with the chemicals.

Of course your vet is always the best person to ask, and sometimes they may even suggest using a homeopathic remedy in conjunction with a traditional dewormer to help.

Final Thoughts

When you know your furry beloved is beset with a parasite problem, it’s not uncommon to want to freak out just a little. Just thinking about it can make your skin crawl, but keep in mind no matter how revolted you feel, she’s the one who feels icky!

That’s why a good dewormer is what you need to get rid of them and hopefully keep them out for good. We recommend Bayer Tapeworm Cat Dewormer to get those nasty parasites out of your poor baby’s tummy, then it’ll be back to ambushing you around corners and purring comfortably in your lap in no time!

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