Cat Dewormers Review

Best Cat Dewormers That Really Work

Deworming a cat is one of the most common and necessary “procedures” a cat owner must perform on their beloved kitty. Unfortunately, as much as 45% of cats at any given time have parasites, according to the veterinarians from Cornell University.  It is a health issue that can cause mild, yet still unpleasant symptoms in cats such as vomiting, diarrhea, and unhealthy skin and coat, amongst several others.

It can even lead to much more serious gastrointestinal disturbances, anemia, slowed or restricted growth, and malnutrition. Cats can also pass the parasites along to other animals as well as humans. Luckily, treating worms in your cat is not very difficult and most over the counter medicines will get the job done. Read this article to know what is the best cat dewormer you can buy in 2020.

Top 8 Cat Dewormers😺

Seeing that there is a lot to consider when choosing the right dewormer for your cat, we have put together a list of the best over the counter cat dewormer medicines on the market in 2020. We have looked at the variety of the available treatments and provided you with information on which to choose for your cat, how to administer it properly, and how often. 

Bayer’s Drontal Broad Spectrum Dewormer

Bayer’s Drontal Broad Spectrum Dewormer seems to be the unanimous choice by most cat owners and veterinarians. It is not a cheap option, but it is the best available over the counter cat dewormer currently on the market. This broad-spectrum cat dewormer eradicates multiple types of parasites at once.

Therefore, even though it might be expensive, if you are treating many types of worms and for several cats (a rescue group or a shelter for example), this will be worth your money. This product wins our “best cat dewormer over the counter” award.

What we liked 😺

What we didn’t like 😿

  • Safe, reliable, and proven
  • Quick results
  • Veterinarian recommended 
  • Treats several types of worms at once
  • Very expensive
  • Not a suitable kitten dewormer for kittens under 2 lbs or under 2 months old
  • Some cats might dislike the taste

Bayer’s Tapeworm Dewormer Tablets for Cats

Second on our list is another very popular Bayer’s product. The difference between this dewormer and the one we mention above is the particular focus on tapeworms. These tablets are specifically designed to narrow down and destroy this particular type of worm and it does so effectively with a single, easy-to-administer dose.

Tapeworm is actually fairly easy to spot in your cat’s stool as it looks like small grains of white rice and your cat is likely to be licking and biting the area under his tail, if infected.

Tapeworms infect cats through the ingesting of an infected adult flea. Even though these Bayer’s tables tackle the issue quickly and effectively, it is important to not only eliminate the worms themselves, but also get rid of the fleas from your home, yard, or other areas where cats can get re-infected.

The active ingredient in this medicine is 23 milligrams of praziquantel and it fights off the most common species of tapeworms by paralyzing them, while the dipylidium caninum and taenia taeniaeformis help to eliminate them by a single dose. You can administer the one table whole or crushed and mixed with food.

What we liked 😺

What we didn’t like 😿

  • Eliminates tapeworms within 24 hours
  • Contains powerfully active ingredients
  • Does not require a prescription and is easy to administer
  • Long trusted brand name
  • Great specific tapeworm dewormer for cats
  • Some cats may experience diarrhea after taking it
  • Not a suitable kitten dewormer for kittens smaller than 6 weeks of old

Wormer by NaturePet: All-natural cat dewormer

Our top pick for the best all-natural dewormer for cats is NaturPet D Wormer for Cats and Dogs. This product makes our list at number 3 for simple reasons that it is effective and is made from all-natural, plant-based ingredients. If you aren’t too keen on giving medicine made with chemical ingredients to your favorite feline friend, you will want to consider this product.

The beauty of it lies in the fact that not only it eliminates parasites from your cat’s intestinal tract, but also promotes healthy digestion and soothes the digestive system in general.

Natural dewormers may not work as quickly as chemical dewormers, but they may be used for very small and young kittens that are not old enough or weigh enough to take a drug-based dewormer.

NaturPet D Wormer is suitable for both cats and dogs alike. It is made with plant-based ingredients such as wormwood to expel parasites, fennel so soothes the lining of the intestines, black walnut to repel worms, and sage to cleanse the digestive system.

The big difference is the speed with which this dewormer works compared to the two previous reviewed Bayern products. Being all-natural, it does take much longer for the product to work, and you’ll have to continuously administer it to your cat for about 1 week, as opposed to only once as is the case with the previously mentioned products, but it does so in a safe and gentle manner. This is our pick as the best natural cat dewormer.

What we liked 😺

What we didn’t like 😿

  • Contains all-natural ingredients
  • Versatile and works on a variety of intestinal parasites
  • Easy-to-administer liquid with clear dosing instructions
  • Works for both cats and dogs
  • Takes longer to work (twice a day for 1 week)
  • More expensive than some other less natural options
  • Instead of killing the worms it flushes them out

Pet Wellbeing GI CleanUp Gold for Cat Worms

This is another great natural option if you prefer using natural products on your cats. The difference between this product and NaturPet D-Wormer is the absence of black wormwood and black walnut as some pets might find them slightly harsh on their stomachs.


What we liked 😺

What we didn’t like 😿

  • Maintains a healthy gut environment that isn’t suitable for parasites
  • Safe & gentle
  • Suitable to use cyclically, on an ongoing basis
  • Being a natural remedy, this isn’t meant for acute situation


ProSense’s Dewormer Solutions

ProSense’s Dewormer Solutions is a very effective feline dewormer and is suitable against roundworms in particular, the most common intestinal parasite seen in cats, affecting about 25% of all felines.

ProSense Liquid Dewormer for Roundworms is safe for use in cats and kittens over 6 weeks of age and weighing at least 2.5 pounds. This remedy works on two types of roundworms, including Taxocara Cati and Toxascaris Leonine.

This liquid product is easy to administer and you can give it directly or mix into cat’s food. Every teaspoon contains roughly 250ml of the active ingredient piperazine citrate, the most tried and proven treatment for these particular types of cat worms, making a great choice for a roundworm medicine for cats.

What we liked 😺

What we didn’t like 😿

  • Highly effective against two very common types of roundworms
  • Comes in an easy-to-administer liquid
  • Budget friendly and cost-effective option
  • Like most products on this list, this one is also not suitable for cats and kittens younger than 6 weeks old
  • Too much dosage can cause vomiting

Durvet WormEze Liquid Canine & Feline Antihelmintic

This dewormer is one of the least expensive solutions on the market. Therefore,  if your kitty has roundworm issues and you don’t want to spend your entire savings on the solution, you should definitely give this product a try. It comes in the form of a liquid and tastes good enough for most animals, so it is very easy to administer. Feel free to try adding it to your cat’s food or water.


What we liked 😺

What we didn’t like 😿

  • PRICE!
  • Safe kitten dewormer for kittens 6 weeks and older
  • Tastes great
  • Easy to administer
  • Works for only 1 type of worm


PetArmor Sure Shot Liquid Wormer for Cats

Our list would not be complete without the Excel Roundworm De-Wormer for Cats as it is the most budget-friendly option out there which seems to be working well for most cats and is an excellent dewormer for kittens 6 weeks and older. 

This particular formula also focuses on roundworms, as mentioned earlier, the most common type of worm in cats. This remedy works by effectively detaching them from the lining of the intestine and expels them from the cat’s body.

The product is safe for kittens, however is not recommended for pregnant or nursing cats.

What we liked 😺

What we didn’t like 😿

  • Easy-to-administer liquid
  • May be used as a kitten dewormer in young kittens older than 6 weeks
  • May not be as effective as others mentioned above
  • Not for nursing or pregnant female cats

HARTZ UltraGuard Rid Worm Liquid for Cats

Hartz UltraGuard Rid Worm Liquid is also a very solid choice for removal of roundworms in cats as well as for deworming roundworms in kittens (8 weeks and up). It is a mild yet effective remedy that zeros in on Toxocara Canis and Toxacaris Leonia roundworms specifically. It comes as a 4-ounce syrup that can be dropped into a cat’s mouth directly or mixed with their food. After the first series of treatments of Hartz UltraGuard Rid Worm Liquid you’ll have to repeat another treatment in 2 weeks after the initial one.

HomeoPet WRM Clear is brought to you by a family-owned company that is in the business of producing chemical-free, natural solutions for pets, and will always have a spot on our list.

The biggest selling feature of this product, besides being all-natural, is the fact that it works on 4 different types of worms, including hookworm, roundworm, whipworm, and tapeworm. Not only it works to eliminate the infestation, but it also helps prevent re-infestation by suppressing egg production. It is easy to administer, by mixing with either water or food, causes zero known side effects, and is a chemical-free, homeopathic solution.

What we liked 😺

What we didn’t like 😿

  • Homeopathic drops, all-natural, chemical-free
  • Works on 4 types of different worms (hookworms, roundworms, tapeworms, and whipworms).
  • Helps to prevent re-infection
  • Does not have any known side-effects
  • Non-sedating and safe for all pets including pregnant, and nursing animals, making it an excellent choice as a dewormer for kittens.
  • As most others, sometimes might not work for a certain cat (like with most other products, there is a chance it won’t do the job for your particular kitty)

Frequently Asked Questions Choosing the Best Cat Dewormer

Q: Where can I buy cat dewormer?

A: You can purchase them over the counter at most major retailers such as PetSmart, PetCo, Wallmart or online on and


Q: Can you buy cat dewormer over the counter?

A:  Yes, you do not need a prescription to buy cat dewormers.


Q: What is the best over the counter cat dewormer?

A: We have provided the top 10 best cat dewormers above. They are all excellent choices! 


Q: How long does cat dewormer take to work?

A: It depends on the type of dewormer. Some produce results in 24 hours and some can take up to one week or slightly more.


Q: How often can I give my cat dewormer?

A: It all depends on the type and brand. Some are required to be given once, and others could be administered daily for up to a week. 


Q: How to tell if a dewormer is working for a cat?

A: Your cat may experience several side effects that can be associated with the dewormer acting in the cat’s system. These cat dewormer side effects may include vomiting, increased salivation, diarrhea, and loss of appetite.


Q: How do cats get tapeworms?

A:  Cats can get them by eating birds or fleas infected with tapeworm eggs.

Q: How to treat tapeworms in cats at home?

A: There are numerous over the counter treatments for tapeworms. Follow the procedures on the label of the medicine you end up buying.


Q: What do roundworms look like in cats?

A: Roundworms look like 3”-5” long pieces of wet spaghetti.


Q: How to get rid of roundworms in cats?

A: There are numerous over the counter treatments for roundworms. Follow the procedures on the label of the roundworm treatment for cats you end up buying.


Q: How do cats get infected with worms?

A: Worms are parasites that can infect a kitten through the mother’s milk and an adult cat can get infected through flea eggs or contact with other infected animals. Mosquito, flea, tick bites or coming into contact with the infected feces or vomit can also lead to infection.


Q: What are different types of cat worms?

A: The following intestinal parasites are some of the most common types of cat worms:

  • Roundworms: The most common, 3-5” long in adulthood, resemble a piece of wet spaghetti. Transmitted through a nursing process, by eating an already infected animal, or contact with the infected feces. 
  • Tapeworms: Long and flat ⅛” segmented, grow to 8”in length. Cats can get them by eating birds or fleas infected with tapeworm eggs.
  • Hookworms: Smallest of any cat worm, grow to maximum 1” in length. Very dangerous as they can cause anemia, live in the small intestine, and feed on the blood. Hookworms are passed in the feces and can transmit to other animals and people. 
  • Whipworms: Roughly ¼” long and dwell in the cecum and colon. These worms can cause severe damage to these organs and are considered as one of the most dangerous cat worms out there. 
  • Heartworms: They live in the heart and pulmonary arteries. Transmitted by infected mosquitoes, which migrate throughout the body for about 6 months before finally coming to rest in the circulatory system. Heartworms are transmitted only from an infected mosquito’s bite, so animal to animal, or animal to human transmission is not possible. It could be fatal if not treated. 
  • Coccidia – Single-celled organism that causes diarrhea in kittens, and can be treated with the prescription drug Ponazuril. 
  • Giardia is another protozoan infection, resulting in soft, frothy, greasy diarrhea, which can be treated with Panacur.


Q: How do I know whether my cat has worms?

A: If you suspect that your cat might be infected, or if it is just a precautionary measure based at certain age intervals (will be discussed below), it is very important to pay your vet a visit.

If your feline friend does in fact have parasites, a veterinarian can verify it by performing a fecal exam and establish which strand of worms it is. Once you know, you can use our guide to decide which product to use during treatment.

As for yourself, you can observe your kitty see if he has any visible symptoms, as sometimes they won’t have any. Visible symptoms can include excessive vomiting, diarrhea, weight loss, and sensitive anus. Further, there is a chance of growth retardation and swollen abdomen are also very visible and alarming signs. Depending on the situation, you might notice worm eggs in the feces, that can look like single grains of white rice or wet spaghetti.


Q: Do all kittens have worms?

A: Many kittens get them when they are born either through nursing if the mom is infected, or through the litter box that they share with other kittens. There is a good chance that your new kitten might have them so seeing a vet when you adopt a tiny ball of joy is necessary.

Q: At what age should I deworm my cat and when to deworm a kitten?

A: Considering that almost all kittens get infected with roundworms, it is absolutely crucial to deworm your cats at a very young age. We recommend starting the process as young as 4, 6, and 8 weeks old and then repeating it at 4 and 6 months. If your feline is not a kitten anymore, it is still possible for them to get worms so treating them against tapeworm and roundworm is also necessary. Every half a year is a good practice, or when needed, based on your vet’s recommendations. We also recommend deworming all newly acquired and rehomed cats, especially if the medical history is unknown or questionable.

Basic Guide: 

• at 4 – 6 – 8 weeks
• then at 4 and 6 months

Adult cat:
• at 1 year – 1.5 years – 2 years- etc.

Final Verdict on the Best Cat Dewormer

For a cat to be infected with worms is not an uncommon issue and isn’t life-threatening, unless it is left unchecked. Therefore, all kittens get treated for worms in the early stages of life and regularly throughout their lifetime. There are many different types of worms and many different ways to test for them, with some being visible to the naked eye, some affecting your cat’s behaviour, and others being only identifiable by tests from your veterinarian.

Each type requires a unique solution, which is why there are many options on the market, and they have their own unique ways of dealing with the issue. As we always say, speaking to a veterinarian is always the best first step, but we tried to give you a list of what we think are the best products on the market in 2020, to make the research easier for you.

As always, if you have any questions, concerns, and comments, please let us know as we always welcome them.