The Best Dewormer for Cats: Reviewed for 2021

Published: September 30, 2021

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Worms in cats can lead to a variety of negative side effects. These can include diarrhea, vomiting, weight loss, a distended abdomen, lesions on the skin, and a dull coat that lacks its normal shine. If you’re concerned your cat is facing a worm infestation, your first step should be to contact your veterinarian. Once the diagnosis is confirmed, choosing the best deworming will be important.

Dewormers are available in a variety of forms, such as liquids, tablets, and natural options, at dosages for both cats and kittens. Some can be purchased without vet prescriptions, while others may require a prescription. Many dewormers feature a broad-spectrum formula to combat various types of worms like tapeworms, roundworms, hookworms, and whipworms, while others may be more specialized for one particular species.

If you need to find the best broad-spectrum or specialized dewormer for your cat, you’ve come to the right place. We’ve researched for you and have put together this list of the top choices on the market. Continue reading to find the dewormer that will help clear up your cat’s worm infestation and return them to a healthy state.

Verified Review: Our Hands-On Experience

We had a few cats who were dealing with worms recently. Before writing this article, we decided to try out a few different dewormers to see how they performed so we could share our first-hand experiences with you. Here are some additional observations we noted about each choice featured below:

  • Drontal Broad Spectrum Dewormer: We found this to be a very effective dewormer and were very satisfied with how it cleared up worms in our cats. We wish this was available in smaller bottles with just enough pills for one deworming since it is more expensive.
  • Hartz UltraGuard Rid Worm Liquid for Cats: We found that this liquid syrup was very easy to administer to our cats. We just mixed it in with food, and they took it without issue. However, you’ll want to be certain that your cats actually have round worms, and not a different type of worms since this is not a broad spectrum treatment and only targets roundworms.
  • Bayer Tapeworm Dewormer for Cats: This dewormer worked quickly to clear up the tapeworms that one of our cats was dealing with. We noticed that our cat seemed to act much more like her normal self quickly after we gave her the treatment. The first time we tried to give the treatment, we crushed it up into food, but our cats wouldn’t eat it. So, we had to try again using a pill pocket.

The Top Picks for the Best Dewormers for Cats: Ranked

Drontal Broad Spectrum Dewormer, 50 Tablets
  • Broad spectrum dewormer for tapeworms, roundworms and hookworms
  • For cats and kittens over 1 month of age and 1.5 pounds
  • Give one tablet per 4-8 lbs. body weight

This Drontal Broad Spectrum Dewormer for cats comes from Bayer, a trusted name in the medication industry. It is designed for use in both cats and kittens who are at least 1 month old and weigh at least 1.5 pounds. Drontal is a broad-spectrum dewormer that targets tapeworms, roundworms, and hookworms, three of the most common worm species that impact cats.

These tablets have two active ingredients: Praziquantel and Pyrantel Pamoate. Each bottle includes 50 pills; the exact dosage will vary for each cat based on his or her weight.

Many veterinarians choose Drontal for deworming, so you can feel confident that you’re making a good choice for your cat without a vet prescription.

Click here to check out Bayer Drontal Broad Spectrum Dewormer on

Hartz UltraGuard Rid Worm Liquid for Cats
  • A mild and effective method to remove roundworms (Toxocara Canis and Toxacaris Leonia) from cats and kittens.
  • Includes 4 ounces of dewormer syrup
  • For use on cats and kittens 8 weeks of age and older
  • Easy-to-use syrup can be dropped directly into your pet's mouth or mixed into food.
  • The first treatment should be repeated 14 days later

If your cat is suffering from Toxocara Canis or Toxacaris Leonia, more commonly known as roundworms, try the Hartz Ultra Guard Rid Worm treatment. This is a liquid dewormer that is designed to be mild, yet very effective, at getting rid of roundworms. It is suitable for use in cats and kittens who are at least 8 weeks old.

The liquid formula is designed to be easy to give to cats. Simply mix the syrup in with food for your cat or dispense it directly into their mouth.

You’ll need to give two treatments with this dewormer to effectively rid your cat of worms. The second treatment should take place two weeks after the initial treatment.

Click here to check out Hartz UltraGuard Rid Worm Liquid for Cats on

Bayer Tapeworm Dewormer (Praziquantel Tablets) for Cats, 3-Count Praziquantel Tablets for Cats and Kittens 6 Weeks and Older
  • 3-count bottle of tapeworm dewormer for cats
  • Easy effective way to remove common tapeworms in cats
  • Tablets may be crumbled and mixed with food or taken by mouth
  • Tapeworm Dewormer for Cats will remove the common tapeworms, Dipylidium caninum and Taenia taeniaeformis, from cats and kittens
  • For use in cats over 6 weeks of age

Tapeworms are another common parasite that cats deal with. We like the Bayer Tapeworm Dewormer for Cats for treating annoying tapeworms.

This bottle includes three doses to treat your cat for tapeworms. You can either place the tablets in a pill pocket or crush them to mix with your cat’s food for easing dosing.

You can use the Bayer Tapeworm Dewormer in cats or kittens who are at least 6 weeks old.

Click here to check out Bayer Tapeworm Dewormer for Cats on

How to Know if Your Cat Needs a Dewormer

Scheduling an appointment with your cat’s veterinarian is the best way to confirm they are dealing with a worm infestation. There are several symptoms that can indicate your cat has worms. These can include:

  • Diarrhea
  • Vomiting
  • Constipation
  • Dull-looking coat
  • Pale gums
  • Tarry and dark feces
  • Weight loss
  • Distended abdomen
  • Pale gums
  • Excessive licking of their anus
  • Dehydration
  • Low blood pressure
  • Weakness and lethargy

In most cases, worms are not a life-threatening condition for cats. It is estimated that up to 45% of cats will be infected with worms at some point in their life. Outdoor cats are at an even greater risk of getting worms than indoor cats.

What Type of Dewormer Should I Get

Dewormers are available in tablet and liquid form. Both options perform similarly, and the right choice for your cat will likely be the one that you will be able to administer to them. You also want to make sure that you pay attention to the correct dosage for cats or kittens and that the dewormer you choose targets the specific type of worm that your cat has.

Some of the most common types of worms cats get include roundworms, tapeworms, hookworms, and whipworms. If you are unsure what type of worms your cat has, consult with their veterinarian to make sure you’re treating the right thing.

Last update on 2021-11-17 / Affiliate links / Images from Amazon Product Advertising API

The Best Dewormer for Cats: Reviewed for 2021 FAQs (Frequently Asked Questions) 

What is the best dewormer for cats?

The best dewormer for cats can vary based on the specific type of worms your cat has. Broad-spectrum dewormers are often a popular choice since they treat multiple types of worms. We chose the Bayer Drontal Broad Spectrum Dewormer as our top pick for the best dewormer for cats.

How much is dewormer for cats?

The cost of a dewormer for cats will vary depending on whether you choose tablets, a liquid, or a natural dewormer. However, in general, most dewormers seem to cost between $10 and $25.

What dewormer do vets use for cats?

Different vets have different preferences, but many choose Bayer’s Drontal Broad Spectrum Dewormer.

Can I deworm my cat myself?

Yes, you can deworm your cat on your own. However, you should consult with their veterinarian to determine the exact type of worms and that the best dewormer to eliminate that particular species. Since many dewormers are available without vet prescriptions, you can then find and purchase your own dewormer, or go with the recommendation from your vet.

What are the symptoms of worms in cats?

Worms in cats can lead to different symptoms. These can include, but aren’t limited to, weight loss, a distended abdomen, vomiting, diarrhea, lesions on the skin, and a dull coat, tarry feces. If left untreated, worms can also cause more serious concerns such as shock, low blood pressure, dehydration, weakness, and even occasionally death.

What can I expect after deworming a cat?

After giving your cat a dewormer, it can take between two and three days for the worms to be gone. You may need to give a follow-up dose after a few weeks if the worms have not all gone or have returned from your cat licking an area that had worm eggs and caused themselves to get infected again.

Do cats feel ill after deworming?

No, most cats will begin feeling much better after being dewormed. Having worms can cause them to feel ill, so once you treat the worms, your cat’s behavior and personality may return to normal.

Do cats poop out worms after being dewormed?

Yes, after cats have been dewormed, the dead worms will come out with your cat’s poop.

What is a natural dewormer for cats?

If you are looking for a natural way to deworm your cat before trying an over-the-counter or prescription treatment, there are a few options to consider. However, it is always best to consult with your veterinarian before trying one of these treatments to ensure they are the safest approach for your cat.

A few natural ingredients that work for deworming cats include:
• Ground raw pumpkin seeds (1 tsp per day for every 10 pounds of weight mixed with food)
• Food-grade diatomaceous earth (mixed with each meal your cat eats)

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