How Long Does Dewormer Take to Work on Cats

icon November 7, 2023
by:puaintapets

Cats, like all living creatures, are susceptible to various health issues, and one common problem that often plagues them is internal parasites, including worms. Worm infestations in cats can lead to a variety of health issues, and it's crucial to address them promptly to ensure the well-being of your feline friend. Deworming is the primary method to get rid of these unwelcome visitors, but how long does it take for dewormer to work on cats? In this comprehensive guide, we will explore the timeline, methods, and various aspects of deworming cats.
How Long Does Dewormer Take To Work On Cats

How Long Does Dewormer Take To Work On Cats?

The time it takes for a dewormer to work on cats can vary depending on the type of dewormer used and the severity of the infestation. In general, most dewormers start to kill and expel worms within a few hours to a few days of administration. Some cats may show immediate improvement, while others may take a bit longer to exhibit visible results. It's important to follow the dosing instructions provided by your veterinarian and be patient, as it may take a week or more to completely rid your cat of worms.

How Do I Know If My Cat Dewormer Is Working?

The effectiveness of a dewormer in cats can be assessed in several ways:

  • 1. Reduction in Symptoms: If your cat is displaying symptoms of a worm infestation, a successful deworming treatment should lead to a reduction or complete resolution of these symptoms. For example, if your cat had diarrhea and vomiting before deworming, these issues should improve over time.
  • 2. Visible Worms: In some cases, you may notice dead worms in your cat's feces within a few days of deworming. This is a positive sign that the treatment is working, as it indicates the expulsion of the parasites.
  • 3. Fecal Examination: Your veterinarian may recommend a follow-up fecal examination to confirm the absence of worms. This is especially important if your cat had a severe infestation or if there were specific concerns about the effectiveness of the dewormer.
  • 4. Improved General Health: Over time, you should observe an improvement in your cat's overall health and well-being. Their coat should become shinier, they should have more energy, and their appetite should return to normal.
  • 5. Preventative Measures: Continue to follow your veterinarian's recommendations for preventative care. This may include regular deworming, flea prevention, and maintaining good hygiene to minimize the risk of future infestations.

How to Deworm a Cat?

Deworming a cat involves the administration of medication designed to eliminate internal parasites. Before you can determine how long it takes for the dewormer to work, it's essential to understand the process of deworming itself.

1. Consult a Veterinarian: Before starting any deworming treatment, it's crucial to consult with your veterinarian. They can help determine the type of worms your cat has and recommend the most suitable deworming medication.

2. Choose the Right Dewormer: There are various types of dewormers available, each targeting specific types of worms. The most common types of worms in cats include roundworms, tapeworms, hookworms, and whipworms. 

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3. Follow the Dosage Instructions: It's essential to administer the dewormer as directed by your veterinarian. Dosages can vary depending on the type of dewormer and your cat's weight. Never try to estimate the dosage yourself.

4. Administer the Medication: Dewormers can come in different forms, such as tablets, liquid, or topical applications. Administer the medication according to the prescribed method. Some cats may be more cooperative than others, so you may need to get creative in how you administer the medication.

5. Monitor Your Cat: Keep a close eye on your cat after giving them the dewormer. Some cats may experience mild side effects like vomiting or diarrhea, but these should resolve on their own. If severe side effects occur, contact your veterinarian immediately.

How to Get Rid of Worms in Cats?

To effectively get rid of worms in cats, follow these steps:

1. Regular Veterinary Check-ups: Schedule regular check-ups with your veterinarian to monitor your cat's health and detect worm infestations early.

2. Practice Good Hygiene: Keep your cat's living environment clean and practice good hygiene to prevent worm eggs from spreading. Regularly clean the litter box and dispose of feces properly.

3. Prevent Fleas: Fleas can be intermediate hosts for some types of worms. Use flea prevention products recommended by your vet.

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4. Isolate Infected Cats: If you have multiple cats, isolate any infected individuals to prevent the spread of worms to healthy cats.

5. Administer Preventative Medication: Depending on your cat's risk factors, your veterinarian may recommend regular preventative medication. These can be given on a monthly or quarterly basis to reduce the risk of re-infestation.

6. Monitor Your Cat's Health: Keep an eye on your cat's health, and if you notice any symptoms of worm infestations, consult your veterinarian for a diagnosis and treatment plan.

How Often Should I Deworm My Cat?

The frequency of deworming your cat depends on several factors, including their age, lifestyle, and risk of exposure to parasites. Here are some general guidelines:

  • 1. Kittens: As mentioned earlier, kittens should be dewormed at two, four, and six weeks of age and then regularly until they reach six months old.
  • 2. Adult Cats: For indoor cats with low exposure to parasites, deworming may be done every three to six months. Cats with a higher risk of exposure, such as outdoor cats or those with a history of parasite issues, may need more frequent deworming. Your veterinarian will provide a personalized deworming schedule based on your cat's specific needs.
  • 3. Pregnant and Nursing Cats: Pregnant and nursing cats should be dewormed to prevent the transmission of worms to their kittens. Consult your veterinarian for guidance on the timing and frequency.
  • 4. Outdoor Cats: Cats that spend time outdoors or have contact with other animals may need more frequent deworming. Regular check-ups with your veterinarian can help determine the appropriate schedule.

What to Expect After Deworming a Cat?

The timeline for when dewormer takes effect in cats can vary depending on the type of dewormer used and the severity of the infestation. Here's what you can expect after deworming your cat:

1. Immediate Effects: Some cats may show immediate improvement, while others may not exhibit any noticeable changes right away. The dewormer begins to kill the worms upon administration, but it may take some time for the cat's body to expel the parasites.

2. Worm Elimination: In the days following deworming, you may notice dead worms in your cat's feces. This is a positive sign that the treatment is working, as it indicates the expulsion of the parasites. However, not all cats will pass visible worms.

3. Symptom Resolution: If your cat had symptoms of worm infestation, such as vomiting, diarrhea, or a distended abdomen, these symptoms may gradually improve within a few days to a week after deworming.

4. Follow-up Care: Your veterinarian may recommend a follow-up appointment to ensure the dewormer is effective and that your cat is free from parasites. During this visit, your cat's feces may be tested to confirm the absence of worms.

It's important to note that some dewormers may require multiple doses to effectively eliminate certain types of worms. Your veterinarian will provide guidance on the specific treatment plan for your cat's condition.

Are Kittens Born with Worms?


Yes, kittens can be born with worms. The most common type of worms passed from mother cats to kittens is roundworms. These worms can be transmitted through the placenta during pregnancy or through the mother's milk during nursing. It's essential to deworm both the mother cat and her kittens to prevent the infestation from worsening.

When to Deworm Kittens?

Deworming kittens should be done as part of their routine veterinary care. Kittens are typically dewormed at the following stages:

  • 2 Weeks of Age: At around two weeks of age, kittens can be dewormed for the first time. This initial deworming helps eliminate any roundworms they may have acquired from their mother.
  • 4 Weeks of Age: Deworming is repeated at four weeks to further address any roundworms and to target other types of worms, if necessary.
  • 6 Weeks of Age: At six weeks, kittens are dewormed again to ensure any remaining parasites are eradicated.
  • 8 Weeks of Age and Beyond: After the initial series of deworming treatments, kittens are typically dewormed on a monthly basis until they reach around six months of age. After this point, the frequency may decrease to quarterly or as recommended by your veterinarian.

Types of Worms in Cats

To better understand how long it takes for dewormer to work on cats, it's essential to be aware of the common types of worms that can affect them:

1. Roundworms (Toxocara cati): These are the most common intestinal parasites in cats and can be transmitted from mother to kittens. They are long, white, and spaghetti-like in appearance.

2. Tapeworms (Dipylidium caninum and Taenia taeniaeformis): Tapeworms are flat, segmented worms that can be found in a cat's digestive system. They are often transmitted through the ingestion of infected fleas or rodents.

3. Hookworms (Ancylostoma and Uncinaria): Hookworms are tiny, thread-like worms that attach to the lining of the cat's intestine and feed on blood. They can lead to anemia and other health issues.

4. Whipworms (Trichuris vulpis): These are less common in cats but can be found in some cases. They are thin, whip-like worms that inhabit the cecum and colon.

5. Heartworms (Dirofilaria immitis): Heartworms are a potentially deadly parasite that affects a cat's cardiovascular system. Prevention is key, as treatment can be challenging.

6. Lungworms (Aelurostrongylus abstrusus): Lungworms primarily affect a cat's respiratory system and are contracted by ingesting infected snails or slugs.

Symptoms of Worms in Cats

Recognizing the symptoms of worm infestations in cats is crucial to prompt treatment. The symptoms can vary depending on the type and severity of the infestation.

Common symptoms of worms in cats include:

1. Vomiting
2. Diarrhea
3. Lethargy
4. Weight loss
5. Potbellied appearance
6. Visible worms in feces
7. Bloody stool
8. Coughing (in the case of lungworms)
9. Scooting (dragging their rear end along the ground, indicating discomfort around the anus)


It's important to note that some cats may not exhibit any noticeable symptoms, even if they have a worm infestation. Regular veterinary check-ups and fecal exams are essential for early detection.

Conclusion:

How Long Does Dewormer Take To Work On Cats
How long it takes for dewormer to work on cats can vary depending on factors such as the type of dewormer, the severity of the infestation, and the individual cat's response. It's crucial to work closely with your veterinarian to determine the best deworming strategy for your feline companion. Regular preventative care, including deworming as needed, is essential to ensure your cat's ongoing health and happiness. By staying vigilant and following your veterinarian's guidance, you can keep your cat free from these pesky parasites and enjoy a long and healthy life together.

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