Dog Deworming Guide: Treatment, Benefits, and Process (2026)

Dog Deworming Guide: Treatment, Benefits, and Process (2026)

Dog Deworming Guide: Treatment, Benefits, and Process (2026)

Dr. Mafalda Sardinha

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This article has been reviewed by Dr. Soheyl Simaei

A dog is being calm while receiving the deworming medication from a vet.

In This Article

In This Article

Key Takeaways

Dewormers vary by their main component depending on the type of parasite involved in the infection.

Puppies should start deworming at 2 weeks of age. 

A professional deworming appointment consists of a full exam, fecal and diagnostic tests, and medication.

Deworming is the process of eliminating intestinal and internal parasites from your pet’s body. The right dewormer for dogs depends on age, weight, symptoms, health status, and the specific parasite. 

It’s considered a significant part of routine pet care, including vaccinations and external parasite preventives. 

What Is the Best Dewormer for Dogs?

It depends on the specific worm or parasite. Our veterinarians carefully select deworming treatments, emphasizing a specific component for each parasite. Here’s an overview: 

Parasite

Main Treatment Ingredient

Roundworms

Fenbendazole and pyrantel pamoate

Tapeworms

Praziquantel

Hookworms

Fenbendazole and pyrantel pamoate

Whipworms

Fenbendazole and febantel

Heartworms

Melarsomine dihydrochloride

Giardia

Fenbendazole and metronidazole 

Coccidia

Sulfadimethoxine 

Types of Deworming Medicine for Dogs

Deworming medications can be grouped into broad-spectrum and targeted categories. Broad-spectrum dewormers treat multiple types of parasites, while targeted dewormers treat a specific parasite. 

These may come in forms such as:

  • Chewable tablets

  • Standard pills

  • topicals 

  • Liquids and pastes

  • injections

A pet owner is asking help from a veterinarian about his dog's deworming schedule.

When Should Puppies and Dogs Start Deworming?

Puppies should get dewormed starting at 2 weeks of age. This must be repeated every 2 weeks until they reach 12 weeks of age. 

After the 12-week series, the schedule will switch to monthly deworming treatments until they reach 6 months of age. By this time, dewormers for dogs must be administered every 3-4 months based on lifestyle and risk of exposure. 

Puppy and Dog Deworming Schedule

Age

Deworming Frequency

2 weeks

Every 2 weeks

12 weeks

Every month

6 months

Every 3-4 months

According to Dr. Soheyl Simaei, our head vet, deworming is especially important for puppies because their immune systems are still developing. Puppies may contract worms during birth or nursing. 

Adult dogs, even with their developed defenses, will still need preventive treatments to stay safe. High-risk dogs, including those who always visit outdoor dog parks, daycares, boarding facilities, and grooming salons, will require more frequent treatment.

Ideally, our veterinarians recommend annual parasite checkups to confirm your dog’s health and happiness. 

Need help with your dog's parasite protection?

Need help with your dog's parasite protection?

Schedule a visit with our vets.

Schedule a visit with our vets.

What Is Included in Veterinary Deworming?

Our clinic specializes in treating parasitic infections and preventing future threats. We provide a full examination, stool sample tests, and targeted medications. 

A physical exam is essential to assess your dog’s overall health and symptoms, and to determine weight, ensuring an accurate dose. Fecal testing is done by obtaining a fresh sample for microscopic examination. This will allow us to identify the specific type of parasite. 

How Can Professional Deworming Benefit My Dog?

Veterinary deworming treatments for dogs ensure the precise use of medications. It’s an essential preventive measure that protects them from life-threatening parasites. Overall, it also supports gut stability, promotes steady development, improves quality of life, and lowers the risk of transmission.

Our veterinarians also recommend deworming to prevent serious diseases such as:

A veterinarian is examining a brown dog inside the clinic before giving the dewormer.

What Are the Types of Parasites Our Vets Treat in Dogs?

Parasite

Symptoms 

Roundworms

Pot-bellied appearance, diarrhea, vomiting, weight loss, poor growth, and respiratory distress.

Tapeworms

Scooting, excessive grooming at the rear, visible segments, and vomiting. 

Hookworms

Pale gums, weakness, rapid breathing, bloody diarrhea, vomiting, and weight loss. 

Whipworms

Bloody diarrhea, straining to defecate, weight loss, anemia, dehydration, and stomach pain.

Heartworms

Coughing, reluctance to exercise, lethargy, difficulty breathing, fainting, and heart failure. 

Giardia

Persistent diarrhea, weight loss, lethargy, and excess mucus in feces. 

Coccidia

Dehydration, lethargy, vomiting, watery diarrhea, abdominal pain, and weight loss. 

Are There Side Effects for Dewormers for Dogs?

Dog deworming treatments are safe and effective, but there might be some mild side effects that may resolve within 24-48 hours, such as:

  • Vomiting

  • Diarrhea

  • Lethargy

  • Decreased appetite

  • Nausea

In very rare cases, some dogs may experience severe side effects such as hives, difficulty breathing, facial swelling, or neurological issues. Always monitor your dog after treatment and call our veterinarians if you notice anything unusual. 

“Protecting our dogs internally helps them stay happy externally.”

- Dr. Mafalda Sardinha

Dog deworming is a quick and simple procedure that provides long-term protection for your best friend. It helps prevent dangerous parasites from causing severe diseases that could threaten your dog’s life and well-being. When you have a complete schedule, you provide complete protection. 

Frequently Asked Questions

Can my dog’s parasites spread to humans?

Yes, some parasites are zoonotic, meaning they can spread to humans. These include roundworms, hookworms, and Giardia. 

Can my dog’s parasites spread to humans?

Yes, some parasites are zoonotic, meaning they can spread to humans. These include roundworms, hookworms, and Giardia. 

How long does the treatment take? 

It takes only a few seconds to a few minutes to administer the medicine. However, the medication will take about 2-6 hours after administration to eliminate or paralyze the parasites. 

How long does the treatment take? 

It takes only a few seconds to a few minutes to administer the medicine. However, the medication will take about 2-6 hours after administration to eliminate or paralyze the parasites. 

Can I deworm my dog at home?

Yes, you can deworm your dog yourself using over-the-counter medications, but we recommend visiting the clinic for a consultation. It’s best to have a full examination first to determine the parasite and medication required. 

Can I deworm my dog at home?

Yes, you can deworm your dog yourself using over-the-counter medications, but we recommend visiting the clinic for a consultation. It’s best to have a full examination first to determine the parasite and medication required. 

Do indoor dogs still need dewormers?

Yes, even indoor dogs require deworming treatments to stay safe from parasites, even if they never go outside. Roundworms, hookworms, and tapeworms can easily be brought inside through contaminated soil, fleas, or mosquitoes. 

Do indoor dogs still need dewormers?

Yes, even indoor dogs require deworming treatments to stay safe from parasites, even if they never go outside. Roundworms, hookworms, and tapeworms can easily be brought inside through contaminated soil, fleas, or mosquitoes. 

What happens if you never deworm your dog?

Failing to deworm your dog will lead to severe health issues when they get infected. This includes chronic organ damage, malnutrition, anemia, and even death.

What happens if you never deworm your dog?

Failing to deworm your dog will lead to severe health issues when they get infected. This includes chronic organ damage, malnutrition, anemia, and even death.

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