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Mebendazole for Dogs: Deworm Roundworms, Hookworms, Tapeworms

Published on September 10, 2024
Updated on April 1, 2026
Reviewed by Petco's Veterinarian Team

Mebendazole is an oral dewormer used to treat parasitic infections in dogs. Due to certain side effects, safer options are preferred by veterinarians when treating these types of parasitic infections.

Summary

Used For:

Roundworm, tapeworm, hookworm and whipworm infection

Brands:

Telmintic

Species:

Dogs

Other names:

Drug type:

Anti-parasitic

Prescription required:

Yes

Pregnancy and lactation:

Do not use in pregnant or lactating animals.

Side effects:

Vomiting, diarrhea or soft stools, depression, jaundice, anorexia

General description

Mebendazole is a dewormer used in dogs for common intestinal parasites, including roundworms, hookworms, tapeworms and whipworms. These parasites are often present in the canine population and regular deworming with medications like mebendazole can help prevent spread in the infection and limit zoonotic infection of these parasites to people. Not approved for use in cats.

Uses

Parasitic disease in dogs. Treatment of 1 type of roundworm (ascarid), 2 types of hookworms, whipworms, and 1 type of tapeworm (not effective against the flea tapeworm) in dogs.

How it works

Mebendazole prevents glucose and nutrient uptake in the parasites, causing them to fail to survive in their host.

Dosage

Dogs: 9-11 milligrams per pound of body weight given in food daily for 3-5 consecutive days depending on the parasite being treated.

Mix with a small amount of food which should be eaten before the pet gets the remainder of the meal to ensure the entire amount of medication is ingested.

Puppies and kittens need to be tested and dewormed frequently according to a worming schedule and as advised by your veterinarian.

Forms

Mebendazole is supplied in powder and tablet form.

Storage information & handling

Store in a tightly closed container at room temperature.

What results can I expect?

Mebendazole begins killing parasites within hours of administration but must be given for 3-5 days to completely kill the parasites.

Missed Dosage

If a dose is missed, continue treatment at the next scheduled dosing time.

Overdose / acute toxicity

May see liver toxicity. Symptoms may include:

  • Vomiting
  • Bloody diarrhea
  • Lack of appetite
  • Jaundice
  • Depression

Contact your veterinarian or the Animal Poison Control Center if you think your pet may have accidentally received or been given an overdose of this medication.

Side effects

May include:

  • Vomiting
  • Diarrhea
  • Soft stools
  • Decreased appetite
  • Liver failure

Contraindications

*Do not give this drug to an animal with any form of liver disease.

*Do not use in animals hypersensitive (allergic) to it.

*Do not use in pregnant or nursing animals.

Drug interactions

No drug interactions listed.

Precaution

Give with food.

Sources

Saunders Handbook of Veterinary Drugs

Disclaimer
The information contained on this page is for educational purposes only. This medication should only be given under the advice of a veterinarian who has examined your pet under the laws applicable to your state of residence.

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