Active Ingredients in Wormers

When selecting the appropriate dewormer for your pet, consider the safety and effectiveness of the product’s active ingredient:

Pyrantel Pamoate: A very safe and effective ingredient to treat roundworms, hookworms and pinworms in dogs. Need to dose a second or even third time, 2-4 weeks apart, to eliminate all stages of the worms.

Piperazine: Effective against two types of roundworms in dogs and cats. For maximum effectiveness, must be administered at least two times (10-14 days apart) to the pet.

Fenbendazole: A very broad spectrum anthelmintic (dewormer) used in both small and large animals. In dogs, it is effective against roundworms, hookworms, whipworms and even giardia. Treatment is once a day for three consecutive days.

Praziquantel: The drug of choice for treating adult tapeworm infections in both dogs and fish. Does not kill the tapeworm eggs, so there is a potential for reinfection. To prevent this from happening, pets should be retreated on a regular basis.

Ivermectin: Most commonly used as a monthly preventative for heartworm in dogs and cats. It is also effective against external parasites such as lice, mange and ear mites.

View all of our wormers

The materials, information and answers provided through this website are not intended to replace the medical advice or services of a qualified veterinarian or other pet health care professional. Consult your own veterinarian for answers to specific medical questions, including diagnosis, treatment, therapy or medical attention.

Return to Articles