Dewormers Dogs & Cats

Pyrantel for dogs and cats

Treats roundworms and hookworms. It is also in several heartworm combination chews. [1]

Last reviewed: October 2026 · 2 sources · see sources

Quick answerPyrantel (pyrantel pamoate) is a over the counter medicine for dogs and cats. It paralyzes the worms so they pass out in the stool. The most common side effects: rare.

Key facts

Generic namePyrantel pamoate
Common brand namesNemex, Strongid
Used inDogs & Cats
TypeDewormers
Prescription?Over the counter (ask your vet first)
Typical US priceNot listed (no reliable public source)

What it's used for

Treats roundworms and hookworms. It is also in several heartworm combination chews. [1]

How it works

It paralyzes the worms so they pass out in the stool. [1]

Side effects and cautions

Common side effects: Rare. Nausea, vomiting, low appetite or diarrhea. [1]

Use with care: Avoid in very weak or frail pets. [1]

Call your vet right away if your pet has trouble breathing, facial swelling, hives, collapse, or any side effect that is severe or getting worse.

About dosingDosing is your vet's call. We don't list doses because the right amount depends on your pet's weight, age, health and other medicines. Don't change a dose or stop a medicine without asking your vet, and never give a pet medicine meant for people unless your vet tells you to [2].

What it costs

We don't list a price for this one because we couldn't find a reliable public source. Ask your vet or pharmacy for a quote; prices depend on your pet's size, the dose and where you fill it.

Pyrantel FAQ

What is Pyrantel used for in dogs and cats?

Treats roundworms and hookworms. It is also in several heartworm combination chews.

What are the side effects of Pyrantel?

Rare. Nausea, vomiting, low appetite or diarrhea.

Does Pyrantel need a prescription?

Many forms are sold without a prescription. Still, check with your vet first. Pet doses and safe products are not the same as for people.

How much Pyrantel should I give my pet?

Only your veterinarian can tell you. The right dose depends on your pet's weight, health and other medicines, so we don't list doses. Never give a pet a medicine prescribed for a person or another animal without asking your vet.

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This page is general information for pet owners, not veterinary advice. Talk to your vet about your own pet.

Sources (2) — tap to show
  1. VCA Animal Hospitals – Pyrantel pamoate (veterinary drug handout)
  2. FDA – Frequently asked questions about animal drugs