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Iverhart Plus Rx

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Product Overview

How To Use

What’s in it?


Questions & Answers

Product Description

Iverhart Plus Flavored Chewables (ivermectin/pyrantel) are used in the prevention of canine heartworm disease. This medication eliminates heartworm larvae (Dirofilaria immitis) in the tissue stage, providing 30 days of protection following infection. It also controls and treats hookworms (Ancylostoma braziliense, Uncinaria stenocephala, Ancylostoma caninum) and ascarids (Toxascaris leonina and Toxocara canis). See the Allivet Heartworm Comparison chart to find which heartworm prevention is best for your pet.

Who is Iverhart Plus for?

For use in dogs.

Why use Iverhart Plus?

Iverhart comes in the form of an easy, once-monthly flavored tablet.

How does Iverhart Plus work?

Iverhart Plus eliminates the tissue stage of heartworm larvae.


Virbac Animal Health

Active ingredient(s):

Each flavored chewable 68 mcg ivermectin and 57 mg pyrantel as pamoate salt

How is Iverhart Plus sold?

Sold in 1, 3, or 6 month supplies dependent on your dog's weight:
  • Blue: up to 25 lbs
  • Green: 26 to 50 lbs
  • Brown: 51 to 100 lbs

What are the side effects of Iverhart Plus?

In rare cases, the following reactions could occur:
  • Diarrhea
  • Vomiting
More likely reactions include:
  • Hypersalivation
  • Convulsions
  • Staggering
  • Ataxia
  • Mydriasis
  • Anorexia
  • Vomiting
  • Lethargy
  • Depression

What special precautions are there?

  • Certain Collie breeds are more sensitive to the ingredients of Iverhart than other breeds.
  • Efficacy is marginally reduced in dogs with parvovirus.

What to do if overdose?

Contact your closest animal hospital.

How can I store Iverhart Plus?

Store in a dry and cool place.

Helpful Tips:

Use product on or before the expiration date. Discard or return unused product.

Pharmacists are standing by to offer Pet Parent counseling regarding prescription medication purchased from Allivet before and after dispensing. Pharmacists on duty are available Monday-Friday, 9:30AM - 5:30PM EST and will be on call Saturday 12:00PM - 4:00PM EST for consultation.


Dog Weight

Per Month

Ivermectin Content

Pyrantel Content

Color Coding
on Foil-Backing
and Carton

Up to 25 lbs


68 mcg

57 mg


26 to 50 lbs


136 mcg

114 mg


51 to 100 lbs


272 mcg

227 mg


Main Ingredients

Each flavored chewable 68 mcg ivermectin and 57 mg pyrantel as pamoate salt

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Iverhart Plus

Customer Submitted Questions

Do you need a prescription for this?

1 Answer
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