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Tri-Heart Plus Chewable Tablets Rx

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Product Overview

How To Use

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Questions & Answers

Product Description

Tri-Heart Plus Chewable Tablets prevent canine heartworm disease resulting from Dirofilaria immitis. They also control and treat hookworms (Ancylostoma braziliense, Uncinaria stenocephala, and Ancylostoma caninum) and roundworms/ascarids (Toxascaris leonina and Toxocara canis). This medication and Heartgard Plus contain the same active ingredients (Pyrantel and Ivermectin).

Who is Tri-Heart Plus Chewable Tablets for?

For use in puppies (ages 6 weeks and up) and dogs.

Why use Tri-Heart Plus Chewable Tablets?

Tri-Heart Plus Chewable Tablets contain Pyrantel and Ivermectin to prevent heartworms, along with other harmful parasites. These tablets are proven, easily-administered, and cost-effective.

How does Tri-Heart Plus Chewable Tablets work?

These chewable Pyrantel and Ivermectin tablets prevent your dog from getting heartworm disease. They eliminate heartworm larvae (Dirofilaria immitis) in the tissue stage for a full month following infection. They also control and treat roundworms (ascarids - Toxascaris leonina and Toxocara canis) and hookworms (Ancylostoma braziliense, Uncinaria stenocephala, and Ancylostoma caninum).


Merck Animal Health

Active ingredient(s):


How is Tri-Heart Plus Chewable Tablets sold?

Sold in 6 or 12 month supplies based on your dog's weight. Boxes are color coded as follows:
  • Blue: 1-25 lbs
  • Green: 26-50 lbs
  • Brown: 51-100 lbs

What are the side effects of Tri-Heart Plus Chewable Tablets?

The most frequently reported adverse reactions include:
  • Hypersalivation
  • Convulsions
  • Staggering
  • Ataxia
  • Mydriasis
  • Diarrhea
  • Anorexia
  • Vomiting
  • Lethargy
  • Depression
In a low percentage of treated dogs, neurological or digestive effects could occur.

What special precautions are there?

  • Keep away from children.
  • If accidental human ingestion occurs, seek emergency medical attention.
  • Your dog should be tested for existing heartworms prior to Tri-Heart treatment. This medication is not effective against adult heartworms. Infected dogs should be treated to remove adult heartworms and their microfilariae prior to treatment with Tri-Heart.

What to do if overdose?

Contact your closest emergency animal hospital.
You may also contact Merck Animal Health Pharmacovigilance: Companion Animal Technical Services, 800-224-5318.

How can I store Tri-Heart Plus Chewable Tablets?

Store in a dry and cool environment.

Helpful Tips:

A single beef-flavored chewable should be administered on the same day each month.

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.


Tri-Heart Plus Dosage by Weight

Dog’s Weight / Chewable Tablets / Ivermectin Content / Pyrantel Content / Color Coding of Product
Up to 25 lbs               1                             68 mcg                      57 mg                       Blue
26 to 50 lbs                1                           136 mcg                     114 mg                     Green
51 to 100 lbs              1                            272 mcg                    227 mg                    Brown

Main Ingredients

Tri-Heart Plus contains the active ingredients Ivermectin/ and Pyrantel. It is manufactured by Merck Animal Health.

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Tri-Heart Plus Chewable Tablets

Customer Submitted Questions

What is the country of origin?

1 Answer

how soon will these expire: Triheart Plus 1-25lb Dog

1 Answer

Is Tri-Heart Plus a chewable form like Heartgard or is it more a pill type?

1 Answer

Can Tri-Heart-Plus be used for dogs with a history of seizures

1 Answer

do you need a perscription

1 Answer
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