Available Now!

Tri-Heart Plus Chewable Tablet for Dogs 51-100 lbs

$49.99

Shipping calculated at checkout

Merck SKU: 73919-MER Barcode: 300611353039

Size: 6 Chewable Tablets

Add to Cart

Tri-Heart Plus for Dogs 51-100 lbs

Monthly Protection Against Heartworms & Intestinal Parasites

Tri-Heart Plus for Dogs 51-100 lbs is a veterinarian-recommended oral chewable tablet formulated to prevent heartworm disease and control common intestinal parasites in large dogs. This monthly preventive combines two active ingredients — ivermectin and pyrantel — to deliver dual-action protection against deadly heartworms, roundworms, and hookworms.

Designed specifically for dogs weighing between 51 to 100 pounds, Tri-Heart Plus ensures that larger breeds receive effective, body-weight-appropriate protection. With a beef-flavored chewable format, it's easy to administer and becomes a part of your dog's monthly health routine.

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

Also Available in Other Weight Ranges

Tri-Heart Plus is available in multiple weight-specific formulas to ensure accurate dosing and maximum parasite protection for dogs of all sizes:

Choose the formula that matches your dog’s weight for consistent, vet-recommended parasite protection.

What Are the Benefits of Tri-Heart Plus for Large Dogs (51-100 lbs)?

Tri-Heart Plus offers multiple benefits beyond standard heartworm prevention:

  • Prevents Heartworm Disease: Protects against Dirofilaria immitis, the parasite that causes heartworm.
  • Controls Common Intestinal Worms: Effective against Toxocara canis, Toxascaris leonina (roundworms), and Ancylostoma caninum (hookworms).
  • Beef-Flavored Chewable: Tasty and easy to administer, even for picky eaters.
  • Cost-Effective Alternative: Offers the same active ingredients as Heartgard Plus at a better price point.
  • Veterinarian-Trusted: Proven efficacy and safety when used as directed.
  • Monthly Dosing Schedule: Convenient once-a-month protection.

How Does Tri-Heart Plus Work in Dogs 51-100 lbs?

  • Ivermectin targets immature heartworm larvae (L3 and L4 stages), preventing them from developing into adult heartworms.
  • Pyrantel pamoate is a deworming agent that paralyzes and eliminates intestinal parasites such as roundworms and hookworms.

This dual-action mechanism ensures comprehensive protection for your dog’s cardiovascular and digestive systems.

Why Pet Parents Choose Tri-Heart Plus for Large Dogs

When it comes to protecting large breed dogs, pet owners want trust, affordability, and proven results. Here's why thousands of responsible dog owners prefer Tri-Heart Plus:

  • More Affordable Than Big-Name Brands – Get the same active ingredients as Heartgard at a better value.
  • Vet-Recommended Protection – Trusted by professionals for comprehensive parasite control.
  • Large Breed-Specific Formula – Properly dosed for dogs 51–100 lbs, ensuring effective protection.
  • Tasty Chew Format – No more hiding pills in peanut butter or cheese.
  • Peace of Mind – Monthly routine helps protect your dog year-round from deadly heartworm infections.

Dosage and Administration for Tri-Heart Plus Large Dogs

Always consult your veterinarian for exact dosage instructions depending on your pet's condition.

General Guidelines:

  • One tablet per month for dogs weighing 51–100 lbs.
  • Administer on the same day each month for consistent protection.
  • Can be given with or without food.

What Ingredients Are in Tri-Heart Plus 51-100 lbs?

Active Ingredient

Purpose

Ivermectin 272 mcg

Prevents heartworm larvae

Pyrantel 227 mg

Treats and controls roundworms and hookworms

These ingredients are recognized by the FDA for safety and efficacy in canine heartworm and parasite prevention.

What Are the Possible Side Effects of Tri-Heart Plus?

Side effects are rare but may include:

  • Vomiting or diarrhea
  • Lethargy or decreased appetite
  • Neurological signs in sensitive breeds (e.g., Collies)

If any unusual symptoms occur, discontinue use and contact your vet immediately.

What Warnings and Precautions Should Be Considered?

  • For dog use only – not for cats or other animals.
  • Do not use in puppies under 6 weeks of age.
  • Ensure your dog tests negative for existing heartworm infection before starting treatment.
  • Store at room temperature, away from moisture and light.
  • Keep out of reach of children.

Switching to Tri-Heart Plus? Here’s What to Know

  • Safe to switch from Heartgard or Interceptor after completing the current month.
  • Maintain the same monthly schedule when transitioning.
  • If you're unsure, ask your vet for guidance during the switch to avoid gaps in protection.

Shipping & Returns 

Shipping Policy: HardyPaw offer all types of shipping options (Ground, Express, Priority, International) depending on the urgency of the product requirements. To know about our shipping policy in detail, click here.

Refund policy: If you face any issue with our product and want to return it, read our refund policy carefully.

Tri-Heart Plus for Dogs 51-100 lbs FAQs 

What is Tri-Heart Plus used for?

Tri-Heart Plus is used to prevent heartworm disease and control common intestinal parasites like roundworms and hookworms in dogs.

Is Tri-Heart Plus as effective as Heartgard Plus?

Yes, both contain the same active ingredients (ivermectin and pyrantel) and offer equivalent protection, but Tri-Heart Plus is often more affordable.

Can Tri-Heart Plus be used with other medications?

Generally yes, but always consult your vet to check for drug interactions with other preventatives or treatments.

How quickly does Tri-Heart Plus start working?

It begins working within hours to kill intestinal parasites and prevents heartworm larvae from maturing with monthly use.

Is it safe to give Tri-Heart Plus year-round?

Yes, year-round use is recommended to ensure continuous protection against heartworms and intestinal parasites, especially in warmer climates.

Clinical Research

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)