Tri-Heart Plus Chewable Tablet for Dogs, 51-100 lbs, (Brown Box)

By Tri-Heart Plus
Rated 4.7457 out of 5 stars
Prescription Item

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$39.99Chewy Price

In Stock
FREE delivery
Usually arrives in 3-5 days
We'll collect your pet's prescription information at Checkout.

This item requires prescription approval.

Medications ship separately. Delivery times may vary.

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About This Item


For use in animals only. Your furry friend must have a current heartworm test result on file with your veterinarian in order to be prescribed heartworm medication. Please visit your veterinarian to have this test performed annually to protect your four-legged friend. Tri-Heart Plus is an easy-to-feed chewable tablet prescribed to help keep your dog free of heartworm and other dangerous parasites. When given monthly, this simple and palatable tablet helps to protect your pet by killing the larvae before they reach your dog's heart. Best of all, the tasty tablets can be fed just like a treat! Your pet won't even know you're working to protect their heart.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.

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Play Video: Learn More About Tri-Heart Plus From Our Team of Experts
Learn More About Tri-Heart Plus From Our Team of Experts

ReviewsWrite a Review

Rated 4.7457 out of 5 stars
346 Ratings
Would recommend to a friend

343 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 5 out of 5 stars
By Wendy on Sep 14, 2023

Good buy!

This is less than half the price my vet charges! It must work cause my Beau is heartworm free every time. He chews it right up.

Rated 5 out of 5 stars
By Puppy on Jul 21, 2023

Tri Heart Plus

Fussy dogs both woofed it down-no hesitation. They would not eat the expensive competitors - same drugs- but different smell and taste at 1/2 the price. Absolutely love the no hassle with the dogs!

Rated 2 out of 5 stars
By HonkeyRed on Jul 29, 2023

Whip worms

OMG I just got the test results back & my fur baby has whip worms. I give her this every month, but didn’t realize it didn’t cover whip worms. I feel like a bad mom for not researching better.

Rated 5 out of 5 stars
By Monica on Aug 28, 2023

Great Buy

This is an amazing site to save money on! I am so thankful I can get prescriptions and half the cost. Thank you Chewy!

Rated 5 out of 5 stars
By Subajude on Aug 14, 2023

Great price!

Same product but much less expensive than from the vet and I also no longer need to make a special trip to their office for medication.

Rated 5 out of 5 stars
By LeosMom on Jun 16, 2023

Works Great

We have to give Leo heart worm meds as he swims a lot in warm months in our local lakes & ponds. He fetches sticks & swallows water as he returns to the shore. He happily eats his dinner with one of these Tri-Heart pills mashed up in it. Phew!

Rated 5 out of 5 stars
By Mia on Jul 1, 2023


All I can really say is I’ve been buying this product for my two very healthy dogs for years and they never have tested positive for heartworm-and as always chewy has an amazing price and quick shipping. Highly recommend.

Rated 1 out of 5 stars
By Bertha67 on Jun 8, 2023


I think the product is great. My problem was that Chewy only sent me half of what I ordered, and after a week of emailing back and forth, while everyone was friendly, they were unhelpful and apparently a giant waste of time because they told me to call their pharmacy.

Rated 5 out of 5 stars
By Jack on Jun 5, 2023

Dog likes them

The product is good. They seem to be doing what they should and the dog likes the taste enough to think they’re a special treat. Chewy as always makes everything super easy. There was a 2 day wait while they verified with the vet and then the pills were mailed to us expeditiously.

Rated 5 out of 5 stars
By Dogmom on Aug 1, 2023

All positive

I have always given Tri Heart to my dogs over the years. They never refuse to take it and it works. No pesky worms ever!