Tri-Heart Plus Chewable Tablet for Dogs, 26-50 lbs, (Green Box), 12 Chewable Tablets (12-mos. supply)

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$73.98 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$73.98 Chewy Price
($6.16 /ea)

In Stock
FREE delivery
Usually arrives in 3-5 days
Prescription approval made easy
We’ll reach out to your vet clinic.

No interest if paid in full in 6 months on PayPal purchases of $149+. .

Medications ship separately. Delivery times may vary.

About This Item

Details

  • Prevents heartworm disease, treats, and controls roundworms and hookworms
  • Kills heartworm larvae before they reach your dog�s heart
  • Enjoy year-round protection for your dog, with monthly treatments
  • Easy-to-give, beef-flavored, chewable tablet that your dog will enjoy.
  • Safe for dogs with beef allergies

Ingredients

Instructions

FAQ

Learn More About Tri-Heart Plus From Our Team of Experts
4.8
Rated 4.8 out of 5 stars
1807 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

91% Positive

Effectiveness

91% Positive

Ingredients

90% Positive

Long-Term Benefits

92% Positive

596 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 Merry on Jan 13, 2026

My pups love their Tri-Heart Plus

Both my pups love their Tri-Heart Plus, and it is so easy to give to them; leaving me with the knowledge that I am doing my part in helping to protect my furbabies

Both my pups love their Tri-Heart Plus, and it is so easy to give to them; leaving me with the knowledge that I am doing my part in helping to protect my furbabies since we do have a few pets in our area that have tested positive to Heart Worm.


Rated 1 out of 5 stars
By Eva on Nov 22, 2025

Absolutely messed up service and delivery.

I noted my change of address and vet on the order form. But the heart worm medication was delivered to my old address. I had paid for two packages. When it was replaced

I noted my change of address and vet on the order form. But the heart worm medication was delivered to my old address. I had paid for two packages. When it was replaced I only received one. And no one on your end could figure out how to send me the second box. Eventually I had to ask for a refund because everyone was so incompetent.


Rated 5 out of 5 stars
By Julia on Oct 20, 2025

I used it for many years for my last dog, Jayney. .

I didn't know anything amazing about it. It was a pesticide I gave my dog to prevent a terrible possible condition. If I have to give my dog a pesticide, I would

I didn't know anything amazing about it. It was a pesticide I gave my dog to prevent a terrible possible condition. If I have to give my dog a pesticide, I would prefer to give the least amount possible---against the worst thing, heartworm, and if fleas or ticks appear, they will be treated separately. My dogs have not had flea problems for many years and there is not a lot of risk for ticks.


Rated 5 out of 5 stars
By BUELL on Dec 8, 2025

Tri-Heart (BOOMER thinks it's Candy)

Yes, I know he is a 100lb. Lab in a 130 lb. Lab body. He doesn't do good with his dieting and loves his Chewy snacks! ( Especially his Duck strips) He's HOOKED

Yes, I know he is a 100lb. Lab in a 130 lb. Lab body. He doesn't do good with his dieting and loves his Chewy snacks! ( Especially his Duck strips) He's HOOKED on QUACK?


Rated 5 out of 5 stars
By Gail on Dec 10, 2025

Practical Meds

The pill is large but my dog swallows it wrapped in cheese. These are very affordable per month and I like the fact I am not overloading my doggy with too much meds

The pill is large but my dog swallows it wrapped in cheese. These are very affordable per month and I like the fact I am not overloading my doggy with too much meds per month.


Rated 5 out of 5 stars
By Melissa on Oct 17, 2025

great customer service at Chewy provides and the great products at good prices

I think the item is a really good alternative to the heart guard because although that’s a very good product, this is just as good and it’s added a better budget

I think the item is a really good alternative to the heart guard because although that’s a very good product, this is just as good and it’s added a better budget friendly price. I believe in the ivermectin heart guard type medicines rather than interceptor. That’s just what works for My dog.


Rated 3 out of 5 stars
By Anna on Nov 29, 2025

Best Option?

Dog likes them, thinks they’re a treat. I’m not sure if this is best option as general wormer because it doesn’t protect against as many types of worms as another

Dog likes them, thinks they’re a treat. I’m not sure if this is best option as general wormer because it doesn’t protect against as many types of worms as another popular brand.


Rated 5 out of 5 stars
By Margi on Dec 22, 2025

Always reliable Chewy service!

You can count on Chewy to get you what you need for your pet in a timely fashion, and always well packaged.

You can count on Chewy to get you what you need for your pet in a timely fashion, and always well packaged.


Rated 5 out of 5 stars
By Karen on Oct 8, 2025

Good product, nice price

My dog eats these, no problem. He has been on these monthly for 3years. We live in a prevalent heart worm area and he has been kept safe with this med. I set

My dog eats these, no problem. He has been on these monthly for 3years. We live in a prevalent heart worm area and he has been kept safe with this med. I set an alarm on my phone for monthly reminders, which is important to not skip a dose.


Rated 5 out of 5 stars
By Paul on Nov 22, 2025

Best price

There’s nothing amazing or special about this item. It is simply the lowest price that I could find online for monthly heartworm protection.

There’s nothing amazing or special about this item. It is simply the lowest price that I could find online for monthly heartworm protection.