TRI-HEART PLUS Chewable Tablet for Dogs, 26-50 lbs, (Green Box), 6 Chewable Tablets (6-mos. supply) -

Tri-Heart Plus Chewable Tablet for Dogs, 26-50 lbs, (Green Box)

By Tri-Heart Plus
Rated 4.619 out of 5 stars
Prescription Item
Pet Weight
Pet Weight

$29.99Chewy Price
This item requires prescription approval.

Medications ship separately. Delivery times may vary.

In Stock
FREE 1-3 day shipping over $49
We'll collect your pet's prescription information at Checkout.

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 4.619 out of 5 stars
168 Ratings
Would recommend to a friend

167 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 2 out of 5 stars
By JP on May 14, 2023

Something seems to have changed?

This was my 2nd or 3rd order of Tri-Heart, as a cheaper alternative for Heartgard. But something has changed with this order. The tablets are SO hard. My dog has always easily taken these-- but with this new order she absolutely will not eat it. So much for saving money- I will donate the rest of these, and go back to Heartgard. I'm really not sure what they changed, but she won't touch any from the new order, even if I break them up and mix in her food.

Rated 5 out of 5 stars
By Shampoo on Jun 3, 2023

Always a pleasant experience

I have never had a bad experience with this company. When I need to order my dogs prescriptions, I always get help from a representative. They are always so patient and have such a positive attitude. They are a pleasure to do business with!!

Rated 4 out of 5 stars
By Sharbear on Mar 30, 2023

Great Product

This product works just as well if not better than other expensive heart worm medications. I have been using for years as a satisfied customer. I bought my 12 year supply from someone else this year because Chewy prices keep increasing on everything

Rated 5 out of 5 stars
By Denise on Mar 4, 2023

Chewy was so helpful

I have always used this product on my pugs, and just started ordering it from chewy. The customer service team was so helpful, as the vets office fax machine was down for a week. They kept sending emails, because the vet was not responding. I have since changed vets, but kudos to the chewy team for staying on top of it! Thank you so much

Rated 5 out of 5 stars
By Dian on May 21, 2023

Great on all points

Dogs like the taste, so it's easy to give; Service is fast and, and any interaction with representatives is always pleasant.

Rated 3 out of 5 stars
By Vger on Feb 23, 2023


I'm giving the product 3 stars because it's just as good as other heartworm prevention meds. But Chewy's price cannot be beat! About $20 less expensive for the same product from my vet. 5 stars for Chewy!

Rated 5 out of 5 stars
By Rennie on Mar 17, 2023

Gives peace of mind for protection

We always give Wrigley a Heartworm pill each month for his protection, even though he is well protected with all of the good-for-him each month.

Rated 5 out of 5 stars
By Coffeemate1 on Mar 19, 2023

Really love it

Have used this product for years and love it. All my dogs have enjoyed the taste and taken it readily each month!

Rated 5 out of 5 stars
By acf757 on Sep 30, 2022

Generic > name brand

This was my first time ordering a prescription item and will definitely order again. Delivery only took 1 day longer than my regular package so they are super fast with confirming info. As for the meds themselves, they contain the exact same ingredients as the name brand and I have used these for my dogs in the past and they've never gotten heartworms. *Keep in mind testing at the vet can only detect adult heartworms and these meds can only kill larvae so the reviews that say they don't work must have had a lapse in either testing or medication. If you live in the south or your dogs are outside a lot, they should be tested every 6 months instead of once a year + prevention.

Rated 5 out of 5 stars
By Anne on Mar 8, 2023

Great product, great price

This is an amazingly affordable option to prevent heart worm disease in dogs.