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Tri-Heart Plus Chewable Tablets

(1,179 reviews)
Veterinary Diet Item
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Tri-Heart Plus Chewable Tablets

$29.99
One-time purchase
$29.99 AutoShip
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Product Overview

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).
For use in puppies (ages 6 weeks and up) and dogs.
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.
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).
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.
Ivermectin/Pyrantel
Contact your closest emergency animal hospital.
You may also contact Merck Animal Health Pharmacovigilance: Companion Animal Technical Services, 800-224-5318.
  • 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.
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
Merck Animal Health
A single beef-flavored chewable should be administered on the same day each month.
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
Tri-Heart Plus contains the active ingredients Ivermectin/ and Pyrantel. It is manufactured by Merck Animal Health.

About This Product

Customer Reviews

4.9
1,179 reviews
5 1132
4 35
3 0
2 0
1 12
Customer review photo
Gena W Verified Purchase
September 15, 2025

Great

My dog is very picky. She likes Tri-heart chewables. I cut it in 4 pieces and tell her they're goodies, & she eats them. Allivet gives great service.

Patricia m Verified Purchase
October 16, 2024

These Chewable Tablets have kept our Jenny healthy, for the past 8 years. They were recommended by our awesome veterinarian. Thank you Allivet, for your GREAT customer service!

Becky P
September 15, 2023

I switched from HeartGuard to triHeart Both Same ingredients. Switched our 12yr St.Bernard =English Setter Mix and is 128lbs But sometime since older after give the med to her she would have stomach upset and cough. Had vet approval. After switching to this she didn’t have tummy upset and didn’t have cough after taking. Our 2yr St.Bernard doesn’t have any problems with either

TERRI H
January 31, 2023

This product works great for my XXXL Great Dane!

LAURA A Verified Purchase
December 6, 2022

My Baby needs this medicine for her heartworms treatment

Ana C
December 6, 2022

I have been buying Tri-Heart tablets from Allivet for my two dogs for so many years. They work as well as the more expensive medications. Shipping is free for Tri-Heart. Allivet always gives fast and reliable shipping.

Debbie M
November 10, 2022

I’ve been using this product for almost 10 years and it’s worked wonderfully for my dogs. They love the taste and it’s so easy to give. Every year they are heartworm free.

Chrissy
October 19, 2022

Love the free shipping!

Amy
October 12, 2022

I have been using Tri-heart plus since moving to Georgia two years ago. The price is right and it works!

Christine H Verified Purchase
October 8, 2022

To keep my dog safe!

Lindsay M Verified Purchase
October 4, 2022

The price is right and it’s FREE shipping for this order!

Janet N Verified Purchase
August 4, 2022

This product, originally prescribed for my last fur baby, kept her free from parasites. She lived to be 15 yrs. old. Also, Allivet offers the best, most cost effective prices as well as prompt, efficient delivery, right to my home.

Christine J Verified Purchase
July 20, 2022

Excellent price, same ingredients as more pricier products, my dog finds it palatable

Alexandra M Verified Purchase
July 13, 2022

Keeping my pets healthy, with top brand pet meds, that don’t cost me an arm and a leg.

Candice M Verified Purchase
June 17, 2022

Cheaper than Heartgard! Love this product.

Denise J Verified Purchase
June 17, 2022

I have been using this online Pharmacy for years. Reliable, prices are great, shipping costs are usually $0 and they get authorization from Family vet pretty quickly. Orders arrive usually within a week's time.

Barbara N Verified Purchase
May 6, 2022

Great pharmacy for animals

Sherrill H Verified Purchase
March 31, 2022

Great trustworthy medication for your pet.

Annette B Verified Purchase
March 31, 2022

the price is unbeatable

Melba L Verified Purchase
March 23, 2022

I did my research comparing what each medicine kills and price and he best deal is to buy Tri-Heart Plus.

William E Verified Purchase
March 10, 2022

EAy and fast, MY Buddy Dog loves them too.

Edward G Verified Purchase
March 9, 2022

My dogs are "picky" when taking medication. Had a hard time finding a brand they will willingly eat without difficulty. This is it.

Frances s Verified Purchase
March 9, 2022

Very happy that i found your site,

Richard D Verified Purchase
February 24, 2022

Works as it should!

Ivana C Verified Purchase
February 8, 2022

My dogs have done very well with Tri-Heart Plus, and they take it as if it was a treat. We are all happy, dogs and family! 😊

Joseph J Verified Purchase
February 8, 2022

The price was the lowest and ordering was simple.

Michele T Verified Purchase
February 4, 2022

I had no idea I could get Tri-heart to do the work of the Heart#@#@ brand at a fraction of the price. Am so have found this and Allivet is great at getting this to me on time every month.

Linda S Verified Purchase
January 25, 2022

Reasonable price for reputable product

John S Verified Purchase
January 25, 2022

Gives me piece of mind, my pets are healthy and well overall.

Donna D Verified Purchase
January 25, 2022

Cost effective and good product

Norene R Verified Purchase
January 25, 2022

no problems with ordering and best price

Michael S Verified Purchase
January 7, 2022

Prompt and simple

Pat L Verified Purchase
January 5, 2022

Best prices. Easy and they follow up if Vet. hasn't sent the approval.

Robert L Verified Purchase
December 14, 2021

good product per vet

Yvonne W Verified Purchase
December 9, 2021

My dog loves these and he is picky!

C.J. G Verified Purchase
December 7, 2021

cost. value.good product

Sandra S Verified Purchase
November 17, 2021

Love Allivet! Always has what I need at a great price, and free shipping!!

Patti P Verified Purchase
November 15, 2021

Effective product

Lee S Verified Purchase
November 11, 2021

This is a great price for this product. It was also easy to add my Vet when she moved. The company will confirm it. Love when things are easy!

Mel T Verified Purchase
November 8, 2021

GREAT PRODUCT USED FOR YEARS

Julie W Verified Purchase
November 3, 2021

Great product - cheaper than Heartguard!

Cheryl A Verified Purchase
October 15, 2021

Excellent protection from heart worm! Have used this product with perfect results for the past 7 years.

Vicki R Verified Purchase
September 29, 2021

Great way to keep your pets safe

Frank H Verified Purchase
September 7, 2021

Received my shipment instantly!

Mark E Verified Purchase
September 2, 2021

good price, works well...

Cheryl W Verified Purchase
September 2, 2021

Good product. My dog has no reaction to it.

Desiree P Verified Purchase
August 24, 2021

2nd best to Heartgard! My fur baby has been on this one for about 4 years. Never had any issues with this medication.

Robby W Verified Purchase
August 18, 2021

works great

Eva S Verified Purchase
August 5, 2021

Did a search for this product for my boy and this was the best affordable price and product for him.

Andrew K Verified Purchase
August 2, 2021

Great product at a great price!!

Rosalinda G Verified Purchase
July 25, 2021

no problem feeding them TriHeart Plus

Irene P Verified Purchase
July 23, 2021

It is more affordable for me.

Merilyn S Verified Purchase
July 12, 2021

Same as Heartguard but vastly less costly

Lisa S Verified Purchase
July 8, 2021

My puppy's mom died from Heartworm so keeping them safe is an absolute need for me. Thank you Allivet for helping do just that.

Keith t Verified Purchase
July 8, 2021

dog eats it out of my hand and way cheper than vet and dont have to make an oppointment

John S Verified Purchase
June 26, 2021

My dog loves the test of this product so I have no trouble getting her to swallow the medicine. No adverse reaction to the medicine and she hasn't had any heart worm problems.

Leslie P Verified Purchase
June 26, 2021

Used for years

Robin T Verified Purchase
June 22, 2021

service and price!!

Suzanne S Verified Purchase
June 17, 2021

same meds as HeartGuard plus but much less expensive

Dr M R Verified Purchase
June 17, 2021

This was recommended by a good friend and animal lover as being the best product!

Mary H Verified Purchase
June 8, 2021

Reasonably priced heartworm meds for both my dogs...

Ileana W Verified Purchase
June 8, 2021

Great product having been using for years

Melissa B Verified Purchase
June 8, 2021

Allivet is AWESOME! Amazing customer service, fast shipping and GREAT PRICES!

Jennifer M Verified Purchase
June 8, 2021

Our dog actually takes this medicine so for that reason alone it is worth 5 stars. We battled for nearly a year trying to get our dog to eat another brand of heartworm medicine and nothing worked. NOTHING. She became a master at eating the food around even a tiny piece of the former medicine and would spit the piece back up. Tri-Heart is different. She actually eats it without hesitation and is a tad less expensive too. Win/Win!

B.L. O Verified Purchase
May 27, 2021

Allivet has the best prices, service and products. Tri-Heart Plus is exactly the same as more expensive brands and it keeps my sweet puppy healthy year round. Allivet is my go-to site for Lucy's healthcare.

Lynda S Verified Purchase
May 27, 2021

I use Allivet for the convenience and quality of their products. Tri-Heart Plus chewable tablets makes me feel like I'm doing the best for my fur baby. And Allivet's customer service is outstanding!

Kathy P Verified Purchase
May 20, 2021

Very efficient, caring. Let's you know when vet approved

Randy A Verified Purchase
May 16, 2021

Good price

Jared D Verified Purchase
May 10, 2021

It works for what it is supposed to do.... Supposedly

Linda K Verified Purchase
May 10, 2021

Good products at a fair price!

Christine O Verified Purchase
May 10, 2021

more budget friendly than buying from the vet

Denise H Verified Purchase
May 10, 2021

Best price and free shipping. They contact the vet to get prescription

Ryan C Verified Purchase
May 10, 2021

This is my first time buying the product and while I won’t know for a while how effective it is at preventing heart worm, my dog ate it just fine and doesn’t have any problems with the digestive worms it also prevents. She is an outdoor dog. The service from Allivet.com has been great. We had to work with getting my vet registered and had some back and forth about getting the vet to send the prescription, but Allivet was helpful.

TINA R Verified Purchase
May 3, 2021

previously taking trifexis, very expensive

Erika M Verified Purchase
May 3, 2021

Love this stuff. She eats it no problem and it provides perfect protection for a generic price

Anke W Verified Purchase
May 3, 2021

easy to administer to my dogs and covers both heartworms and hookworm infections

Dale T Verified Purchase
May 3, 2021

Have used this heart medication on all my dogs with no problems. It is priced right also.

Diane B Verified Purchase
May 3, 2021

We have 4 dogs

Lynda S Verified Purchase
May 3, 2021

The price is right

Matthew O Verified Purchase
May 3, 2021

Simple, fast & economical!

Gloria D Verified Purchase
May 3, 2021

Does the job and I can hide it in his kibble!

Diane J Verified Purchase
May 3, 2021

Can't beat the price.

Lynda S Verified Purchase
May 3, 2021

Best price around

Joanne M Verified Purchase
May 3, 2021

My pet loves them. I love the easiest to give him.

RON S Verified Purchase
May 3, 2021

easy prosses , fast shipping

George Z Verified Purchase
May 3, 2021

My dog likes them

Sandra S Verified Purchase
May 3, 2021

Fast, quality meds for less. Will contact Vet when needed.

CAROL K Verified Purchase
May 3, 2021

Excellent price. Same protection as the more expensive brands. Fast shipping.

Sue U Verified Purchase
May 3, 2021

Awsome

Patricia W Verified Purchase
May 3, 2021

Beats prices at the Vet's office.

Mary L Verified Purchase
May 3, 2021

Vet recommendation

Efrain J Verified Purchase
May 3, 2021

Best price.

Dave H Verified Purchase
May 3, 2021

Received order quickly.

Carol H Verified Purchase
May 3, 2021

I want my pet protected by any means necessary

Bonnie S Verified Purchase
May 3, 2021

Their prices are unbeatable, quick with delivery n the auto ship is a plus!

TINA R Verified Purchase
May 3, 2021

she was taking trifexis which is very expensive

Jim S Verified Purchase
May 3, 2021

works for zues-no problems

Toni R Verified Purchase
May 3, 2021

Zero stars on this product. Both dogs had skin issues right after taking this product, Starts out as itching and chewing, red,-raised hot spots, then skin crusting over, hair falling out, black scab in center with white crusty build up around the outside. Funny because we have used other ivermectin products.

DAVID J Verified Purchase
May 3, 2021

good price

Traci R Verified Purchase
April 26, 2021

reasonably priced, qualifying medication

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