Trifexis Chewable Tablet for Dogs, 20.1-40 lbs, (Green Box), 6 Chewable Tablets (6-mos. supply)

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About This Item

Details

  • Trifexis delivers 5-in-1 protection from heartworms, fleas & 3 more intestinal parasites in dogs 5 to 10 lbs.
  • In a well-controlled laboratory study, Trifexis started to kill fleas in 30 minutes and demonstrated 100% effectiveness within 4 hours.
  • Prevents heartworm disease and treats & controls roundworm, hookworm & whipworm infections.
  • Beef-flavored tablets for easy dosing
  • Protecting dogs from parasites for nearly 10 years, 272 million doses distributed (Elanco Animal Health, data on file)

Ingredients

Instructions

FAQ

Learn More About Trifexis From Our Team of Experts

About Trifexis

Dosed By Weight

Trifexis comes in five different strengths to provide custom-tailored dosing for a wide range of dogs. Just one tablet provides the correct amount your pup needs to protect him for a whole month from 5 different types of parasites. Trifexis works for dogs 8 weeks and older, with dosing for dogs from 5 pounds to 120 pounds—and beyond!
Dogs 5 to 10 lbs, 140mg. Dogs 10.1 to 20 lbs, 270mg. Dogs 20.1 to 40 lbs, 560mg. Dogs 40.1 to 60 lbs, 810mg. Dogs 60.1 to 120 lbs, 1620mg. Dogs more than 120 lbs, administer the appropriate combination of tablets.

5 - 10 LBS
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10.1 - 20 LBS
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20.1 - 40 LBS
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40.1 - 60 LBS
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60.1 - 120 LBS
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Indication

Trifexis prevents heartworm disease. Trifexis kills fleas and prevents flea infestations, and treats and controls adult hookworm, roundworm and whipworm infections in dogs and puppies 8 weeks and older and 5 pounds or more.

Important Safety Information

The use of ivermectin at higher than FDA-approved doses at the same time as Trifexis can result in serious side effects. Treatment with fewer than three monthly doses after the last exposure to mosquitoes may not provide complete heartworm prevention. Prior to administration of Trifexis, dogs should be tested for existing heartworm infection. Use with caution in breeding females. The safe use of Trifexis in breeding males has not been evaluated. Use with caution in dogs with pre-existing epilepsy. The most common adverse reactions reported are vomiting, decreased activity, itching, decreased appetite, and diarrhea. To ensure heartworm prevention, observe your dog for one hour after administration. If vomiting occurs within an hour of administration, redose with another full dose. Puppies less than 14 weeks of age may experience a higher rate of vomiting. For complete safety information, please see Trifexis product label or ask your veterinarian.
Trifexis Product Label

About Trifexis

Trifexis is a once-a-month, beef-flavored tablet that provides broad protection against a range of parasites. It kills fleas, prevents flea infestations, prevents heartworm disease, and treats and controls adult hookworm, roundworm, and whipworm infections. Protect your dog with convenient parasite protection that lasts all month long.
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4.7
Rated 4.7 out of 5 stars
1159 Ratings

Customers Mention

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

Ease of Use

86% Positive

Effectiveness

87% Positive

Ingredients

86% Positive

Long-Term Benefits

87% Positive

458 Customer Reviews



Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 4 out of 5 stars
By Robin on Nov 20, 2025

Fast shipping

I truly love the fast shipping. I did have a couple of concerns about the website. I changed my vets information, yet you still called the previous vet for the

I truly love the fast shipping. I did have a couple of concerns about the website. I changed my vets information, yet you still called the previous vet for the prescription. Also it was difficult for me to understand how to get the prescription restarted after it expired. I am very happy with Chewy as a whole, but these two problems need to be addressed.


Rated 4 out of 5 stars
By Felicia on Oct 17, 2025

Too Expensive, But my dog is worth it.

$25/pill is ridiculous! Other weight categories of Trifexis on sale, but not this one. I saw someone state in a review it kills ticks. This is inaccurate. Per the

$25/pill is ridiculous! Other weight categories of Trifexis on sale, but not this one. I saw someone state in a review it kills ticks. This is inaccurate. Per the box, it treats fleas, heart worms and other worms. I don’t use pesticides in my back yard because of my dog. He usually gets about 1 tick/year. I found only one Vet locally that dispenses it, but at about $185 for 6 pills. There are only few Vets here that still write the Rx Im told because it doesn’t treat ticks. I thought I could use a tick collar with it, but I was told there is no such thing as a tick only collar and I would overdose my dog with flea medicine if did that. However, I want to say because my dog is 9 y/o, he has been on Trifexis 8 years, and only gets an occasional tick (with no apparent illness) I won’t change him to anything else, including injections. The reason is because on his annual exam fecal testings, he has never tested positive for any worms or parasites. That’s saying a lot because he eats and chews on anything back there, and drinks dirty water from rain drain all of the time. Do I wish i could get it cheaper? Yeah! Do I wish I didn’t have to mail in the Rx? Yeah! But he’s worth the extra expense & trouble for sure! This why I give it 4 stars instead of two.


Rated 1 out of 5 stars
By doug on Nov 11, 2025

Misunderstanding

I had ordered trifectas for both dogs a month earlier when I needed more dog food. When notified about auto- ship I asked to skip this one but order was sent and

I had ordered trifectas for both dogs a month earlier when I needed more dog food. When notified about auto- ship I asked to skip this one but order was sent and charged. Not a very good review by both you and the vet!


Rated 5 out of 5 stars
By Irina on Dec 5, 2025

Easy and Quick delivery

It was very easy submitting the needed medical information for the heartworm treatment and for prescribed food, and I received both quickly.

It was very easy submitting the needed medical information for the heartworm treatment and for prescribed food, and I received both quickly.


Rated 5 out of 5 stars
By Marie on Jan 3, 2026

Trifexis 20.1 - 40 lbs chewable

Our Boston Terrier has been on Trifexis for more than 3 yrs with no side effects or other issues,

Our Boston Terrier has been on Trifexis for more than 3 yrs with no side effects or other issues,


Rated 5 out of 5 stars
By Johanna on Sep 14, 2025

Incredible service. Always.

I accidentally messed up my order.. twice! Third time was the charm. The company didn’t charge me 3x and when I called them on a Sunday, the representative (A REAL

I accidentally messed up my order.. twice! Third time was the charm. The company didn’t charge me 3x and when I called them on a Sunday, the representative (A REAL PERSON, not a robot!) picked up the phone in less than a second and helped me with kindness and respect. I think if Chewy ran the world.. we would have world peace!!


Rated 5 out of 5 stars
By Johanna on Sep 14, 2025

Incredible service. Always.

I accidentally messed up my order.. twice! Third time was the charm. The company didn’t charge me 3x and when I called them on a Sunday, the representative (A REAL

I accidentally messed up my order.. twice! Third time was the charm. The company didn’t charge me 3x and when I called them on a Sunday, the representative (A REAL PERSON, not a robot!) picked up the phone in less than a second and helped me with kindness and respect. I think if Chewy ran the world.. we would have world peace!!


Rated 4 out of 5 stars
By Mary on Oct 17, 2025

Missing stickers in both boxes

I like the product but was disappointed about the missing stickers. This is the first time I have received Triefexis and the box did not contain the stickers I use

I like the product but was disappointed about the missing stickers. This is the first time I have received Triefexis and the box did not contain the stickers I use to track on my calendar


Rated 5 out of 5 stars
By April on Nov 10, 2025

It works and never any issues!

Both of my dogs have been on this medication since they were little and have never had problems with fleas or ticks ever!

Both of my dogs have been on this medication since they were little and have never had problems with fleas or ticks ever!


Rated 5 out of 5 stars
By Maria on Nov 18, 2025

Timing

You all do such a great job. I did not have a RX and you all notified the vet and my pupper got his trifexis filled.

You all do such a great job. I did not have a RX and you all notified the vet and my pupper got his trifexis filled.