Trifexis Chewable Tablet for Dogs, 5-10 lbs, (Magenta Box), 12 Chewable Tablets (12-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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4.8
Rated 4.8 out of 5 stars
676 Ratings

Customers Mention

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

Ease of Use

91% Positive

Effectiveness

92% Positive

Ingredients

91% Positive

Long-Term Benefits

95% Positive

269 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 Carole on Oct 30, 2025

Effectiveness of the product.

This product has been very effective keeping my little dog free from fleas and preventing heart worm. She is a healthy 16 year old girl who has taken the product

This product has been very effective keeping my little dog free from fleas and preventing heart worm. She is a healthy 16 year old girl who has taken the product most all of her li


Rated 5 out of 5 stars
By James on Jan 14, 2026

The quick and accurate response. Chewy took of everything.

The prescription had to be renewed and modified. Chewy took care of everything.

The prescription had to be renewed and modified. Chewy took care of everything.


Rated 5 out of 5 stars
By Cecilia on Dec 15, 2025

Only thing i use

Have tried others but come back to this one because it's the only one that works for my baby

Have tried others but come back to this one because it's the only one that works for my baby


Rated 5 out of 5 stars
By Debra on Nov 20, 2025

Awesome flea protection

We've been using this product for about 20 years on all our pets we've had it works

We've been using this product for about 20 years on all our pets we've had it works


Rated 5 out of 5 stars
By Diane on Nov 3, 2025

Fast service

This is why I don’t do reviews! One can’t just say the service was good or bad. You want too much detail

This is why I don’t do reviews! One can’t just say the service was good or bad. You want too much detail


Rated 5 out of 5 stars
By Lottie on Oct 4, 2025

Fast delivery

This is the first time I’m giving it to Sadie , so far she hasn’t had any side effects from the pill ,so I’m happy about that

This is the first time I’m giving it to Sadie , so far she hasn’t had any side effects from the pill ,so I’m happy about that


Rated 5 out of 5 stars
By Robbie on Sep 15, 2025

Orders

Thank you for prompt and friendly service. Mr Brit has passed at age 17. This is the reason for cancellations. I will remain a customer, thank you

Thank you for prompt and friendly service. Mr Brit has passed at age 17. This is the reason for cancellations. I will remain a customer, thank you


Rated 5 out of 5 stars
By Barbara on Oct 4, 2025

Chewy has always delivered in time for next treatment & worked with my Vet,

Wednesday, October 1, 2025, Luci Lu & I lost our battle with Cushing's. She crossed the bridge. I am lost beyond words!

Wednesday, October 1, 2025, Luci Lu & I lost our battle with Cushing's. She crossed the bridge. I am lost beyond words!


Rated 5 out of 5 stars
By Rhonda on Nov 21, 2025

Ordering was a easy process!!

Loving i can order Trefexis at a good price and this item works!!!

Loving i can order Trefexis at a good price and this item works!!!


Rated 5 out of 5 stars
By Fabienne on Jun 29, 2025

Great Customer Service

Package said delivered but never received. Customer Service promptly assured I would receive a replacement. Hours later a neighbor from 4 doors away brought the

Package said delivered but never received. Customer Service promptly assured I would receive a replacement. Hours later a neighbor from 4 doors away brought the package. Called immediately Chewy to let them know and to cancel the replacement. Once again great customer service - thank you.