SENTINEL Tablet for Dogs, 26-50 lbs, (Yellow Box), 12 Tablets (12-mos. supply) -

Sentinel Tablet for Dogs, 26-50 lbs, (Yellow Box)

By Sentinel
Rated 4.4853 out of 5 stars
Prescription Item
Pet Weight
Pet Weight

$121.98Chewy Price
This item requires prescription approval.

Medications ship separately. Delivery times may vary.

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

About This Item


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. Sentinel is a monthly oral preventive prescription that guards against heartworms, adult roundworms, adult hookworms, whipworms, and prevents the development of flea eggs. It protects your dog against heartworm disease and intestinal worms, all in a palatable, flavored tablet.

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 Sentinel From Our Team of Experts
Learn More About Sentinel From Our Team of Experts

ReviewsWrite a Review

Rated 4.4853 out of 5 stars
136 Ratings
Would recommend to a friend

136 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 BKelly on Mar 18, 2023

New Believer

I purchased this product for the first time after the product I used for 16 years was discontinued. I'm very cautious about what I give my dogs so I researched before deciding on this product. I had reservations; but after 2 weeks there has been no evidence of side-effects. I'm counting this purchase as a win.

Rated 5 out of 5 stars
By SF on May 2, 2023

My dog loves them!

I had been using Interceptor Plus and Credelio, which worked great but my dog grew to hate the flavor for some reason. He seems to like these, so I'm hoping that lasts!

Rated 5 out of 5 stars
By Kim on May 13, 2023

Very Reliable

I've used Sentinel for the past 18 years on various dogs. I've never had a dog have a bad reaction, and the product does what it's supposed to.

Rated 5 out of 5 stars
By MASMom on Mar 22, 2023

Love Getting Sentinel From Chewy

We have four Miniature American Shepherds and that breed does not do well on all the fancy combo drugs and shots. Simple is best. Grateful Chewy carries Sentinel. Sentinel has been a go to for Aussies and our MAS crew.

Rated 5 out of 5 stars
By RVCarroll1 on May 21, 2023

Great Customer Service

I got what I ordered and it was deL ivered quick, really quick. Chewy contacted my Veterinary and got their approval

Rated 5 out of 5 stars
By Dars on Apr 8, 2023

Sentinel tablets

Since my Josey has allergies we are very careful about what we give her. She has been taking this for years now With no problems.

Rated 4 out of 5 stars
By Vicki on Feb 27, 2023

Too long! My dogs perscrition took to long to get.

It really took longer than usaual to get this. I would it to be filled and gotten to me within a week.

Rated 2 out of 5 stars
By Poppy on Nov 2, 2022

My dog got hookworms while on this!! Twice!!!

My dog has been on Sentinel for about seven months now. I give it to him religiously on the 1st of the month. He has just tested positive for hookworms for the second time in a five month period. Granted, I live in a major city and we're frequently at dog parks and high dog traffic areas but I was still counting on some protection. I'm switching to a different brand.

Rated 5 out of 5 stars
By PuppyParent on Mar 7, 2023


I used this for 12 years with my former dog and it kept hm safe.

Rated 5 out of 5 stars
By SKESS8054 on Nov 3, 2022

This was a great find

This was a great find. The price was the best Ive found. It does exactly what I was looking for it to do