Sentinel Tablet for Dogs, 11-25 lbs, (Green Box)

By Sentinel
Rated 4.3934 out of 5 stars
Prescription Item

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$101.98Chewy Price

In Stock
FREE delivery
Usually arrives in 3-5 days
We'll collect your pet's prescription information at Checkout.

This item requires prescription approval.

Medications ship separately. Delivery times may vary.

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Spend $100, Get $30 eGift Card with code: FALL

Total Price: $303.16

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 4.3934 out of 5 stars
211 Ratings
Would recommend to a friend

208 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 1 out of 5 stars
By Andi on Aug 16, 2023

Stay clear- fur loss

Usually we use plain Intercepter but with all the moisture where we live I decided to try Sentinel in case of a flea outbreak. Our dog has been acting strange, bloody diarrhea and even fur loss since giving Sentinel. I would never recommend this product and am frustrated with Chewys lack of support regarding the issue. I reached out to them and I was told they were sending a message to the dept that handles prescription issues and that is where the ball seems to have been dropped.

Rated 1 out of 5 stars
By MG on Jun 1, 2023

Hate the side affects

My dachshunds lost so much hair over time. My old vet and I tried a bunch of different things. Family members were noticing that my dachshunds were almost bald on belly, head, butt, and chest while my family member's dachshunds had normal hair. Even checking with the family that has the parents of my pups, their dogs all had normal dachshund hair and never any hair loss. Then I started taking my pups to a new vet and she stated that the hair loss/thinning is probably from Sentinel. She switched us to a different medicine & within 2 months they are back to having hair and continually getting better and better. I feel so bad because I had been using Sentinel for years and causing my pups to be hairless. I have used a different medicine for 6 months now and it is a night and day difference for my pups hair.

Rated 5 out of 5 stars
By Jem on Jul 12, 2023

Satisfied customer

My 4 year old Dachshund/Mini pincher/chihuahua mix has been taking Sentinel for the last 3 years with no issues. Never had worms or fleas. He doesn’t like the taste of the pill, so I crush it and put it in his soft food since it is to be taken with food anyway.

Rated 5 out of 5 stars
By Pink13Rose on Jun 22, 2023

Great service!!!

I have been using Sentinel for my dogs for many years, and it works just as the company says it will. No problems at all. And Chewy is a remarkable pet supplies company! They are quick to correct any problems and are also very caring. I highly recommend!!!

Rated 5 out of 5 stars
By Babe on Sep 5, 2023

Sentinel is the Best

I have used the easy digestible tablets to prevent fleas and heartworms for over 20 years for my dogs.

Rated 5 out of 5 stars
By Dale on Jul 5, 2023

Chewy Is The Best

I’ve been a customer of Chewy’s for many years. The are the best company I’ve ever had the pleasure of doing business with.

Rated 1 out of 5 stars
By Sandy on Jul 27, 2023


Sentinel would no give me a rebate on a 1 year supply because Chew is ineligible online retailer !

Rated 5 out of 5 stars
By Jan on Jun 22, 2023


We received our Sentinal flee medicine on time. Very fast. Prices are lot cheaper going through Chewy then going through my vet.

Rated 5 out of 5 stars
By Memare77 on Aug 16, 2023

Wonderful service

Always receive excellent service and my dog loves their products.

Rated 5 out of 5 stars
By Tami on Apr 27, 2023

Very Pleased

I recently made my first purchase and was very pleased. Service was very efficient and quick. You even had to contact my pets Veterinarians office and it was still quick. Thank you!