Sentinel Tablet for Dogs, 51-100 lbs, (White Box)

By Sentinel
Rated 4.5732 out of 5 stars
Prescription Item

Pet Weight:

Selected: Pet Weight:

Pet Weight:

Selected: Pet Weight:


Selected: Count:


Selected: Count:

$72.99Chewy 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.

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 protects your pet against heartworms, adult roundworms, adult hookworms, whipworms and prevents the development of flea eggs. Best of all, this medication may also help protect your pal against heartworm disease and intestinal worms, all in a tasty, flavored tablet.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.

See More




Play Video: Learn More About Sentinel From Our Team of Experts
Learn More About Sentinel From Our Team of Experts

Frequently Bought Together

NexGard Chew for Dogs, 60.1-121 lbs, (Red Box), 6 Chews (6-mos. supply)
Rated 4.5986 out of 5 stars
$139.99Chewy Price
Total Price: $280.00

ReviewsWrite a Review

Rated 4.5732 out of 5 stars
246 Ratings
Would recommend to a friend

234 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 3 out of 5 stars
By Jeanne on Nov 8, 2023


Not a problem with the item, but difficult time communicating with staff at Chewy to get this prescription approved, my vet even called Chewy to approve it. Staff insisted that I mail in an original hand written prescription, which my vet does not do, it is computer generated. After 3 days and several calls back and forth from myself and my vet it was finally cleared up and met the approval of Chewy.

Rated 5 out of 5 stars
By Jeff on Nov 16, 2023

Sometimes good sometimes not

This time fine, but very disappointed you’re no longer carrying the Volkman bird seeds I use as well as being out of stock on some Zupreem items I use on my last order. You guys used to be really on top of things , now o must wonder!!

Rated 5 out of 5 stars
By Richard on Nov 7, 2023

Over 9 Years

Sentinel has kept our Abby (goldendoodle) safe and protected for over 9 years. She will be on Sentinel from Chewy for the rest of her life... I hope I have to reorder MANY more times.

Rated 5 out of 5 stars
By JujuB on Sep 2, 2023

Reliable for 25 Years!

I have been using this Sentinel product on all my dogs for 25 years! Seven dogs total (with two currently using) and none have ever tested positive for heartworm disease or parasites & have never had fleas. I used to wrap the table in cheese, but with current two I crush it & mix it in a meal. The best product I have ever used and will continue to use. It is also cost effective which is a plus!

Rated 2 out of 5 stars
By James on Nov 11, 2023

slow delivery

dog food is delivered in 1 or 2 days. pharmacy took a full week. Would have ordered elsewhere if I knew it would take a week.

Rated 5 out of 5 stars
By Lawrence on Nov 17, 2023

Make life simple

These heart warm pills taste great and they protect my Boxers from heart wurm....what else can I say.

Rated 5 out of 5 stars
By JK on Sep 23, 2023

Great rx

I am impressed with Chewy getting the rx from our vet and these to us so promptly. I prefer this heartworm preventative for my dogs.

Rated 5 out of 5 stars
By Lavonne on Nov 25, 2023

Fantastic Heartworm preventative

I have used this product for over 20 years on my dogs with no problems

Rated 5 out of 5 stars
By MrLopez on Aug 29, 2023

One & Done

This is the perfect product to keep your pup healthy have used this for multiple dogs over the years with no problems. Once a month and you have a happy healthy pup.

Rated 1 out of 5 stars
By tiadom on Sep 22, 2023

Not working anymore

They must have changed something its not working on any of my pets. Very expensive to not work. Don't waste your money