Sentinel Tablet for Dogs, 51-100 lbs, (White Box), 6 Tablets (6-mos. supply)

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$72.99 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$72.99 Chewy Price
($12.17 /ea)

In Stock
FREE delivery
Usually arrives in 3-5 days
Prescription approval made easy
We’ll reach out to your vet clinic.

No interest if paid in full in 6 months on PayPal purchases of $149+. .

Medications ship separately. Delivery times may vary.

About This Item

Details

  • Protects against 5 different kinds of parasites.
  • Unique to SENTINEL brand products, lufenuron prevents flea eggs from hatching.1
  • Protects against heartworms, hookworms, roundworms, and whipworms.1
  • SENTINEL FLAVOR TABS does all this with a once-a-month pork, liver-flavored tablets dogs love.2,3
  • 1SENTINEL SPECTRUM Chews [prescribing information]. Madison, NJ: Merck Animal Health; 2020. 2Data on file. Merck Animal Health. 3SENTINEL SPECTRUM CHEWS [Freedom of Information] NADA #141-333.

Ingredients

Instructions

FAQ

Learn More About Sentinel From Our Team of Experts
4.8
Rated 4.8 out of 5 stars
1970 Ratings

Customers Mention

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

Ease of Use

92% Positive

Effectiveness

89% Positive

Ingredients

90% Positive

Long-Term Benefits

92% Positive

613 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 jack on Dec 15, 2025

The high price of them, that really made me happy!

They arrived in short time and each pill is individually wrapped, what a nice touch. It was so easy picking one out instead of having to pour one out of a bottl

They arrived in short time and each pill is individually wrapped, what a nice touch. It was so easy picking one out instead of having to pour one out of a bottle.


Rated 5 out of 5 stars
By Camela on Jan 11, 2026

Easy use tablets

Baby can'T use other brands due to neurological issues. These work best for her and are less expensive.

Baby can'T use other brands due to neurological issues. These work best for her and are less expensive.


Rated 5 out of 5 stars
By Alice on Dec 3, 2025

Love this product!

Have used SENTINEL for years with multiple dogs. Wouldn't use anything else. Heartworms, fleas, whipworms, roundworms, and hookworms. It's outstanding.

Have used SENTINEL for years with multiple dogs. Wouldn't use anything else. Heartworms, fleas, whipworms, roundworms, and hookworms. It's outstanding.


Rated 5 out of 5 stars
By Leonard on Sep 22, 2025

Replacement

I ordered 2 boxes of these and they were to be delivered the day before I left for the weekend. I should have know there would be problems when the shipper was On-Trac

I ordered 2 boxes of these and they were to be delivered the day before I left for the weekend. I should have know there would be problems when the shipper was On-Trac. They missed the delivery day, then missed an opening the flowing day by noon. The medication spent the weekend sitting out in 100 plus degree temperatures. The person I spoke to sent me a replacement. Great Customer Service!


Rated 5 out of 5 stars
By Davide on Dec 10, 2025

Excellent Product

I I used this product for several years. Easy on the stomach of my two black Labradors. Never had an issue.

I I used this product for several years. Easy on the stomach of my two black Labradors. Never had an issue.


Rated 5 out of 5 stars
By Darlene on Jan 7, 2026

Great for Heartworms

Both my dogs take it once a month. Every vet visit they have no heart worms

Both my dogs take it once a month. Every vet visit they have no heart worms


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

How fast they coordinated with my new vet

Took no time at all and kept my puppies on track with Heartworm meds...Thanks

Took no time at all and kept my puppies on track with Heartworm meds...Thanks


Rated 5 out of 5 stars
By Danette on Aug 28, 2025

Right Product with speedy delivery

Thank you Chewy! I had to change vets to get you back, last rx I had to get thru vet rx service, delivered WRONG med told NO refund or returns. I searched until

Thank you Chewy! I had to change vets to get you back, last rx I had to get thru vet rx service, delivered WRONG med told NO refund or returns. I searched until I found a vet that would work with Chewy to get the right meds. Thank you!!!!


Rated 5 out of 5 stars
By Teresa on Oct 9, 2025

Affordable heart worm control

This kills heart worms, fleas, and all of the intestinal parasites including hook worms and Sentinel doesn’t upset my dog’s tummy!

This kills heart worms, fleas, and all of the intestinal parasites including hook worms and Sentinel doesn’t upset my dog’s tummy!


Rated 3 out of 5 stars
By Connie on Sep 10, 2025

My mistake.

I meant to order the blue box chews, not the white box tablets. I’m just hoping they are basically the same thing, and Luna won’t have any problems.

I meant to order the blue box chews, not the white box tablets. I’m just hoping they are basically the same thing, and Luna won’t have any problems.