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

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$76.99 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$76.99 Chewy Price
($12.84 /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
2062 Ratings

Customers Mention

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

Ease of Use

92% Positive

Effectiveness

90% Positive

Ingredients

90% Positive

Long-Term Benefits

92% Positive

639 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 Hilaire on Mar 7, 2026

Quality product; good price

We have been giving our dog Sentinel for 4 years now. It’s a high quality preventative treatment that protects dogs from heart worms as well as fleas, hookworms,

We have been giving our dog Sentinel for 4 years now. It’s a high quality preventative treatment that protects dogs from heart worms as well as fleas, hookworms, roundworms and whip worms. It has been very effective.,


Rated 5 out of 5 stars
By Jessica on Feb 4, 2026

Easy Process to get prescription

Since we have our dogs and vet information set up already, it's easy to get things renewed and orderdd online. I love that they reach out to the vet to confirm all

Since we have our dogs and vet information set up already, it's easy to get things renewed and orderdd online. I love that they reach out to the vet to confirm all things are in order for the prescription to be filled. And it came faster than expected. We always do appreciate Chewy!


Rated 5 out of 5 stars
By Betty on Mar 30, 2026

Sentinel

The customer service representative was quite helpful with my order since I had never asked for prescription medicine before I needed help.

The customer service representative was quite helpful with my order since I had never asked for prescription medicine before I needed help.


Rated 5 out of 5 stars
By Brittney on Mar 21, 2026

Price

This product is a whole lot cheaper than others but it works really well. My dog has been on it for 2 years now and we've had no issues

This product is a whole lot cheaper than others but it works really well. My dog has been on it for 2 years now and we've had no issues


Rated 5 out of 5 stars
By Ellen on Mar 9, 2026

The Cost and the East

I feel your company has made it easier for me to take care of my 2 babies. I love that you have the items my vet recommends. Thank you.

I feel your company has made it easier for me to take care of my 2 babies. I love that you have the items my vet recommends. Thank you.


Rated 5 out of 5 stars
By Rodney on Feb 21, 2026

Pharmacy Staff

They were very patient, courteous and helpful in working our any problems with my order for Brooklyn, PTSD Service-dog

They were very patient, courteous and helpful in working our any problems with my order for Brooklyn, PTSD Service-dog


Rated 5 out of 5 stars
By cindy on Mar 11, 2026

Quick service.

The shipping was quick. The product arrived in good shape. I was pleased with my purchase.

The shipping was quick. The product arrived in good shape. I was pleased with my purchase.


Rated 1 out of 5 stars
By Cheryl on Mar 7, 2026

Horrible

Never received it. Fed ex delivered it to wrong house and no one ever made it good

Never received it. Fed ex delivered it to wrong house and no one ever made it good


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 3 out of 5 stars
By Jaskamal on Feb 5, 2026

Partial order

Sent partial prescription - missed the prescription for a sentinel yellow box for a 40lb dog.

Sent partial prescription - missed the prescription for a sentinel yellow box for a 40lb dog.