Sentinel Spectrum Chew for Dogs, 50.1-100 lbs, (Blue Box)

By Sentinel Spectrum
Rated 4.283 out of 5 stars
Prescription Item

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$155.98Chewy 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.

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 Spectrum 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, beef-flavored chewable.

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

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Total Price: $294.99

ReviewsWrite a Review

Rated 4.283 out of 5 stars
159 Ratings
Would recommend to a friend

147 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 Raul on Nov 13, 2023

Great product at a (somewhat) reasonable price

I have been using this for our 4-year old 90lb mixed breed since he was little. So far, his vet checks have been great and he's never had any fleas (fingers crossed) or worms in this hot South Florida weather. Our previous dogs had minor run-ins with fleas but they were not using Sentinel Spectrum. It's much easier to administer orally than other meds that require application directly on the skin when the dogs are squirming. And he's never had any side effects. Highly recommended.

Rated 1 out of 5 stars
By ilan on Oct 25, 2023

Sentinel spectrum chews have side effects

I gave 1 sentinel spectrum chews to my dog And few days later he has lethargic, weakness and big tumor under belly. My dog developed cancer to this product. Now to sue this product sentinel spectrum chews. I would you should not buy product. This could happen to your dog.

Rated 5 out of 5 stars
By Joyce on Dec 1, 2023

Sentinel Spectrum

My dog has been on sentinel spectrum since she was 3 months old and i will always keep her on it.

Rated 5 out of 5 stars
By Julie on Nov 10, 2023

Very happy with this product

My vet recommended this years ago and 5 years later, still using it and getting negative heart worm test. Thank God!

Rated 5 out of 5 stars
By Stacie on Nov 3, 2023

We have 11 dogs and they have all been on this since they were pups monthly.

11 dogs that is why I order 2 boxes a month bc they each take one a month.

Rated 1 out of 5 stars
By AnnieADK on Jun 7, 2023

VERY upset!

I wrote to this company and am very upset. My dog is ONLY in our yard and supervised, walked in our neighboorhood by me and never gets into anything and cannot be around other dogs. She came down with roundworm after starting this medication 2 months prior and I am super upset! Vet bills and a poor very sick girl who already has health issues! I will not buy again!

Rated 5 out of 5 stars
By Revi on Apr 28, 2023

Sentinel Spectrum - Heartworm Free!

I have been using Sentinel Spectrum chews for over a year now per the recommendation of my veterinarian. I got a prescription through Chewy after my dogs hit 50+ pounds. It's wonderful not having to drive back and forth to the vet all the time just to get heartworm medication. The process of delivery was quick and easy. My Malinois just got her heartworm test yesterday and it came back negative. Her fecal tests have been coming back negative too for parasites. My only complaint is I wish the chews were softer or more appealing to dogs. My girls will usually eat anything but spit these out. We mix it in different foods and they gobble it right down. We will continue to use this product for years to come. :)

Rated 1 out of 5 stars
By Jld on May 27, 2023

Does not prevent hookworms.

This medicine is suppose to prevent hookworms. I put my dog on this medication March 31st, 2023 and gave her another chew 5/1/2023. My dog was diagnosed with hookworms 5/27/2023. My dog also does not like these chews. I must cut into pieces and feed with peanutbutter to get her to eat them.

Rated 5 out of 5 stars
By Mizmoll on Jul 10, 2023

Good price, quick & easy service

I appreciate the fast contact with Mollie's vet to get her Rx. The price is competitive with other online providers and 30-40% cheaper than buying thru the vet.

Rated 5 out of 5 stars
By Karen on Jun 4, 2023

One chew does it all

I've been using this for years on all our dogs and the Battle Buddies foster dogs. Much better to give one chew that they like than to have to give two things and the liquid flea meds burned some of our dogs.