Sentinel Spectrum Chew for Dogs, 25.1-50 lbs, (Yellow Box)

By Sentinel Spectrum
Rated 4.4865 out of 5 stars
Prescription Item

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$64.99Chewy Price

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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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Total Price: $218.96

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

ReviewsWrite a Review

Rated 4.4865 out of 5 stars
74 Ratings
Would recommend to a friend

74 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 MrsBlanco on Jul 15, 2023

Rx works well

Sentinel Spectrum is a great medication for parasite prevention. My dog has used it every month for the past two years. Always provides a clean bill of health. Getting my Rx from CHEWY is fast, easy, and reasonably priced. They even contact my Vet for me. Customer service is very good.

Rated 5 out of 5 stars
By Carolynn70 on Sep 10, 2023

Good product without any negative reaction

I have used this product on 2 of my last Vizslas and neither had a bad reaction.

Rated 5 out of 5 stars
By Karen on Sep 7, 2023

Good Product

I have been using this product for many years and it works fine! No problems.

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

Easy, accommodating and helpful

As usual, was easy to deal with and very helpful. My vet delayed in updating my dogs file so the prescription was initially denied. was very helpful in taking this negative situation and turning it around so I could get my prescription quickly. I feel I can depend on to follow thru in all my pretty purchases

Rated 5 out of 5 stars
By Lana on Apr 21, 2023

Great product for everything!

I have been using this product for years to prevent fleas, ticks, heartworms and more. It has been working great and I will continue to use it.

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

Great Produt

She likes them. So far no flees. I will mix the tables in her food or give it to her with peanut butter on them.

Rated 5 out of 5 stars
By Scott on Apr 24, 2023

Sentinel Spectrum Chews

Excellent product at a very reasonable price. I buy everything from Chewy.

Rated 2 out of 5 stars
By Poppy on Nov 5, 2022

My dog got hookworms while on this! Twice!!

I've been using this product religiously every 30 days from the moment my pup was 3 months old. It came highly recommended, so much so, that even after the first time he tested positive for hookworms at 8 months I wrote it off to a fluke and kept him on it. Well, 4 months later and he's positive again. I will say that we live in a major city and frequent high dog traffic parks and areas but I'd expect some level of protection. I'm switching to a different brand, this one obviously doesn't work the best with my guy's chemistry. If possible, get your dog tested for parasites regularly, my vet caught it while we went in for something else and I just assumed we were covered by sentinel.

Rated 5 out of 5 stars
By CyFairGuy01 on May 10, 2023

Sentinel Spectrum

Great price, Fast turnaround.

Rated 3 out of 5 stars
By Gemma on Aug 11, 2022

Not user friendly

This is not anything against the products effectiveness! The “chewable” is super hard and apparently doesn’t taste good. When I give it to my 8 month old puppy, she just plays with it and leaves it wherever. Their first time I gave it to her, my other dog ended up eating since it was just laying around. Now, I have to chop it up and mix it in with her food, sometimes I have to keep adding food so she’ll get the whole dose.. It’s not worth the aggravation.