Sentinel Spectrum Chew for Dogs, 2-8 lbs, (Orange Box), 6 Chews (6-mos. supply)
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Most prescriptions are delivered within 3-5 days.About This Item
Details
- Protects against 6 different types of parasites, including tapeworms.
- Unique to SENTINEL brand products, lufenuron stops flea eggs from hatching.1
- Protects against heartworms, tapeworms, hookworms, roundworms, and whipworms.1
- SENTINEL SPECTRUM does all this with convenient and effective once-a-month dosing and a soft beef and bacon-flavor 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
2.3 mg Milbemycin Oxime, 46 mg Lufenuron and 22.8 mg Praziquantel.
Instructions
Sentinel Spectrum should be administered orally, once every month, at the minimum dosage of 0.23 mg/lb (0.5 mg/kg) milbemycin oxime, 4.55 mg/lb (10 mg/kg) lufenuron, and 2.28 mg/lb (5 mg/kg) praziquantel. For heartworm prevention, give once monthly for at least 6 months after exposure to mosquitoes.
The chewables should be administered in a manner that encourages the dog to chew, rather than to swallow without chewing. Chewables may be broken into pieces and fed to dogs that normally swallow treats whole. Care should be taken that the dog consumes the complete dose, and treated animals should be observed a few minutes after administration to ensure that no part of the dose is lost or rejected. If it is suspected that any of the doses have been lost, redosing is recommended.
Heartworm Prevention: Sentinel Spectrum should be administered at monthly intervals beginning within 1 month of the dog’s first seasonal exposure to mosquitoes and continuing until at least 6 months after the dog’s last seasonal exposure. Sentinel Spectrum may be administered year-round without interruption. When switching from another heartworm preventative product to Sentinel Spectrum, the first dose of Sentinel Spectrum should be given within a month of the last dose of the former product.
Flea Treatment & Prevention: Treatment with Sentinel Spectrum may begin at any time of the year, preferably starting one month before fleas become active and continuing monthly through the end of flea season. In areas where fleas are common year-round, monthly treatment with Sentinel Spectrum should continue the entire year without interruption. To minimize the likelihood of flea reinfestation, it is important to treat all animals within a household with an approved flea protection product, as necessary.
Intestinal Nematode & Cestode treatment and control: Dogs may be exposed to and can become infected with roundworms, whipworms, hookworms, and tapeworms throughout the year, regardless of season or climate. Clients should be advised of appropriate measures to prevent reinfection of their dog with intestinal parasites. Because the prepatent period for E. multilocularis may be as short as 26 days, dogs treated at the labeled monthly intervals may become reinfected and shed eggs between treatments.
Store in a dry place at controlled room temperature between 59° - 77°F.
FAQ
Not all heartworm medicines provide the same spectrum of parasite protection. Sentinel Flavor Tabs are chewable tablets that protect dogs against fleas, heartworms, roundworms, hookworms, and whipworms. Sentinel Spectrum is a soft, beef and bacon flavored chew that adds tapeworm protection to offer the broadest coverage available.
Yes. Talk to your veterinarian about the appropriate dose for your pet.
Yes. Both Sentinel Specturm and Sentinel Flavor Tabs offer a size that can be given to small dogs. Sentinel Spectrum has a size available for dogs weighing from 2–8 lbs and Sentinel Flavor Tabs has a size available for dogs weighing from 2–10 lbs.
You may see an occasional “hitchhiker” adult flea that your dog has picked up at the dog park or in the yard or other infested environments where 95% of the flea population lives in the form of eggs, maggot-like larvae, and pupae. Sentinel Specturm and Sentinel Flavor Tabs put an end to fleas before they become adults. You may need an adulticide, such as Effitix Topical Solution for Dogs, to treat occasional adult fleas.
No, both Sentinel Spectrum and Sentinel Flavor Tabs are only approved for use in dogs.

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Customers Mention
Ease of Use
Effectiveness
Ingredients
Long-Term Benefits
105 Customer Reviews
Very Pleased
Our Fur Son ITTY-BITTY only 6 lb (A MORKIE) we started him on Sentinel at his second vet appointment he's been on it ever since and he will be 1 on the 27th of this
Our Fur Son ITTY-BITTY only 6 lb (A MORKIE) we started him on Sentinel at his second vet appointment he's been on it ever since and he will be 1 on the 27th of this month I think Sentinel is awesome it works extremely well although he doesn't go outside at all unless he's unless it's appointments and when he does he's constantly his stroller therefore he doesn't be around dogs so I don't have to worry about the flea part but this does work apparently well against fleas as well he does not like it by itself so we literally always have to crush it up in little pieces to camouflage it with his wet food what they said I definitely recommend this product this will be my second 6 month supply
Heart worm/flea Protection
I used Sentinel for many years on my other dog who was MDR1 positive as many Aussies are. My new puppy is a toy Aussie. He is a little over 4 pounds now so I was
I used Sentinel for many years on my other dog who was MDR1 positive as many Aussies are. My new puppy is a toy Aussie. He is a little over 4 pounds now so I was happy to see that Sentinel comes in a dosage for small dogs. I urge all Aussie owners and Collie owners to have their pets checked for MDR1 and in my opinion to discontinue use of medications designed for multiple uses. To read the ingredients carefully. There have been several deaths which are not made public because of lack of information on the MDR1 Gene.
So far, so good!
I just moved to Florida and was recommended by a veterinarian to give my dog heartworm preventative due to the warmer climate. Well, so far, so good! She's
I just moved to Florida and was recommended by a veterinarian to give my dog heartworm preventative due to the warmer climate. Well, so far, so good! She's only on her first dosage, but she didn't hesitate and ate the pill with a little peanut butter. There was no vomiting afterward, nor have there been any changes in her behavior or negative reactions. What I liked most about this pill is that I didn't read any negative feedback on it while researching options. Some heartworm preventatives seem to have given dogs' seizures or life-threatening ailments. Knowing that information alone had me incredibly nervous to give her any heartworm treatment at all! I hope in the end, this is the brand I come back to for many years to come. From the looks of it, it seems to be a winner! I also liked the price-point. Super affordable!
For years I’ve trusted Sentinel to be safe for my babies
Well, it’s safe and works well for US. I know many pet owners don’t want to give lots of chemicals to their pets. This is the only medication I trust it would help
Well, it’s safe and works well for US. I know many pet owners don’t want to give lots of chemicals to their pets. This is the only medication I trust it would help to avoid heart worm, and aids in repelling fleas & ticks. My doggies love ti go exploring around in my backyard; Sentinel works like my guardian angel. Brings piece of mind since they love to run around in the backyard where lots of deer and other critters often are wandering, close to the house .
Works great!
I can always rely on this product to do its job. My dogs don’t particularly care for chewing the tablet but I can easily break it in half and disguise it by rolling
I can always rely on this product to do its job. My dogs don’t particularly care for chewing the tablet but I can easily break it in half and disguise it by rolling it in a piece of cheese.
Great 4 Weight-loss
The price is reasonable. Was very easy process from getting the prescription sent to Chewy.com from my vet to getting it sent out from Chewy.com. My dogs all kinda
The price is reasonable. Was very easy process from getting the prescription sent to Chewy.com from my vet to getting it sent out from Chewy.com. My dogs all kinda share it. Their poops aren't runny or messy, they dont smell as bad either. We will keep on buying this as it helps keep the weight lowered in my senior, less active furbabies.
Hard to find flea control
My old vet and my new vet no longer carry this product. Both vets tried to steer me to a more expensive flea control. My dogs are sensitive to medications, and since
My old vet and my new vet no longer carry this product. Both vets tried to steer me to a more expensive flea control. My dogs are sensitive to medications, and since this product works, I see no reason to change, especially if it is going to cost me more and possibly cause my dogs to have reactions from a different medication. So glad you carry Sentinel Spectrum!!
Sentinel Spectrum
I have been giving this product to my dogs for years because it works! I highly recommend you try it and your dog(s) will benefit.
I have been giving this product to my dogs for years because it works! I highly recommend you try it and your dog(s) will benefit.
Great product-Customer Service was outstanding!
We were camping out of state for 2 months and couldn’t find his once a month Sentinel Spectrum, thanks to Chewy we were able to have our get our prescription and
We were camping out of state for 2 months and couldn’t find his once a month Sentinel Spectrum, thanks to Chewy we were able to have our get our prescription and their customer service was amazing to work with, best of all, it was much cheaper then, Our local Veterinary. Thanks again!
Good for heartworm prevention
People who are complaining that this doesn’t work on fleas it says so right in the product description. It only works on killing flea eggs, not on adult fleas,
People who are complaining that this doesn’t work on fleas it says so right in the product description. It only works on killing flea eggs, not on adult fleas, you will need something else for that (my vet gave me Vectra for that). The main thing I’m using it for is for heartworm prevention, but it also kills some worms and flea eggs. My dog ate it right down when I fed her her kibble. I cut it into quarters because her kibble is small and I didn’t want her not to eat the sentinel. The first piece she was a little leery of but after a little hesitation she ate it. She had no reaction to it at all which I’m very thankful for.







