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


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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.
Specifications
Item Number | 146446 |
---|---|
Common Brand Name(s) | Sentinel Spectrum |
For Use With | Dogs |
Generic Name | Milbemycin Oxime, Lufenuron, Praziquantel |
Administration Form | Oral |
Breed Size | Medium Breeds, Large Breeds |
Product Form | Chew |
Strength | 23 mg Milbemycin Oxime, 460 mg Lufenuron and 228 mg Praziquantel |
Health Condition | Heartworms, Hookworms, Roundworms, Whipworms, Tapeworms, Fleas |
Drug Type | Parasiticide |
Uses
Sentinel Spectrum is indicated for the prevention of heartworm disease. It is also formulated to help prevent and control flea populations, and for the treatment and control of adult roundworm, hookworm, whipworm, and tapeworm infections in dogs and puppies six weeks of age and older and weighing at least two pounds.
Possible Side Effects
The following adverse reactions have been reported in dogs after administration of milbemycin oxime, lufenuron, or praziquantel: vomiting, depression/lethargy, pruritus, urticaria, diarrhea, anorexia, skin congestion, ataxia, convulsions, salivation, and weakness.
Drug & Food Interactions
There are no known contraindications to the use of Sentinel Spectrum.
Precautions
Treatment with fewer than 6 monthly doses after the last exposure to mosquitoes may not provide complete heartworm prevention. Prior to administration of Sentinel Spectrum, dogs should be tested for existing heartworm infections. At the discretion of the veterinarian, infected dogs should be treated to remove adult heartworms. This medication is not effective against adult D. immitis. Mild, transient hypersensitivity reactions, such as labored breathing, vomiting, hypersalivation, and lethargy, have been noted in some dogs treated with milbemycin oxime carrying a high number of circulating microfilariae. These reactions are presumably caused by release of protein from dead or dying microfilariae. Do not use in puppies less than six weeks of age. Do not use in dogs or puppies less than two pounds of body weight. The safety of this medication has not been evaluated in dogs used for breeding or in lactating females. Studies have been performed with milbemycin oxime and lufenuron alone. Not for use in humans. Keep this and all drugs out of the reach of children.
Ingredients
23 mg Milbemycin Oxime, 460 mg Lufenuron and 228 mg Praziquantel.
Recommended Dosage
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,ngive once monthly for at least 6 months after exposure to mosquitoes.
Storage Instructions
Store in a dry place at controlled room temperature between 59° - 77°F.
How are Sentinel Spectrum and Sentinel Flavor Tabs different from other heartworm medications?
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.
My dog weighs more than 100 pounds. Are Sentinel Specturm or Sentinel Flavor Tabs a good option for him?
Yes. Talk to your veterinarian about the appropriate dose for your pet.
My dog is a toy breed. Are Sentinel Specturm or Sentinel Flavor Tabs okay for his small size?
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.
I see a few fleas on my dog. Is the medication working?
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.
Can I give either Sentinel Spectrum or Sentinel Flavor Tabs to my cat?
No, both Sentinel Spectrum and Sentinel Flavor Tabs are only approved for use in dogs.

Dosage Chart
Color on Box | Weight Range | Strength | Dosage | Product Page |
---|---|---|---|---|
Orange | 2-8 lbs | 2.3 mg Milbemycin Oxime, 46 mg Lufenuron & 22.8 mg Praziquantel | Administer orally once a month | ✓-Click Here |
Green | 8.1-25 lbs | 5.75 mg Milbemycin Oxime, 115 mg Lufenuron & 57 mg Praziquantel | Administer orally once a month | ✓-Click Here |
Yellow | 25.1-50 lbs | 11.5 mg Milbemycin Oxime, 230 mg Lufenuron & 114 mg Praziquantel | Administer orally once a month | ✓-Click Here |
Blue | 50.1-100 lbs | 23 mg Milbemycin Oxime, 460 mg Lufenuron & 228 mg Praziquantel | Administer orally once a month | ✓-Click Here |
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ReviewsWrite a Review
113 Customer Reviews
Flea infestation while on this medication
I give this medication on time every month. My dogs both still developed a flea infestation. I'm having to supplement with a topical medication to kill the fleas and bug bomb my home. I will be switching them off of this medication.
SENTINEL SPECTRUM
Disappointed about the huge price increase! Also disappointed that you no longer can fill my order for the Rachael Ray Nutrish Meatloaf Morsels Homestyle Beef Recipe Dog Treats, 12-oz bag. Why would you no longer carry this!?!?!?
Works well
The chew seems to be new. Before this product was in tablet form.I thought the tablet was what i was getting. My dog has a very soft mouth & cannot chew this unless I cut it into pieces. So it is not real chewy. Sort of hard. But if your dog is a powerful chewer, this will work fine.
Necessary Evil
I firmly believe that we need to do what's necessary to protect our loved pets from the dangers of heartworms and other parasites. I think Sentinel Spectrum chews are a great way of doing that. My only complaint is their taste. Apparently, it's not good... my dog won't eat them unless I chop the chew into about 8 pieces and roll them in gravy or peanut butter. Hopefully, they'll produce a better, more desirable chew in the future!
Worm pills
These pills are at a fair price. Vets over charge.
Effective and easy!
I have used both this and the regular Sentinel chews for my dog for ~2 years. He roams our farm and goes everywhere with me and has always had negative heartworm/fecal tests since using these! He literally takes them like a treat, I’ve never had issues with palatability. Also very affordable compared to other brands. I am a vet tech and can get other brands of prevention for free but I still choose to pay for this one, hands down.
Love what it does, dog hates it
I’ve always combined sentinel with bravecto since working at a vet clinic and it’s always been the best combination, but my dog refuses to eat both of them and I swear he can sniff these chews out in ANYTHING. Won’t sniff out the five medications he’s on in pill pockets or wet food, meat, etc but he’s a sleuth with these. Wish they were more appealing but I can understand it is a medication so you can only do so much. Took one star just for the monthly battle of blehing the chew in the floor and the struggle to pill a 100 pound dog that follows.
Monthly care
I have used Sentinel on both of my labs. Our first lab Max used it for 14 years, and my current lab Blue for the last 5 years. They have been flea and heart worm free! I love the auto ship convenience, I never have to worry about Blue missing his monthly treatment!!
Best out there
When I got my first rescue, the humane society gave me a free vet visit where I got one of the Chews from for the first time. It has not been a year since I got Gunter. Because of the chews Gunter is heart worm free and has never gotten fleas. Now with my newest rescue, Moose, I also give him these. I 100% back this company.
Sentinel Spectrum
I used Sentinel Spectrum for many years for my previous dogs. There re others in the form of a chew, but my dogs could always detect the scent and spit them out. This is the only product they would willing take. When I got my new pup, it made sense to put her on the same regimen. My vet hospital does not stock this product, but it is available on Chewy and other websites. I love Chewy's customer service! I called me vet who mentioned them as an option. After I place the order, they did the rest and got it to me well ahead of when the next dose it needed. Thanks Chewy!