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Sentinel Spectrum Chewables Tablets Dogs Flea Worms Merck, Safe 2023

Sentinel Spectrum

Sentinel Spectrum Chewables Tablets Dogs Flea Worms Merck, Safe 2023

Sentinel Spectrum chewable kill the immature form of the heartworm (Dirofilaria immitis). They also treat and control adult hookworms (Ancylostoma Caninum), roundworms (ascarids – Toxocara Canis and Toxascaris Leonina), whipworms (Trichuris Vulpis), and tapeworms. In addition, Sentinel Spectrum chewable control flea populations by breaking the flea lifecycle in both the egg and larval stages.

  • Protects your dog against heartworm disease and intestinal worms
  • Easy administer tablet also helps control fleas
  • Palatable beef-flavored tablets taste like treats

Free Shipping. Great Low Price. Heartworms + Fleas + Worms Sentinel Spectrum Heartworm + Flea + Worms Merck Safe.Pharmacy|Heartworm Prevention + Protect dog against fleas, heartworm, intestinal worms, including tapeworm, with Sentinel 3-in-1 protection. Sentinel Spectrum is a monthly oral preventive prescription that guards against heartworms, adult roundworms, adult hookworms, whipworms, and prevents the​ .

How It Works

Milbemycin oxime, lufenuron, and praziquantel are the active ingredients in Sentinel Spectrum, which work to control fleas, major intestinal worms, and heartworms. Sentinel Spectrum contains an insect growth regulator (IGR), which kills flea eggs thus preventing them from hatching into adult fleas. Sentinel may be given along with Capstar, which treats flea infestation.


  • Protects against 6 different types of parasites, including tapeworms.
  • Unique to SENTINEL brand products, lufenuron stops flea eggs from hatching.1
  • Also 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
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Shown to be Safe

In a margin of safety study, 40 ten-week-old puppies (10 per group) were administered either a placebo or doses of 1, 3, or 5X the maximum exposure dose of SENTINEL SPECTRUM Chews once every 2 weeks for a total of 7 treatments. All clinical signs resolved within 24 hours.1 SENTINEL SPECTRUM Chews has also been shown to be safe for puppies as young as 6 weeks of age, as demonstrated by a second study.1

Taste Tested

In a field study of 117 dogs, greater than 99% accepted the SENTINEL SPECTRUM CHEWS.1


SENTINEL SPECTRUM Chews are indicated for the prevention of heartworm disease caused by Dirofilaria immitis; for the prevention and control of flea populations (Ctenocephalides felis); and for the treatment and control of adult roundworm (Toxocara Canis, Toxascaris Leonina), adult hookworm (Ancylostoma Caninum), adult whipworm (Trichuris Vulpis), and adult tapeworm (Dipylidium Caninum, Taenia Pisiformis, Echinococcus Multilocularis, and Echinococcus Granulosus) infections in dogs and puppies two pounds of body weight or greater and six weeks of age and older. Available in


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.


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. 


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 the 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.

Side Effects:

Side effects may include vomiting, depression/lethargy, itching, hives, diarrhea, loss of appetite, clogged pores, loss of muscle coordination, rapid and uncontrollable shaking, salivation, and weakness. Notify your veterinarian if side effects appear and remain troublesome. Other side effects may occur, if you notice anything unusual, contact your veterinarian.


Dogs should be tested for adult heartworms and treated if necessary before starting Sentinel Spectrum. This product does not treat adult heartworms and can cause a shock-like reaction in heartworm-positive dogs. Do not use on dogs under 6 weeks of age and weighing under 2 lbs. The safety of Sentinel Spectrum has not been evaluated in nursing females. Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

Allergic reactions to medications may occur. Be sure to inform your veterinarian if your pet has any known drug sensitivities or allergies. If your pet displays symptoms of an allergic reaction, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; vomiting; widespread hives and itching.


Top 5 Antiparasitic and Heartworm Pills for Dogs

Each product has a slightly different spectrum of activity. Here are our top picks for chewable tablets for heartworm prevention. But the choice will vary depending on the risks your dog faces. If in doubt, chat to your vet who can advise which product best meets the dog’s needs.

  1. Nexgard Spectra:  Wins out because of the tick control
  2. Sentinel Spectra: Great for intestinal parasites in addition to heartworm.
  3. Milbemycin: A great broad spectrum dewormer, including for heartworm
  4. Valuheart: Like Heartgard but less expensive
  5. Heartgard: The first choice of many vets

Remember, if fleas and ticks are a problem then there are many flea pills for dogs available too!

Sentinel for Dogs: Reviews!

What do real-life owners who use Sentinel say about the product?

Well, Sentinel is one of those products that people love or hate (but mostly love!)

There are many devoted users who converted to Sentinel from spot-on products. They love the no fuss, no mess way that it’s given. They also love how it doesn’t irritate the dogs’ skin in the same way that some spot-on products do.

Sentinel for dogs also rates highly with owners of long-haired dogs. Again, it comes down to the convenience of an oral product, which is so much easier than hunting for the skin on a wriggly thick-coated dog.

The odd dissatisfied voice feels cheated that Sentinel doesn’t kill adult fleas. However, the product doesn’t claim to do this. Whereas, the savvy user describes Sentinel as a ‘slow burner’ at getting rid of flea infestations but never has a problem when used regularly.

What About a Sentinel Rebate

Did you know you can get rebates on sentinel products? As of 2018, Sentinel will offer a $10 rebate for 6 doses on their Sentinel spectrum chewable tablets and a $25 rebate on 12 doses.

If you’re interested in the Sentinel flavor tabs then worry not! For 6 doses you can receive a $7 rebate and for 12 doses you’ll receive a $20 rebate.

Remember, to qualify for a Sentinel rebate you will have to submit a form completed with both your invoice and coupon code. You can find these forms directly on the Sentinel pet website.

Is Sentinel spectrum better than Sentinel?

Sentinel and Sentinel Spectrum are both effective, safe, top-of-the-line products. Because they are from the same product line, they share many of the same features. … Sentinel can be administered to puppies from an age of 4 weeks, while Sentinel Spectrum is safe for puppies over 2 pounds and 6 weeks of age.

Where can I buy a sentinel spectrum cheap?

The cheapest price for any Sentinel Spectrum product is $38.99 for Sentinel Spectrum Chewable Tablets for Dogs, 2-8 lbs, 6 treatments (Orange Box) at The highest price found is $64.99.

Is Sentinel Spectrum bad for dogs?

The tablets also treat intestinal worms like roundworms, hookworms, and whipworms. It also inhibits flea infestations and keeps dogs safe from fatal diseases. Sentinel is safe for all dog breeds and puppies over 4 weeks of age and weighing above 2lbs.

The Best Heartworm Prevention and Treatment for Dogs

  • Trifexis. …
  • Sentinel. …
  • Sentinel Spectrum. …
  • Revolution. …
  • Advantage Multi. …
  • Iverhart Plus Multi. …
  • Simparica Trio. …
  • Further Reading. No matter where you live, it’s important to discuss heartworm prevention for your dog with your vet.

Which is better Sentinel or Heartgard?

Both products are safe for use in puppies. Heartgard Plus can be used from an age of 6 weeks, while Sentinel is safe from 4 weeks and up. Both products prevent heartworm disease, and they are both effective against roundworms and hookworms.

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Last update on 2024-05-28 / Affiliate links / Images from Amazon Product Advertising API

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