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Sentinel Flavor Tabs for Dogs 11-25 lbs

$50.99

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Prescription Required

Merck Animal Health SKU: 352038-MER Barcode: 716688522214

Size (Count): 6 Tablets
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Sentinel Flavor Tablets for Dogs 11 to 25 lbs, 6 Month Supply

Complete Protection Against Fleas, Heartworms & Intestinal Parasites

Sentinel Flavor Tablets are a trusted, broad-spectrum parasiticide designed specifically for dogs weighing between 11 to 25 lbs. As a monthly oral preventative, Sentinel offers 6-month protection against heartworms, fleas, and a range of intestinal worms, including roundworms, hookworms, and whipworms. This all-in-one chewable tablet uses a beef-flavored formulation to ensure easy administration and high palatability for your canine companion.

Unlike topical treatments or multiple separate medications, Sentinel simplifies parasite protection by combining key active ingredients that disrupt flea life cycles and inhibit the development of heartworm larvae.

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

NOTE: For generic medications, the product image shown may not reflect the actual item received. Generic medications can vary in size, color, and shape between orders depending on the manufacturer. Additionally, your medication may arrive packaged in a HardyPaw Pharmacy vial.

Also Available in Other Weight Ranges

Looking for the right dosage for your dog's weight? Sentinel Flavor Tabs are available in a range of strengths to ensure accurate protection based on size:

Choose the correct strength for complete parasite protection tailored to your dog’s weight.

What Are the Benefits of Sentinel Flavor Tablets for Dogs 11 to 25 lbs?

  • Prevents heartworm disease caused by Dirofilaria immitis
  • Kills flea eggs and larvae, stopping infestations at the source
  • Controls adult hookworms, roundworms, and whipworms
  • Easy-to-administer beef-flavored chewable tablet
  • No greasy topical mess or isolation needed after dosing
  • Long-lasting 6-month supply ensures year-round protection

How Do Sentinel Tablets Work to Protect My Dog?

Sentinel uses a dual active formula:

Active Ingredient

Function

Milbemycin Oxime

Prevents heartworm disease, kills intestinal worms

Lufenuron

Inhibits flea egg development by blocking chitin synthesis

This dual-action mechanism ensures that both internal and external parasites are addressed—making Sentinel a smart choice for comprehensive monthly parasite prevention.

How Should I Administer Sentinel Flavor Tablets to My Dog? (Dosage and Administration)

  • Give one tablet by mouth once a month, preferably on the same day each month.
  • Can be administered with or without food.
  • Ensure your dog chews the tablet thoroughly. If swallowed whole, consider giving food to aid absorption.
  • Always consult your veterinarian for exact dosage instructions depending on your pet's condition.

What Ingredients Are in Sentinel Flavor Tablets?

Each tablet contains:

  • Milbemycin Oxime – 5.75 mg
  • Lufenuron – 115 mg
  • Inactive ingredients: artificial beef flavoring, cellulose, starches, and stabilizers.

Are There Any Side Effects of Sentinel Tablets for Dogs?

While Sentinel is generally well-tolerated, some dogs may experience:

  • Vomiting or diarrhea
  • Lethargy
  • Loss of appetite
  • Mild skin reactions (rare)

Contact your vet if these symptoms persist. Do not use in puppies under 4 weeks old or dogs under 2 lbs.

What Warnings Should I Consider Before Using Sentinel?

  • Sentinel is for use in dogs only. Do not use in cats or other animals.
  • Do not use if your dog has a history of seizures unless approved by a veterinarian.
  • Ensure your dog is heartworm-negative prior to starting treatment.
  • Store tablets at room temperature and away from moisture or direct light.

How Is Sentinel Different from Competitor Brands Like Trifexis or NexGard Spectra?

Feature

Sentinel

Trifexis

NexGard Spectra

Heartworm Prevention

Intestinal Worm Control

Flea Control

Targets eggs & larvae

Kills adult fleas

Kills adult fleas

Safe for Puppies (over 4 weeks)

❌ (8 weeks)

❌ (8 weeks)

Vomiting Risk

Low

Medium

Medium

Sentinel stands out by interrupting the flea life cycle at its source while maintaining a strong safety profile for younger or smaller dogs.

Shipping & Returns

Shipping Policy: HardyPaw offer all types of shipping options (Ground, Express, Priority, International) depending on the urgency of the product requirements. To know about our shipping policy in detail, click here.

Refund policy: If you face any issue with our product and want to return it, read our refund policy carefully.

Sentinel for Dogs FAQs

What is Sentinel used for in dogs?

Sentinel is used to prevent heartworm disease, control flea infestations by stopping flea egg development, and eliminate intestinal parasites like roundworms, hookworms, and whipworms.

Can Sentinel be used alongside other flea treatments?

Yes, Sentinel can be safely combined with adult flea killers like Capstar if immediate flea killing is needed, but always consult your vet first.

Is Sentinel safe for puppies?

Sentinel is safe for puppies over 4 weeks of age and weighing at least 2 lbs. Always follow veterinary guidance for dosing.

 Does Sentinel kill adult fleas?

No, Sentinel does not kill adult fleas. It prevents the development of flea eggs and larvae, helping stop infestations from recurring.

What happens if I miss a dose of Sentinel?

If a dose is missed, administer as soon as possible and resume monthly dosing. If more than 30 days pass, consult your vet and consider re-testing for heartworms.

Trusted Medical Resources for Further Reading

  1. American Heartworm Society – Heartworm Lifecycle
  2. Drugs.com – Milbemycin Oxime + Lufenuron
  3. FDA Sentinel Approval Information

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