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Sentinel For Dogs 51-100 lbs (White)

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Sentinel Heartworm Prevention for Dogs

Sentinel flavored tablets are tasty beef flavored chews for preventing heartworms. They are also used for killing and controlling fleas, roundworms, hookworms, whipworms, and tapeworms. The oral treatment saves the pet from several parasite borne diseases. It can be administered to all breeds of puppies and dogs.

How it works?

A Novartis / Elanco product, Sentinel are flavored tablets for preventing heartworm infection and for treating fleas and gastrointestinal worms. The beef flavored tablets contains Lufenuron, an Insect Development Inhibitor (IDI) that destroys the larval stages of heartworm, fleas and other parasites. It prevents re-infestation by killing the immature life stages of fleas and heartworms.

The powerful treatment remains active for four consecutive weeks. The tasty chews can be administered to puppies and adult dogs and is safe for pregnant female dogs.

Kindly note that as Novartis is now part of Elanco, the manufacturer’s name may differ on the product packs according to the stock availability.

Key Benefits
  • Single treatment for a wide range of parasites.
  • Easy to administer oral treatment for treating fleas and intestinal worms.
  • Prevents heartworm infections.
  • Saves the pet from parasite borne diseases.
  • Lufenuron shows zero toxicity to mammals and thus is very safe to use for all breeds of dogs.

You can start Sentinel treatment once the existing heartworm infection test is negative.

Choose the appropriate Sentinel pack out of four different packs categorized as per the weight of the pet. Refer the Dosage table for details.

Give the beef flavored oral treatment once a month along with the meal. The pet will take these tasty chews as a treat.

If not then break it into pieces and mix with the pet’s food. Make sure the pet finishes the meal to ensure ingestion of full dosage.

Repeat every month, preferably on the same date. Give the tablets to breeding dogs and pregnant females at the time of mating, prior to whelping and then repeat at every month.

Consult a vet for further details and guidance.


Dog weight Dog size Pack color
2-10 lbs Very Small Brown
11-25 lbs Small Green
26-50 lbs Medium Yellow
51-100 lbs Large White
  • Do not administer to pets younger than 8 weeks of age.
  • Consult a vet before starting the treatment. Get your pet tested for an existing heartworm infection. If the test is positive and you still administer Sentinel then there are chances of occurrence of a mild, transient reaction.
  • If the test is negative then it is safe to give Sentinel tablets to the pet.
  • Side effects like vomiting, diarrhea, pruritus, lethargy and depression may occur to sensitive pets. In such cases, it is advisable to contact a vet at the earliest.
  • Consult a vet before and after the treatment.


  • Do not use on dogs younger than 8 weeks of age.
More Info
Target species 8 weeks and older puppies and dogs
Mode of administration Oral
Active Ingredient Milbemycin Oxime, Lufenuron
Manufacturer Novartis / Elanco
Brand Name Sentinel

Customer Reviews

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Sentinel is a great product. It always works as described.
May 03, 2023

Fast shipping

Very quick delivery and product comes in a good condition.
Apr 02, 2023
Patricia Hively

My dogs love it

I have 3 shelties and they eat these without any trouble, no need to disguise them.
Feb 04, 2023

No complaints

Using this for months for my two little terriers and never had any complaints for this product.
Feb 03, 2023

Works Best

Got the best product for my pal. It works wonderful for my little furry friend. Would highly recommned this to every pet parent like me.
Sep 07, 2022

Have A Question?

Is Sentinel just as good as Simparica
Please speak to your veterinarian.
| Apr 03, 2023
(0) | (0)
Do the fleas die ?
Yes, Sentinel for Dogs is indicated for preventing heartworm disease and killing and controlling fleas, roundworms, hookworms, whipworms, and tapeworms.
| Aug 22, 2022
(0) | (0)

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