Sentinel for Dogs

56 customer reviews

Sentinel For Dogs 2-10 lbs (Brown)

You Pay
3 Chews
6 Chews
12 Chews

Sentinel For Dogs 11-25 lbs (Green)

You Pay
3 Chews
6 Chews
12 Chews

Sentinel For dogs 26-50 lbs (Yellow)

You Pay
3 Chews
6 Chews
12 Chews

Sentinel For Dogs 51-100 lbs (White)

You Pay
3 Chews
6 Chews
12 Chews

Sentinel for Dogs - Heartworm, Flea and Worm Treatment

Sentinel flavored tablets for dogs are designed to protect dogs against heartworm disease when given monthly. The oral chew also treats intestinal parasites like roundworms and inhibit flea infestations in dogs. The beef-flavored tablets are highly effective in inhibiting the juvenile stages of heartworms and prevent the fatal disease. It also treats various internal and external parasites including whipworms, hookworms, roundworms and fleas. By eliminating the intermediate stages of the flea life cycle, it prevents flea re-infestations.

Sentinel contains Lufenuron as an active ingredient. Lufenuron, the active ingredient is an Insect Development Inhibitor (IDI), which blocks the reproduction of parasites like fleas and thus reduces the chances of re-infestations. The chew is administered as a single mealtime dose and remains effective for a span of 30 days. Easy to administer, this oral treatment is like a treat for dogs and is safe for 8 weeks and older puppies, dogs and pregnant females.

Please be informed that as Novartis is now part of Elanco, the manufacturer’s name may vary on the product packs according to the stock availability.

Manufacturer Novartis / Elanco
  • One single dose treats and prevents multiple parasitic infections
  • Effective preventive for heartworm infection
  • Kills fleas, flea larvae, roundworms, whipworms and hookworms
  • Oral treatment is given as a single mealtime dose that remains effective for an entire month
  • Active ingredient Lufenuron has no toxicity in mammals so is safe to use
  • Safe for 8 weeks and older puppies, dogs and breeding females.
  • Get your pet checked for an existing heartworm infection. He/She should not be infected at the time of starting Sentinel flavor tablets.
  • Sentinel is available in four different color-coded packs depending on the size and weight of the dog. Weigh your pet and choose the suitable pack.
  • The oral treatment is given after single bedtime meal once a month.
  • Beef flavored tablets are loved by dogs and they take it readily as a treat.
  • Or mix it with the meal and make sure your dog finishes the entire dosage.
  • Repeat every month, if possible then on the same date.
  • Breeding and pregnant females should be given the tablets at mating time, prior to whelping and then every month.


Dog weight

Dog size

Pack color

2-10 lbs

Very Small


11-25 lbs



26-50 lbs



51-100 lbs



  • This is for veterinary use only.
  • Keep out of reach of children and pets.
  • Store it in a cool and dry place.
  • In some cases, adverse reactions like vomiting, diarrhea, depression/lethargy or pruritus have been reported.
  • Contact your veterinarian if any unusual signs develop in your dog after treatment.
  • Milbemycin Oxime
  • Lufenuron
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MsgIcon Customer Reviews (56)
Sentinel for Dogs

Rated 4.9/5 based on 56 ratings

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Pamela McDonald

Much better price than buying at the vet's office or on other websites.

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susan mills
Great company

Love this company affordable prices great service

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Best Protection

This Kills All Cyles Of Parasites And Within 24 Hours Everything Is Gone. I Will Continue Using This Product.

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Stacy Duldulao
Good pricing

Great pricing and I received my order pretty quickly

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Gay Hipsley
5 Star Service Sentinel for Dogs

Very pleased - much faster shipping time than I expected!

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Have A Question?
do i need to send a prescription for sentinel for dogs
| Mar 29, 2022
(17) | (4)
What if my dog is a little over 100 pounds?
For Dogs above 100 Lbs, administer the appropriate combination of chews
| Jan 19, 2022
(17) | (4)
Can this be given to a 10 month old 5 lb dog?
| Aug 20, 2021
(17) | (2)
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