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  • Information
  • Key Benefits
  • Directions for Use
  • Safety
Information

Sentinel Heartworm Prevention for Dogs

Sentinel flavor tablets for dogs is an effective treatment that protects dogs against heartworms, fleas, whipworms, hookworms, and roundworms. This potent product is a broad-spectrum treatment that prevents canines from several internal and external parasites. Orally administered, the tablets are given on a monthly basis to prevent parasite re-infestations and diseases. It is safe for dogs and puppies above 6 weeks.

Sentinel - How it works?

Lufenuron, the active ingredient present in Sentinel inhibits the production of chitin responsible for exoskeleton development in the flea larvae. It prohibits the growth of larvae into adult fleas, thus preventing the multiplication of flea population. The tasty chews are easy to administer and 97% of dogs take it as treat, making treatment a stress free and uncomplicated task.

Kindly Note: Novartis is now acquired by Elanco. So, the manufacturer’s name on product packs may vary according to the available stock.

Ingredients
Milbemycin Oxime and Lufenuron
Key Benefits
Advantages Of Sentinel
  • Single treatment for various internal and external parasites
  • Ideal for heartworm prevention
  • Kills fleas and intestinal parasites
  • Easy to administer beef-flavored tablets
  • Protects dogs from various parasitic diseases
  • Safe for puppies above 6 weeks
Directions for Use

Instructions To Use Sentinel

  • Give flavored tablet directly into the pet’s mouth.
  • You can also crush and mix it with the dog’s food.
  • Check and see that the dog has taken the complete dose
  • In case the dog does not finish the full meal, re-dose immediately with one full tablet.
  • Sentinel should be administered on a monthly basis.
  • Consult a veterinarian before starting Sentinel treatment.
  • Get your pet diagnosed for any such infection.

Package:

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

Safety
Sentinel Safety Measures
  • Safe to use on breeding dogs.
  • Keep away from children and edible items.
  • Wash hands after administering Sentinel tablets.
  • Store tablets in a cool and dry place.
  • Do NOT feed tablets to any other pets other than dogs.
Customer Review
Overall Rating

Star4.6/5

180 reviews
180 reviews
Sort By:
Bella
Complete Cat Care

I like the convenience of managing several aspects of my cat's parasite care with one easy-to-apply treatment.

Nov 03, 2026
Edward
Useful Addition

It's easy to keep this organized with the rest of our pet supplies.

Oct 27, 2026
Hudson
Routine Support

A convenient addition to our regular care plan. It helps keep our pet-care supplies organized.

Oct 20, 2026
Elena
Schedule Friendly

It is easy to remember when I keep it alongside our monthly reminders.

Oct 13, 2026
Tatiana
Schedule Friendly

It is easy to keep track of alongside our monthly reminders.

Sep 30, 2026
Have A Question?
Question:
Q:

Sentinel for dogs has been out of stock for months! What is comparable?

Answer:
A:

Our apologies for the trouble. You may consider using NexGard Spectra or Simparica Trio after consulting your veterinarian.

Nov 05, 2026
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