Sentinel for Dogs
Sentinel for Dogs
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At a Glance
Combination of two active ingredients protects dog parasite infestations.
Lufenuron controls flea larvae reproduction.
Milbemycin is heartworm disease preventative & controls intestinal worms.
One chewable tablet per month is administered orally to work for the next 30 days.

Sentinel for Dogs

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At a Glance
Combination of two active ingredients protects dog parasite infestations.
Lufenuron controls flea larvae reproduction.
Milbemycin is heartworm disease preventative & controls intestinal worms.
One chewable tablet per month is administered orally to work for the next 30 days.

Sentinel Logo

Ultimate Guide to Sentinel for Dogs

Meet the Powerful Parasite Preventer: Sentinel for Dogs!

Sentinel for Dogs is the veterinarian-approved dog medication that protects your dogs from various dangerous tiny parasites, internal and external. Sentinel is a monthly, chewable oral tablet that also prevents vicious heartworm disease that is transmitted from mosquito bites. Sentinel ensures that your pup is in their healthiest condition.

How does Sentinel for Dogs work?

Sentinel for Dogs is a medication with two active ingredients (Lufenuron and Milbemycin Oxime).

Lufenuron is an insecticide that distributes into the dog's body fat which the adult flea will eat and pass on to its eggs. As a pesticide and insect growth regulator (IGR), it inhibits the development of chitin which builds a larval flea's exoskeleton. When they hatch, the flea larva dies when its inner organs are exposed to air.

The second active ingredient, milbemycin oxime, is a powerful parasiticide and an anthelmintic, or dewormer. It is 100% effective heartworm disease preventative. It also controls three dangerous intestinal worms (i.e., adult roundworms, hookworms, and whipworms).

Because Sentinel for Dogs is a heartworm disease preventative, make sure every dog is tested by your veterinarian before prevention therapy or using Sentinel.

How is Sentinel for Dogs administered?

Sentinel for Dogs is administered orally once a month and protects your dog for the next 30 days. These beef-flavored chewable tablets can be used as dog treats or, most effectively, eaten with the dog's food. Sentinel is used year-round for maximum prevention effectiveness.

Body Weight Milbemycin Oxime/Lufenuron per Tablet (mg) No. of Tablets
2 - 10 lbs.2.3/46One
11 - 25 lbs.5.75/115One
26 - 50 lbs11.5/230One
51 - 100 lbs.23/260One
What dogs should not be given Sentinel?

Dogs that are below 6 weeks old or weigh less than 2 pounds. Breeding, pregnant, and lactating females have not been evaluated.

What are the potential side effects of which you should be aware?

Test for heartworm disease before deworming therapy or before using Sentinel. Sentinel's most common unfriendly reactions reported are vomiting, diarrhea, itching, decreased appetite, hives, and seizures. Contact your veterinarian if any effects occur.

Frequently Asked Questions
What Is Sentinel for Dogs?

Sentinel protects your dog from internal and external parasites. It is a veterinarian-approved medication. Sentinel tablets are to be administered monthly and come as chewable tablets.

Sentinel tablets also help prevent your dogs from heartworm disease - a disease spread by mosquito bites. Sentinel keeps your dog in a healthy condition.

Is Sentinel Safe for Dogs?

Pet owner reviews suggest the higher levels of trust that they have in this medication. The average rating of the tablets is more than 4.5 out of 5 stars.

Most dog owners prefer Sentinel to treat their pet's heartworm and flea problems over other available medication options.

If your dog is below 6 weeks or its weight is less than 2 pounds, avoid administering Sentinel to it. Also, keep in mind that Sentinel is still due for evaluation with lactating, pregnant, and breeding females.

What Does Sentinel for Dogs Do?

Sentinel protects your dog from internal and external parasites. It is a veterinarian-approved medication. Sentinel tablets are to be administered monthly and come as chewable tablets.

Sentinel tablets also help prevent your dogs from heartworm disease - a disease spread by mosquito bites. Sentinel keeps your dog in a healthy condition.

Who Makes Sentinel for Dogs?

Merck Animal Health makes Sentinel for Dogs.

Does Sentinel for Dogs Kill Ticks?

Sentinel can act as an insect regulator for your dog. The medication effectively controls flea larvae D. immitis.

Sentinel discourages the growth of fleas from flea eggs but is not effective against adult fleas. Sentinel does not kill ticks in your dog. Sentinel can control worms growing inside the body of your dog.

Except for tapeworms, Sentinel can prohibit the growth of roundworms, hookworms, whipworms, and heartworms.

How Does Sentinel for Dogs Work?

Sentinel has two active ingredients, namely Lufenuron and Milbemycin Oxime.

Lufenuron is a pesticide and insect growth regulator or IGR. Once your dog ingests a Sentinel tablet, Lufenuron distributes into your dog's body fat. The adult flea feeds on this body fat and passes it while laying eggs.

IGR inhibits the larval flea's exoskeleton development. The flea larvae die post-hatching from exposure of internal organs to air.

Milbemycin Oxime is a dewormer, an anthelmintic, and a powerful parasiticide.

Sentinel can prohibit the growth of the three dangerous intestinal worms i.e. roundworms, hookworms, and whipworms, because of milbemycin oxime.

Contact your veterinarian for testing your dog before starting administration of Sentinel.

How Is Sentinel for Dogs Administered?

Sentinel is an oral medication. Use of these beef-flavored chewable tablets with food is advised. Veterinarians often advise using Sentinel all year round to give your dog maximum protection.

What Are the Side Effects of Sentinel for Dogs?

Contact your veterinarian for testing your dog before starting administration of Sentinel.

The most common side effects of Sentinel include - seizures, vomiting, itching, hives, diarrhea, and decreased appetite. Contact your dog's veterinarian immediately if any effect occurs.

Can You Break Sentinel Tabs for Dogs?

A tablet that is scored' can be easily divided. These are created by the manufacturer as a sign to mean okay to split'. The split line also helps to break the medicine evenly.

Breaking the medicine in two or crushing the medicines helps to administer them to the pets easily. If the tablet is too large for your dog to chew, breaking it helps them take it easy.

Splitting the Sentinel tablets is not advisable by the manufacturer. Any tablet used to treat flea infestation or kill them should not be split unless your dog's veterinarian suggests doing so.

What Is in the Sentinel Tablets?

Milbemycin Oxime and Lufenuron are both protectors of your dog against internal and external parasites.

What Is the Difference Between Sentinel and Sentinel Spectrum?

Milbemycin Oxime and Lufenuron- are the active ingredients for both Sentinel and Sentinel Spectrum. Along with the treatment of other worms, Sentinel can also treat tapeworms because of the added ingredient - anthelmintic praziquantel.

So a Sentinel Spectrum can treat all kinds of worms, namely tapeworms, hookworms, roundworms, whipworms, and heartworms.

Is There Sentinel for Cats?

Sentinel for Dogs was only made to be administered to dogs, and therefore it is not for cats.

Is Sentinel for Puppies?

Sentinel can be administered to puppies that are at least 6 weeks old and weigh 2 pounds.

How Long Does It Take for Sentinel for Dogs to Work?

Post ingestion, Sentinel starts to work immediately. The dissemination of the medicine in the dog's body fat helps in a fast action against heartworms.

Concluding Thoughts

The most important thing that you should know about Sentinel is its power to protect your dog from tiny parasites and the dangerous heartworm disease, internal and external parasites.

DISCLAIMER: Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427. This informative article is not meant to substitute for the diagnosis, treatment, and professional advice from your veterinarian or other qualified professionals regarding a medical condition.

Sentinel for dogs contains Milbemycin oxime and Lufenuron.

IMPORTANT SAFETY INFORMATION: Dogs should be tested for heartworm prior to use. In a small percentage of treated dogs, digestive, neurologic, and skin side effects may occur. For complete product information refer to the product insert.

Administer Sentinel for dogs orally or crumble into food. A second treatment may be necessary.

*Cats 4 pounds and under: 1/2 tablet as a single dose

*5-11 Lbs: 1 tablet as a single dose

*11 pounds and over: 1 1/2 tablets as a single dose

Store Sentinel for dogs in a cool, dry place.

Medication Guide: Using Sentinel for Dogs - Sentinel Flavor Tabs

Ask your veterinarian or consult with one of our pet care specialists at 1-800-844-1427.

This information is for informational purposes only and is not meant as a substitute for the professional advice of, or diagnosis or treatment by, your veterinarian. Always seek the advice of your veterinarian or other qualified professional with any questions you may have regarding a medical condition. Never disregard or delay seeking professional advice due to what you may have read on our website. Our medications are FDA approved and/or EPA regulated when and as required by law.

Sentinel for Dogs is manufactured by Merck Animal Health
Option UPC/SKU
BROWN,2-10 lbs. 6 Month Supply 716688522115
GREEN,11-25 lbs. 6 Month Supply 716688522214
YELLOW,26-50 lbs. 6 Month Supply 716688522313
WHITE,51-100 lbs. 6 Month Supply 716688522412
BROWN, 2-10lbs. 12 Month Supply 716688621115
GREEN, 11-25lbs. 12 Month Supply 716688621214
YELLOW, 26-50lbs. 12 Month Supply 716688621313
WHITE, 51-100lbs. 12 Month Supply 716688621412

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3. Tell Us About Your Pet and Vet

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4. Thatโ€™s It!

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