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Home > All Pet Supplies > Sentinel


  • Sentinel® is the only oral medication that prevents both heartworm disease and fleas
  • Also provides additional protection against the three most common intestinal worms: roundworms, hookworms and whipworms
  • Breaks the life cycle of fleas at both the egg and larval stages
  • Kills heartworm larvae before clinical signs can occur

This product is available by prescription only.
How to Order Prescription Medications
Prescription Authorization Form (PDF)
Please Note:
*Due to federal and state law, we cannot accept returns on prescription items.
*Revival Animal Health is licensed to sell prescriptions in 40 states. Click here to see the state list.
Sentinel is the only oral medication that prevents both heartworm disease (Dirofilaria immitus) and fleas, with additional protection against the three most common intestinal worms: roundworms (Toxocara canis, Toxoascaris leonina), hookworms (Ancylostoma caninum) and whipworms (Trichuris vulpis). Breaks the life cycle of fleas at both the egg and larval stages, and it also kills heartworm larvae before clinical signs can occur. The concurrent use of an approved adulticide such as Capstar may be needed depending on the severity of the flea infestation.

Brown - 2-10 lbs
Green - 11-25 lbs
Yellow - 26-50 lbs
White - 51-100 lbs
Active ingredients: Milbemycin Oxime and Lufenuron.
Well tolerated at the veterinarian's recommended dosage.

Side Effects:
Side effects are rare, but may include vomiting, lethargy, pruritis, diarrhea, anorexia and more. You may see allergic reactions to the dead fleas. There are no known food or drug interactions, and Sentinel is considered safe in pregnant and lactating animals.
Not for use in puppies under 2 lbs body weight and less than 4 weeks of age.

Test for existing heartworm infection prior to starting a worming prevention program.

Disposal of unused prescription medications:

  1. Revival Animal Health participates in the Take Away Environmental Return System which provides an environmentally safe destruction program.
  2. The preferred method of drug disposal is to return the unwanted product to a pharmacy that participates in the Take Away Environmental Return System. Seek a local pharmacy that participates in this program for safe disposal.
  3. A secondary method of drug disposal is to remove the unwanted medication from any wrappers or containers and place it in a plastic bag with moist coffee grounds or cat litter. This can be disposed of in the regular garbage collection.
  4. Please do NOT dispose of unwanted meds down the drain or toilet, as this may eventually find its way into the human water supply.

Disposal of medical sharps:

  1. When you're finished with the syringe and needle, do not try to recap, remove, bend or break the needle. This is where most injuries occur.
  2. Dispose the syringe and needle immediately in a nearby sharps container. All sharps must be deposited in a puncture-proof container. Make sure your storage location is child and animal proof.
  3. As with all product handling, make sure you wash your hands after handling medical sharps.

Disposal of sharps container:

  1. When your sharps container is half-full, sift dry Portland Cement throughout the sharps. Fill the container with water, and rotate until the cement is mixed and the sharps have been distributed throughout the cement mixture. Let cement dry for 24 hours.
  2. Seal the lid of the container tightly and use duct tape to seal. Label the container "Livestock Sharps" to properly identify the contents.
  3. Dispose of the containers in accordance with your state's regulations.

Our pharmacy hours are Monday-Friday 8:00 a.m. − 4:30 p.m. CST.

Product Reviews
By: Sentinel
From: Oxford,Wi
I have asked my vet numerous times for the wormer she recommended a couple of years ago. She said it was stopped being made. But when I typed in the active ingrediant Sentinel came up. It is such a relief to know this is still being made by someone. The convienance of giving this to adult dogs is unbelievable. It is a VERY GOOD wormer in all respects. Thank You so much for having it to buy. Leetta % Have a Heart
Read more reviews
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For over twenty years, Revival Animal Health has been caring for people who care for pets by delivering quality, reliable products, along with customer service that's committed to your needs. Owners, breeders and shelters count on us because we too love pets, and provide the knowledge, understanding and genuine care it takes to keep them happy and healthy. We feel this is truly what it means to serve you with Pet Care from the Heart®.

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Saturday    8 am - 4 pm CST
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