Sentinel Flavor Tabs for Dogs
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Sentinel Flavor Tabs for Dogs

Sentinel Flavor Tabs for Dogs

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  • Description
  • Ingredients
  • Directions
  • Reviews


Sentinel® is a preventive for heartworms, adult roundworms, adult hookworms and whipworms for your dog. Sentinel also prevents the development of flea eggs on your pet by breaking the flea life cycle. Sentinel can be taken along with Capstar for a more thorough flea treatment program. Sentinel requires a prescription from a veterinarian in order to be dispensed to your pet.

  • Prevents heartworm disease
  • Controls flea population
  • Controls hookworms
  • Removes and controls roundworms
  • Removes and controls whipworms
  • Beef flavor tablet
  • For dogs only

  • Benefits:
  • Comes in palatable flavored tabs
  • Easy to administer just once a month

  • How it works: Milbemycin oxime eliminates the tissue stage of heartworm larvae and the adult stage of hookworm, roundworm, and whipworm infestations. Lufenuron, the other active ingredient, is an insect development inhibitor that breaks the flea life cycle by inhibiting egg development. Lufenuron prevents most flea eggs from hatching or maturing into adults and thus prevents and controls flea populations by breaking the life cycle.

    Prescription Required


    Sentinel Green for Dogs 11-25 lbs:
    Active Ingredient (per tablet) Amount
    Milbemycin Oxime 5.75 mg
    Lufenuron 115 mg

    Sentinel Yellow for Dogs 26-50 lbs:
    Active Ingredient (per tablet) Amount
    Milbemycin Oxime 11.5 mg
    Lufenuron 230 mg

    Sentinel White for Dogs 51-100 lbs:
    Active Ingredient (per tablet) Amount
    Milbemycin Oxime 23 mg
    Lufenuron 460 mg


    Dosage & Administration: Give Sentinel exactly as directed by the veterinarian. If you do not understand the directions ask your pharmacist or veterinarian to explain them to you. The usual dose of Sentinel for dogs 2 to 10 pounds is 2.3mg/46mg, 11 to 25 pounds is 5.75mg/115mg, 26 to 50 pounds is 11.5mg/230mg and 51 to 100 pounds is 23mg/460mg given once a month year-round. For dogs over 100 pounds give the appropriate combination of tablets. Heartworm testing should be performed prior to the start of prevention therapy. If your pet is off Sentinel for 6 months or less, re-start the medication and test after 6 months since microfilaria, that take 6 months to mature, will result in a positive test result. Store Sentinel at room temperature. Do not remove the tablet from its wrapper until ready to give the medicine. Keep this medication away from children and pets. Consult your veterinarian for pregnant or lactating dogs.

  • Give Sentinel Flavor Tabs once a month on the same day of each month year-round.
  • Sentinel Flavor Tabs is for use in dogs only. Do not give to cats.
  • Watch your dog closely following dosing to be sure the entire dose has been swallowed. If it is not completely swallowed, give one more full recommended dose as soon as possible.

  • Tip: Do not remove Sentinel from its wrapper until ready to give to your pet.
    Pet Weight Dosage
    Dogs/puppies: (4 weeks of age or older) 2-10 lbs Give 1 Flavor Tab every month(Brown Box)
    11-25 lbs Give 1 Flavor Tab every month(Green Box)
      26-50 lbs Give 1 Flavor Tab every month(Yellow Box)
      51-100 lbs Give 1 Flavor Tab every month(White Box)
      Over 100 lbs Give combination of Flavor Tabs based on weight
    Cats: X X
    Horses: X X
    Storage: Should be stored at room temperature between 59


    47 Reviews
    94% (44)
    4% (2)
    0% (0)
    2% (1)
    0% (0)
    94% Recommend this product (44 of 47 responses)
    By Bronte
    Enid, ok
    June 7, 2015
    Great communication
    Highly recommended seller and product! They made sure to stay in contact while waiting for my vet to respond. They were very fast and professional ! The product is great too my dog has been happy and healthy . This is by far the best price including shipping that I was able to find.
    By Helen
    Aurora, Illinois
    January 27, 2018
    Great deal.
    This is same product we purchase at our veterinary clinic, but less expensive. Easy online purchase, and quick delivery in a few days.
    By Connie Charles
    January 19, 2018
    Great prices
    I love this reasonable price on the meds izzie needs. Your staff is always friendly & helpful if I need to talk to anyone. Thank you Connie & Izzie

    Merchant Response:Glad we're able to help! Thank you for sharing this photo of Izzie, she's gorgeous! :)
    By LF
    Coppell, Tx
    January 14, 2018
    The entire process was quick, easy, and cost effective.
    By TD
    January 12, 2018
    Great Service!
    No issue getting prescription from Vet.
    ProsFast and Easy.
    By Nancy
    Richmond, Texas
    December 27, 2017
    Sentinel flavor tablets
    Great price. Arrived as expected.
    ProsBest price and arrived as expected.
    By Georgetta
    December 19, 2017
    Happy with it.
    My sister told me about this site. Was pleasantly surprised how easy it was to order on here.
    By Pam
    December 17, 2017
    Great price
    Have been using this for years. Very effective especially in central TX as well as now in Colorado. Can't beat the price & actually got it for less
    Merchant Response:Hello Pam, So happy to hear the Sentinel works well for you and your fur kids for so long!
    By Myron
    Cape Cod
    December 16, 2017
    mmmm. delicious
    What can you say about these? It's medicine. Actually, not so delicious to my dogs. Both are chihuahua mixes, and neither will eat these when I put them in with their food. I am able to stuff a pill down one dog's throat, but the other won't even allow that and I have to powder it up with the back of a spoon and mix it with a little peanut butter in the bowl. But they don't get heartworms so I guess that's 4 stars.
    By Karen
    Oak Lawn IL
    December 16, 2017
    They take good care of you and the price is great
    Merchant Response:Thank you for the feedback, glad we could be of service :)
    By Nickie
    November 22, 2017
    Great Price
    This was so much cheaper than buying it at my vet. I saved alot and it was so easy to order!
    Merchant Response:Thanks for the feedback Nickie! Glad we could get the Sentinel to you quickly and save you some money in the process!
    By Sarah Williams
    Houston, Texas
    October 9, 2017
    Great price, service and delivery
    First time to order here and was very pleased with the results. They assisted in getting approval from the vet. The product was delivered before the date promised.
    By Mac
    Lewes, DE
    October 1, 2017
    Sentinel Flavor Tabs for Dogs 26 - 50 Lbs (6 Mnth)
    Excellent medication
    By Melissa
    Boston, MA
    September 9, 2017
    Easy to Give - Easy to Remember!!
    This item is phenomenal. I give it to my dog every month on the 20th - I put it in her food and it gets gobbled up.
    Merchant Response:Hello Melissa, thank you for your feedback and we are so happy to hear the Sentinel works well for you and your pup!
    By Sylvia
    Pacifica, ca
    September 3, 2017
    Great customer service
    Vet took time filling order and entirely pets followed up to make it happen!
    By JLL
    August 9, 2017
    Great Product.
    Good Product.
    By bobojohn1
    Bridgeton, MO
    July 29, 2017
    Excellent service and price!
    By Rita
    Burleson, Tx
    July 23, 2017
    Good product
    Given to our fur babies past 12 yrs. Easy to put into their wet food and or given within pill pockets.
    ConsWould be easier if somehow when you have dogs over 100 lbs that there is a pill to be around 125 lbs, 150 lbs. etc. When you have dogs over 100 lbs you have to use 2 different pills to equal their weight.
    By Rita
    Burleson, Tx
    July 23, 2017
    Great product
    Our 2 fur babies have been on Sentinel for 14 yrs. This is the only product that actually works for them.
    ProsEasy pills to give them as treats within the pill pockets and usually we just put into their wet food.
    By Lenny A
    Dallas, Tx
    July 5, 2017
    Heartworm Tabs
    Been using Sentinel for years and Entirely Pets has the best prices by far and the product was shipped within 2 days of ordering. Will use again and would recommend to dog owners.
    ProsGreat prices and quick turn time
    By Martha Luehrmann
    Berkeley, CA
    July 3, 2017
    Sentinel Works for my Dogs
    It keeps the fleas and ticks off and prevents heart worm.
    Proskeeps away fleas and ticks prevents heart worm no need for dangerous and messy powders or collars
    By Frank R. Nelson
    June 22, 2017
    Will buy again
    Great price, fast shipping
    By James
    Seattle, WA
    March 2, 2017
    Name brand medication at a great price
    Not all heartworm meds are safe for Australian shepards so check with your vet first if you have an Aussie. But this is the one my vet recommended for my Mini Aussies and they're both doing great with it.
    By James
    Seattle, WA
    March 2, 2017
    Name brand medication at a great price
    Not all heartworm medications are safe for Australian Shepards so check with your vet first if you have an Aussie. But this one is the one my vet prescribed for both my Mini-Aussies. The older one's been on it for 6+ years, the younger one for 1+ years and both are doing fine.
    By Lynda
    Rockwall Texas
    January 4, 2017
    Good Product-Good Service-Good Price!
    This was the first time my vet would even give me a Rx for an online pharmacy site. I have fumed for years at having to buy only from him at his high prices. I cut my price paid almost in half by buying from I was pleased with their service too and will definitely continue to give them my business.
    ProsSaved lots of money. Good customer service and fast shipping.
    ConsOnly con was that I had a $20. Rebate for the product I bought but it was only valid with a CLINIC receipt so they rejected my rebate form request.
    By FirstBoomer
    Asheville, NC
    December 25, 2016
    Works even for delicate tummys
    Our Greyhound has a 'iffy' stomach when it comes to some of the heartworm tabs. Sentinel works the best. She can take them and still feel fine. And, they work.
    By Deb
    York, PA
    December 9, 2016
    My dog likes these tablets
    Vet recommended. Dog likes the flavor - thinks she's getting a treat so it's easy to get her to take them. I suppose it's working. My dog has been taking them for several years without any issues. Good price from Entirely Pets.
    By Lois Halbert
    Mission Viejo
    October 14, 2016
    Sentinel for our dog
    Good price, fast delivery, but wish there was a way to scan prescription and send rather than having to make a trip to the Post Office to mail.
    ProsGood price for this product
    By harriett
    July 22, 2016
    great price and delivery
    great price and delivery
    By Stephanie Craig Nibert
    June 12, 2016
    My dog still has fleas,not as good as Bravecto.
    doesn't get rid of all fleas