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
  • 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.

View Sentinel Flavor Tabs Drug Facts Sheet.

  • 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


56 Reviews
95% (53)
4% (2)
0% (0)
2% (1)
0% (0)
95% Recommend this product (53 of 56 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 Gary
August 9, 2018
Have been using this product for several years. Seems to be very effective.
By Sandy C
Decatur, Illinois
July 21, 2018
Payton heart worm
Very happy with this company, Very prompt to respond to my request. They called my vet immediately and got the ok for the prescription. Will definitely use again. Sandy C Decatur, Il
Merchant Response:Sandy, That's high praise and we thank you. We strive to be better every day.
By Joyce Faust
Panama City, FL
May 24, 2018
Very economical!
I have used Sentinel Flavor Tabs for many years on my large dogs and found it to be very effective in preventing fleas and keeping them worm free - with the exception of a tapeworm in a rescue dog before being treated with Sentinel. Entirely Pets Pharmacy has the lowest price I've found.
ProsEffectively prevents flea infestations Effectively prevents most worms My dog loves it
ConsDoes not prevent tapeworm
By J. R.
Easley, SC
May 6, 2018
Great product
I always buy my Sentinel from you, price is better than I can find other places and the free shipping is always nice.
By Sf
April 13, 2018
Great service and prompt delivery.
By carol
virginia beach, va
March 25, 2018
sentinel for 3 pets
Easy company to work with, contacted vet and followed thru with order with no problems
Prosgood prices
By CWuebker
Dallas, Tx
March 8, 2018
Works great, easy to give the dogs
Love Sentinel, it works great and the dogs take it with no issues.
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! :)
Coppell, Tx
January 14, 2018
The entire process was quick, easy, and cost effective.
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 Don
September 29, 2017
Fast delivery, great price!
I received the best price for my purchase of Sentinel. The delivery of the item was fast and accurate.
ProsLow price & fast delivery
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!
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