Sentinel Flavor Tabs for Dogs
Licensed U.S. Pharmacy | Licensed Pharmacy
Sentinel Flavor Tabs for Dogs

Sentinel Flavor Tabs for Dogs

FREE SHIPPING Over $49! * Pet Food & Other Exclusions
1. Select weight:
2. Select dosage:
Recurring Saings in EprxAUTOSHIP & SAVE[Details]
$6.19Reg $9.99
$30.99Reg $54.99
$59.99Reg $106.99
$6.39Reg $10.99
$31.99Reg $59.99
$61.99Reg $111.99
$7.79Reg $12.99
$38.99Reg $68.99
$75.99Reg $133.99
$63.84Reg $82.99
$124.99Reg $162.99
$10.99Reg $14.99

Related Items

  • 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


Review Summary
64 Reviews
95% (61)
3% (2)
0% (0)
2% (1)
0% (0)
95% Recommend this product (61 of 64 responses)
By Bronte
Enid, ok
Great communication
June 7, 2015
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 Lynne
Great product
September 10, 2019
Great product
By Sheila
Always pleased
September 8, 2019
Have used Sentinel for years with three dogs. Always pleased !
By Pat
Doylestown, OH
Great Product!
September 7, 2019
Have been using for years. Protects for some parasites that other products do not. Their products were not avail able about a 6 years ago for a period of time so I used another product recommend by the vet in the interim. My boy ended up with worms that were hard to treat and he somehow contracted an infection that got into his heart and we lost him. We did a necropsy to find out his cause of death since we had multiple dogs. We will never really know if the worms caused the infection but it will always be suspect since he was so recently treated for the worms. That was the only recent health issue he presented. Now I am adamant about using Sentinel or Interceptor for the most complete parasite protection.
By Cocker M.
Tulsa Oklahoma
Highly Recommend
August 24, 2019
I have been using Sentinel and Interceptor for 20 yrs on 6 dogs (cockers/shelties. The only difference between the 2 is Sentinel has a flea med that stops them from reproducing. Same Heartworm ingredient. No side effects from any of my dogs. My vet highly recommends as the most effective and safest.
ConsNone of my dogs like the chewable flavor but I just disguise it in their food or a piece of bread and they take it fine.
By Helen
Menifee CA
works well for 3 dogs
May 9, 2019
My pets haven't had any issues
ProsConvenient small tablet
By Fern
Very good product and exceptional price
December 28, 2018
The cheapest price anywhere and they contacted my vet quickly. Got my things quickly. I use this product because it prevents flea eggs from hatching and we had a flea problem. My puppy also wont eat the other products for heartworm.
ProsSmall pill
ConsFlavoring got licked off so i finally coated it with peanut butter to get him to take it. Hes a puppy and has teeth issues but he finally took it. The soft type dose didnt work for him.
By Deb
December 15, 2018
Flea free no greasy drops to put on pet
By Donna
Napa, CA
Great product
December 9, 2018
I like Sentinel best because it covers more than just heart worms. I don't have to do something more for fleas.
By Gary
August 9, 2018
Have been using this product for several years. Seems to be very effective.
By Sandy C.
Decatur, Illinois
Payton heart worm
July 21, 2018
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 F.
Panama City, FL
Very economical!
May 24, 2018
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
Great product
May 6, 2018
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
sentinel for 3 pets
March 25, 2018
Easy company to work with, contacted vet and followed thru with order with no problems
Prosgood prices
By CWuebker
Dallas, Tx
Works great, easy to give the dogs
March 8, 2018
Love Sentinel, it works great and the dogs take it with no issues.
By Helen
Aurora, Illinois
Great deal.
January 27, 2018
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 C.
Great prices
January 19, 2018
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.
Great Service!
January 12, 2018
No issue getting prescription from Vet.
ProsFast and Easy.
By Nancy
Richmond, Texas
Sentinel flavor tablets
December 27, 2017
Great price. Arrived as expected.
ProsBest price and arrived as expected.
By Georgetta
Happy with it.
December 19, 2017
My sister told me about this site. Was pleasantly surprised how easy it was to order on here.
By Pam
Great price
December 17, 2017
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
mmmm. delicious
December 16, 2017
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
Great Price
November 22, 2017
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 W.
Houston, Texas
Great price, service and delivery
October 9, 2017
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
Sentinel Flavor Tabs for Dogs 26 - 50 Lbs (6 Mnth)
October 1, 2017
Excellent medication
By Don
Fast delivery, great price!
September 29, 2017
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
Easy to Give - Easy to Remember!!
September 9, 2017
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!