hero banner

hero banner mobile

Sentinel Rx

By Sentinel
Weight and Color:
Month Supply:

Sorry, there is a back order on this item

You may also like

One-time purchase $21.53 - $297.70
One-time purchase $71.99 - $76.99
One-time purchase My Price $9.98
Sentinel Description

Sentinel flavor tabs are administered monthly to prevent heartworm disease, control and prevent fleas, control adult hookworm, and control and remove adult roundworm and whipworm. It is appropriate for puppies and dogs aged four weeks or older and weighing 2 lbs or higher. See the Allivet Heartworm Comparison chart to find which heartworm prevention is best for your pet.

Sentinel heartworm prevention kills any immature heartworms your dogs may have been exposed to during the preceding month. It also treats intestinal infections of adult roundworms and hookworms. It does not kill adult fleas but does keep flea eggs from maturing to adulthood.

Formulated with a flavorful taste that most dogs like, Sentinel flavor tabs can be given as a treat and most dogs will easily accept the active ingredients. However, you can also offer them with food in the same way you would other tablets or pills. Whenever you administer Sentinel flavor tabs, your dog should also eat a full meal. Closely watch your dog to be sure they consume the entire dose. If they do not consume all of the dosage, give them another full recommended dose as soon as you can. Sentinel heartworm prevention should always be given with or immediately after a full meal to make sure it is fully absorbed by your dog and provide maximum protection.

What is Sentinel?
Sentinel (milbemycin oxime/lufenuron) Flavor Tabs are chewable tablets manufactured by Merck that control flea populations and adult hookworms, and remove and control adult roundworm and whipworm infections in dogs and puppies. In addition Sentinel helps prevent heartworms.
Which animals/pets is Sentinel for?
For puppies and dogs ages 4 weeks and up, with a bodyweight of 2 lbs or greater. Sentinel is not safe to use in cats. Never give dog medications to cats and never give large dog tablets to small dogs. Some dog medications contain ingredients that are toxic to cats.
Sentinel uses
Sentinel is an oral monthly tablet with a savory beef flavor. It:
  • Protects against many types of infections and infestations
  • Controls existing flea infestations
  • Prevents and treats heartworms
  • Controls and treats roundworms and whipworms
What does Sentinel do?
  • Lufenuron and milbemycin oxime eradicate infestation of worms and control fleas
  • Milbemycin oxime, a macrocylic anthelmintic, is believed to interfere with invertebrate neurotransmission
  • Milbemycin oxime is known to eliminate heartworm larvae in the tissue stage, along with roundworm (Toxascaris leonina and Toxocara canis), whipworm (Trichuris vulpis), and hookworm (Ancyclostoma caninum) when the recommended dosage schedule is followed
  • Lufenuron is shown to controlfleas by preventing flea eggs from developing, but it does not kill fleas in the adult stage. An adulticide may be used concurrently to control adult fleas adequately.
Sentinel side effects

The following side effects have been reported:

  • Diarrhea
  • Vomiting
  • Loss of appetite
  • Depression
  • Lethargy
  • Staggering
  • Drooling
  • Seizures

Sentinel® does not have any known reaction with other drugs at this time.

Studies have indicated that collies, sheepdogs, and other herding dog breeds that have a genetic mutation known as MDR1 may be more sensitive to elevated levels of milbemycin and more likely to have serious adverse reactions including coma and death. These adverse reactions are associated with high quantities of milbemycin. Discuss any concerns you have with your veterinarian. Some forms of milbemycin that contain pork extracts for flavor may cause a food allergy in some pets.

Your pet should be tested for heartworms before using Sentinel heartworm preventive, as pets with high levels of heartworms in their system sometimes react to milbemycin. Discuss the use of Sentinel for pregnant or lactating dogs with your veterinarian.

Sentinel ingredients
Milbemycin Oxime - Lufenuron
Sentinel overdose: What to do?
Contact your closest emergency pet hospital.
What to know before using Sentinel
  • Sentinel should not be given to puppies under 4 weeks old or under 2 pounds.
  • Your dog should be tested for heartworms prior to taking Sentinel.
How is Sentinel sold?
Sentinel is sold in four tablet sizes in color-coded packages for oral administration to dogs and puppies according to their weight (see How to Use). Each tablet is formulated to provide a minimum of 0.23 mg/pound (0.5 mg/kg) of milbemycin oxime and 4.55 mg/pound (10 mg/kg) body weight of lufenuron.
Manufacturer
Merck Animal Health
Tips for using Sentinel


Pharmacists are standing by to offer Pet Parent counseling regarding prescription medication purchased from Allivet before and after dispensing. Pharmacists on duty are available Monday-Friday, 9:30AM - 5:30PM EST and will be on call Saturday 12:00PM - 4:00PM EST for consultation.

Before starting Sentinel flavor tabs, speak with your veterinarian about any other drugs your dog is taking, including vitamins and supplements. In addition, notify your veterinarian of any allergies or reactions they may have had to other medications. They will be able to answer all your questions about how Sentinel works, any possible adverse reactions, and any side effects to watch out for.

Intestinal parasites like roundworms and hookworms can be spread from pets to people. Discuss with your veterinarian additional measures you can take to help keep your pet from picking up intestinal worms, and how to protect your family and yourself.

Overview

To ensure adequate absorption, always administer SENTINEL FLAVOR TABS to dogs immediately after or in conjunction with a normal meal.

SENTINEL FLAVOR TABS have no effect on adult fleas, but control flea population by breaking the flea cycle at the egg stage. 

Treatment may begin at any time of the year. In geographic areas where fleas and mosquitos are seasonal, treatment should begin several weeks prior to the expected onset and should continue until the end of the flea and mosquito season. In areas with year-round infestations, treatment should continue the entire year without interruption.

It is important to treat all dogs in the household for fleas. Cats in the same household should be treated with approved products like lufenuron. 

SENTINEL FLAVOR TABS must be administered monthly, preferably on the same date each month. 

If you have any questions concerning the use of this product contact your veterinarian, who is your pet's healthcare expert. 

For technical assistance call 1-800-224-5318. SentinelPet.com  

Dosage :
Weigh your dog prior to administration to ensure proper dosage. Do not administer to dogs under 2 pounds or less than 4 weeks of age. Administer with a normal meal.

Recommended Dosage Schedule: 
Dog’s Weight  /  Milbemycin Oxime Per Tablet  /  Lufenuron Per Tablet
2 to 10 lbs.    /                  2.3 mg                   /                46 mg
11 to 25 lbs. /                   5.75 mg                 /               115 mg
26 to 50 lbs. /                  11.5 mg                 /                230 mg
51 to 100 lbs. /                23 mg                   /                 460 mg
 
For dogs over 100 pounds give the appropriate combination of tablets.
Main Ingredients
The active ingredients present in Sentinel Flavor Tabs are milbemycin oxime and lufenuron.