Sentinel Heartworm For Dogs Reviews-Online Coupon

Sentinel for dogs from Petmeds and World Pets

Sentinel Reviews

Sentinel for dogs from Petmeds and World PetsSENTINEL, also known as PROGRAM PLUS.  This is an oral preventive medicine for dogs that guards against the worms such as heartworms, whipworms, adult round and hookworms.

It also prevents the flea eggs from developing in dogs and puppies that are at least 4 weeks old and weighing more than 2 pounds.

This medication does Not kill adult fleas.  If your pet dog has an existing flea infestation problem, it best you treat that with flea medication such as K9 Advantix II.




Sentinel comes in 4 different strengths, denoted by 4 color tablet form – Brown, Green, White, and Yellow.  The different color targets the weight of the dog.

Where To Buy

We recommend you to buy Sentinel from 2 online stores – World Pet and Pet Meds.

At the time of writing, PetMeds provides the lowest price for Sentinel.  I list down the prices comparison below –

  • PetMed SentinelPetMed Sentinel
  • Dog Weigh 2-10 lbs 6 pack- $38.69 12 pack - $71.98Dog Weigh 2-10 lbs 6 pack- $38.69 12 pack - $71.98
  • Dog Weigh 11-25 lbs 6 pack- $40.49 12 pack - $75.58Dog Weigh 11-25 lbs 6 pack- $40.49 12 pack - $75.58
  • Dog Weigh 26-50 lbs 6 pack- $47.69 12 pack - $89.98Dog Weigh 26-50 lbs 6 pack- $47.69 12 pack - $89.98
  • Dog Weigh 51-100 lbs 6 pack- $56.69 12 pack - $107.98Dog Weigh 51-100 lbs 6 pack- $56.69 12 pack - $107.98
  • Free Shipping on orders over $49.Active ingredient - Nitenpyram
  • Requires a prescription from your veterinarianRequires a prescription from your veterinarian
  • WorldPet SentinelWorldPet Sentinel
  • Dog Weigh 2-10 lbs 6 pack- $64.99 12 pack - $109.99Dog Weigh 2-10 lbs 6 pack- $64.99 12 pack - $109.99
  • Dog Weigh 11-25 lbs 6 pack- $60.99 12 pack - $103.99Dog Weigh 11-25 lbs 6 pack- $60.99 12 pack - $103.99
  • Dog Weigh 26-50 lbs 6 pack- $76.99 12 pack - $118.99Dog Weigh 26-50 lbs 6 pack- $76.99 12 pack - $118.99
  • Not AvailableNot Available
  • Ship only to addresses in USA at a flat rate of $6.95Ship only to addresses in USA at a flat rate of $6.95
  • Did not indicate if the online store requires a prescription.Did not indicate if the online store requires a prescription.

Both the stores provide guarantee and refund.

Online Store With Discount Coupon




Currently, only PetMeds provide the discount code “TOP10” for the lowest price.

Four Tabs Strength

The tabs come in 4 strengths in a pack of 6 and 12 –

  • Brown for extra small dog weighs 2 – 10 lbs
  • Green for small dog weighs 11 – 25 lbs
  • Yellow for large dog weighs 26 – 50 lbs
  • White for extra large dog weighs over 51 lbs

The tablet is administered orally on a monthly basis.

Side Effects

Sentinel contains the active ingredient Lufenuron.  Lufenuron has been tested to be safe for dogs, puppies, breeding males and female, including pregnant females.  Some animals may experience signs of depression, drowsiness, vomiting, itching, hives, loss of appetite, diarrhea, or seizures.

Note – Do not give Sentinel to your pet dogs if they are already taking alternate heartworm medication.