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Tri-Heart Plus for Dogs

Tri-Heart Plus for Dogs
Dogs Up to 25 lbs, 6 count - chewable tablets - Blue
Dogs 26-50 lbs, 6 count - chewable tablets - Green
Dogs 50-100 lbs, 6 count - chewable tablets - Brown
SKU : 12025_-RX
Price: $26.99
Price: $26.99

Prevents heartworm disease in dogs

Veterinarian Prescription (RX) Required
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  • Once-A-Month chewable tablet
  • For Use in Dogs and Puppies 6 Weeks of Age or Older
Manufacturer restricts additional discounts on this item unless explicitly specified. 
How to Order Prescriptions


Tri-Heart® Plus are beef-flavored chewable tablets  that is used for heartworm prevention and intestinal worming for complete year round protection. It eliminates the tissue stage of heartworm larvae for a month after infection. This flavored chewable tablet contains ivermectin/pyrantel (68 mcg/57mg), which is a proven combination to protect your dog and ensure your complete peace of mind. 


    • Economical heartworm medication with the same active ingredients as Heartgard Plus
    • Affordable prescription


Tri-Heart® Plus ivermectin/pyrantel chewable tablets should be administered orally at monthly intervals at the recommended minimum dose level of 6 mcg of ivermectin per kilogram (2.72 mcg/lb) and 5 mg of pyrantel (as pamoate salt) per kg (2.27 mg/lb) of body weight.

Dog Weight                             Chewable Tablets per Month           Ivermectin Content         Pyrantel Content             Color Coding on Blister Card and Carton      
 Up to 25 lbs 1 68 mcg  57 mg  Blue 
26 to 50 lbs  136 mcg  114 mg  Green
 51 to 100 lbs 1 272 mcg  227 mg  Brown 
*For dogs over 100 lbs, use the appropriate combination of these tablets.


Remove only one chewable tablet at a time from the blister card. Because most dogs find Tri-Heart Plus chewable tablets palatable, the product can be offered to the dog by hand. Alternatively, it may be added intact to a small amount of dry food or placed in the back of the dog's mouth for forced swallowing. 

Care should be taken that the dog consumes the complete dose, and treated animals should be observed for a few minutes after administration to ensure that part of the dose is not lost or rejected. If it is suspected that any of the dose has been lost, redosing is recommended.

How Supplied

Tri-Heart Plus chewable tablets are available in three dosage strengths for dogs of different weights. Each strength comes in convenient packs of 6 chewable tablets.  

Tri-Heart Plus is a registered trademark of Intervet Inc., d/b/a Merck Animal Health, a subsidiary of Merck & Co. Inc.