Heartgard® Plus (ivermectin/pyrantel) for small dogs (up to 25 lbs) is a chewable, beef-flavored tablet administered once a month to protect your dog from the threat of potentially deadly heartworm disease, plus control against roundworms and hookworms.Heartgard Plus is approved for use in puppies as young as 6 weeks, small dogs regardless of weight, pregnant or breeding dogs, and Collies. Dogs 6-months of age and older should be tested for heartworm disease prior to being put on a preventive program and tested annually thereafter. (Heartgard Plus is available only through prescription from a licensed veterinarian.)Heartgard Plus is also available for medium (26–50 lbs) and large (51–100 lb) dogs. For dogs over 100 lbs, mix and match to reach the appropriate weight range. The convenient Never Forget reminder system sends one dose of the medication out each month to keep your pet’s treatment on schedule.

Heartgard® Plus (ivermectin/pyrantel) for large dogs (51-100 lbs) is a chewable, beef-flavored tablet administered once a month to protect your dog from the threat of potentially deadly heartworm disease, plus control against roundworms and hookworms.Heartgard Plus is approved for use in puppies as young as 6 weeks, small dogs regardless of weight, pregnant or breeding dogs, and Collies. Dogs 6-months of age and older should be tested for heartworm disease prior to being put on a preventive program and tested annually thereafter. (Heartgard Plus is available only through prescription from a licensed veterinarian.)Heartgard Plus is also available for small (up to 25 lbs) and medium (26-50 lb) dogs. For dogs over 100 lbs, mix and match to reach the appropriate weight range. The convenient Never Forget reminder system sends one dose of the medication out each month to keep your pet’s treatment on schedule.