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Heartworm Medicine & Disease Information for Dogs & Cats

Heartworm Disease & Prevention
Heartworm disease is dangerous, but completely preventable. All dogs should be tested for heartworm infection by a veterinarian before starting a heartworm preventive program. Protect your dog or cat today! View "How to Manage Heartworms" Video

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Heartgard Plus Dog Heartworm Medication
Heartgard® Plus
Chewables (Brand)

Sentinel Dog Heartworm Medication
Sentinel® for Dogs
Sentinel ® Spectrum Heartworm Medication
Sentinel® Spectrum
for Dogs
Iverhart Max Dog Heartworm Medication
Iverhart Max®
for Dogs (Brand)
Tri-Heart Plus Generic Dog Heartworm Medication
Plus (Bio-equivalent)

Revolution Dog Heartworm Medication
for Dogs & Cats
Advantage Multi Heartworm Medication for Dogs
Advantage Multi™
for Dogs (Brand)
Heartgard Chewables Dog Heartworm Medication
Chewables (Brand)
Heartgard Heartworm Medication for Cats
for Cats (Brand)

Revolution Cat Heartworm Medication
for Cats
Advantage Multi Heartworm Medication for Cats
Advantage MultiTM
for Cats (Brand)
Iverhart Plus
Iverhart Plus

We guarantee our heartworm preventives
Up Close: Dr. Marty Smith discusses heartworm prevention
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What is Heartworm Disease?
Heartworm Disease FAQs
Dangers of Heartworm
Quick Facts - Heartworms
Dog Heartworm Quiz

About Dog Heartworm Testing
These products require a prescription from your veterinarian.
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Heartworm disease is a dangerous, but completely preventable infection where parasitic worms grow inside the chambers of your dog or cat's heart and large blood vessels. Left undetected, heartworm disease can become serious and even result in death as worms eventually block blood flow to the heart and lungs. That's why heartworm prevention and early detection are so important! Protect your dog & cat against the dangers of heartworm. By offering both brand name dog heartworm medicines like Heartgard Plus, Interceptor, Sentinel, and Revolution - PLUS economical, FDA-approved bio-equivalents like Tri-Heart Plus - we believe more dogs & cats will be able to receive the heartworm protection they need.

Heartworm Disease, caused by the parasite Dirofilaria immitis, was once considered a disease of the southern United States. But it is now found in every state in the continental United States. The mosquito is the only known vector for transmitting heartworm. Microfilariae enter a mosquito when it bites an infected pet. In 10-28 days they mature into larvae. The larvae enter a new animal's body when it is bitten by an infected mosquito. Larvae mature and migrate to the pet's heart. Worms in the heart mate and produce microfilariae (6-7 months after infection in dogs, 8 months in cats).

An important part of a complete heartworm prevention program is testing. All dogs should be tested for heartworm infection before starting a preventive program. Testing ensures that your pet is free of adult heartworms, and ready to start or continue on heartworm preventive medication. The American Heartworm Society (AHS) estimates that only 50% of dogs in areas where heartworm occurs are actually on heartworm preventives. Of those prescribed heartworm prevention products, only about 75% receive all of the doses. Since heartworm continues to be a fatal disease and pet owners' compliance with heartworm prevention is less than optimal, the AHS recommends these guidelines for heartworm testing »

* In a small percentage of ivermectin/pyrantel treated dogs, digestive and neurological side effects may occur.


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