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Author: Admin | 2025-04-28
Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more. The information is current and up-to-date in accordance with the latest veterinarian research. Learn more » Heartworm disease can be fatal for our beloved dogs, but it’s also very preventable. Regularly administering heartworm medication is highly effective in protecting your dog.Most heartworm medicines have similar active ingredients. These ingredients can interfere with other treatments and also trigger significant side effects. Therefore, it’s essential to know what’s inside your dog’s heartworm medicine and work with your veterinarian to find one that’s safe for your dog.Our guide contains thorough reviews of the best heartworm medicines as well as information on common active ingredients. Make sure to read through this guide so that you can find the best heartworm medicine for your precious pup.A Quick Look at Our Favorites in 2025 The 10 Best Heartworm Medicines for Dogs1. Heartgard Plus Chew for Dogs – Best OverallActive Ingredients:Ivermectin, pyrantelAge Range:Puppies 6 weeks and olderAdministration Form:OralPossible Side Effects:Vomiting, diarrhea, depression/lethargy, anorexia, mydriasis1, ataxia2, staggering, convulsions, hypersalivationHeartgard Plus Chew for Dogs is a chew that prevents heartworms3 and controls hookworms and roundworms. Each chew also contains real beef, so many dogs find them to be delicious treats that they get to eat once a month.The formula is safe for puppies over 6 weeks old and pregnant dogs. Collies are often sensitive to the common active ingredients in heartworm medication, but clinical trials
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