Why is heartworm treatment so expensive?
Sophia Koch
Updated on April 01, 2026
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Likewise, people ask, how much does heartworm treatment cost?
The American Animal Hospital Association places the average cost of preventative heartworm treatment for dogs at $5-$15 per month, and the cost of treating a dog already diagnosed with heartworm at $400-$1,000. With both prevention and treatment, costs typically increase with the weight of the dog.
One may also ask, what is the success rate of heartworm treatment? While most dogs (about 98 percent) treated with heartworm disease will clear the infection and not require additional treatment, there is the chance that a second round of medication is needed.
Accordingly, is heartworm medicine really necessary?
If there are no mosquitoes present, there is no need to use heartworm prevention. Many veterinarians recommend using heartworm prevention year round to prevent intestinal parasites. It can also be helpful for pet parents to establish a routine of giving heartworm prevention at the same time every month.
Does heartworm treatment shorten a dog's life?
This treatment does not actually kill the worms, however it does decrease their lifespan; keep in mind, however, that the average heartworm can live six years, so shortening that lifespan could still mean your dog having a heartworm infection for four more years.
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