Heartworm Medicine For Dogs Side Effects. However to learn more about the treatment and heartworm medicine for dogs, keep reading this article. Some dogs are dangerously oversensitive to ivermectin, the active ingredient in some commonly used heartworm prevention medicines for dogs.

Many dogs have advanced heartworm disease at the time they are diagnosed. The heartworm treatment injections themselves can be very painful for some dogs, so most veterinarians will This medication’s most common side effect is an upset stomach, but it’s a fairly rare occurrence.