Question:

Are there any treatments for heartworms that aren't harmful to dogs?

Answer:

There are two things to keep in mind regarding “treatment” for heartworm in dogs:

The first is that heartworm disease is preventable with the use of a routine prescription medication you can get from your veterinarian. There are several types available, including topical (those that you apply to the skin), oral (those that are given by mouth), and injectable (a shot given under the skin). These medications are extremely effective in preventing the disease. I recommend discussing your options with your veterinarian.

The second issue is that of treatment. Heartworm disease can be fatal if it is not treated in dogs. Dogs become infected when they are bitten by a mosquito carrying the larval (immature) form of the heartworm. Many larvae can end up in the dog’s bloodstream during the mosquito’s feeding process. These smaller worms grow much larger in the dog, live in the blood vessels of the lungs, and often lead to severe damage to the lungs and heart, and possible death. At this time, there is only one approved medication to treat the disease once it occurs. This medication is given to many dogs every year, but it can be quite expensive, requires close veterinary attention and there are potentially severe risks to the treatment. In addition, the damage done by the worms while they are in the dog (prior to treatment) is unlikely to be reversible.

Be sure to ask your veterinarian about effective heartworm prevention for your dog.

Dr. Revoir’s veterinary opinion should only be used as an educational guide and in no way should be substituted for licensed veterinary care. Your veterinarian should be consulted in all health matters involving your pet.