Here are my thoughts on the news story on Trifexis. We use this product to prevent flea infestation and heartworm prevention on many of our patients and our pets. Like all drugs available for us to use, there are potential undesirable side effects. The most common side effect for Trifexis is upset stomach. There is also a documented increase in the potential for seizures, so it is not our first choice for use in dogs that have seizure problems. Any drug that is used on a large number of pets, or people for that matter, can produce some unexpected reactions, even death, as idiosyncratic reactions. There are other times, when for a variety of reasons, a pet owner may blame a problem on a drug because of timing of symptoms in association with the giving of the drug. In many of these situations, the test of time reveals that there was another cause. Many of the drugs we use that have saved pets lives or improved that quality of pets lives on a daily basis in practices all over the world, have some individuals who are convinced those drugs killed their pet and should be pulled from the market. We would love to have a 100% safe prevention for fleas and heartworm disease, both are huge news worthy causes of suffering and death in our pets. Sadly, there does not seem to be any available. If we find significant evidence that a medication is a problem for our patients and personal pets, we will certainly change our recommendations and do our best to inform our customers. Until then, keep your pets on monthly heartworm prevention, and flea prevention where needed.
My best wishes to all of our clients and your pets.
Mike Gallagher, DVM
Another GREAT letter from a veterinarian can be found here: Trifexis: Killing, Correlation, and Cost/Benefit
Established in 1979