How long do expired dog medications REALLY last? This is one of those questions that most veterinarians and medical professionals try to avoid.
No one really WANTS to answer it - especially in writing. If a family member asks a medical professional in their family, they might get an answer but that is only because they are family.
Most medical professionals are reluctant to advise a client about this.
The Irreverent Veterinarian did some research on this subject and even asked other vets what they did about expired meds for their own pets.
I think you'll find this article quite interesting. Go to: The Irreverent Vet Speaks out - How Long Do Expired Dog Medications Last?