For more information on Proheart 6,
Letter from Wyeth to veterinarians about Proheart 6 adverse reactions http://www.wyethah.ca/pdfs/Canine/EngLetterMarch16.pdf .
American Veterinary Medical Article about Proheart 6 http://www.avma.org/onlnews/javma/oct04/041015a.asp "Over the course of the past three years, however, the FDA has received 5,913 adverse events reports about the drug from veterinarians and dog owners. According to the FDA, many of these reports involved life-threatening events, such as anaphylaxis, convulsions, hematopoetic disorders, and hepatopathies—about 616 reports involved deaths. The FDA has also evaluated a number of reports involving neurologic problems and cardiac signs."
