Mastiff — FDA Adverse Event Profile

Mastiff Pet Health Insights

Across the FDA Center for Veterinary Medicine adverse event database, Mastiff accounts for 2,952 submitted reports and currently ranks #63 by report volume within the dog population. Of those reports, 182 involved a death outcome — a 620.0% case-fatality figure calculated directly from the underlying FDA records rather than from external mortality studies. The mean age at time of reporting is 3.4 years, with an average recorded body weight of 49.7 kg (109.6 lbs). These figures reflect the voluntary reporting pool only and should be read alongside breed popularity, veterinary access, and owner awareness — all of which shape how many events ever reach the FDA.

The most frequently reported clinical signs for Mastiff are Vomiting (604 reports), Emesis (395 reports), Lethargy (see also Central nervous system depression in 'Neurological') (243 reports), together capturing a substantial share of the top-reaction traffic seen in this breed's record. On the product side, Milbemycin Oxime + Spinosad appears in 777 reports and is the single most-referenced drug, followed by Ivermectin + Pyrantel As Pamoate Salt (346) and Spinosad (278). Counts like these surface which therapeutic classes dominate the reporting stream — useful context when comparing reactions across breeds of the same dog species.

Outcome coding on the 2,659 reports with a recorded status is dominated by Recovered/Normal (36.0% of coded outcomes). Annual submission volume ranges from 2,010 to 2,023 reports across the 14 years on file, indicating the reporting trend is shaped as much by awareness cycles as by underlying clinical events. Because FDA adverse event reports describe correlation rather than causation, these numbers are most useful as a signal of where to ask further questions with a veterinarian — not as a standalone risk score for any individual dog.