Cefazolin — FDA Animal & Veterinary Adverse Event (ADE) Reports
Source: openFDA animalandveterinary/event.json, the FDA Center for Veterinary Medicine (CVM) adverse event report database. Data pulled 2026-07-22. Counts are report-level: one report may list multiple reactions and multiple animals, so figures are not additive and do not imply causation. Cefazolin is a active ingredient.
Total reports
Cefazolin: 522
Reports by species (top entries)
- Dog 413
- Cat 107
- 1
- Horse 1
Top reported reactions (VEDDRA terms, top entries)
- Vomiting 100
- Death 97
- Death by euthanasia 91
- Lethargy (see also Central nervous system depression in 'Neurological') 91
- Other abnormal test result NOS 88
- Anorexia 82
- Not eating 69
- Fever 50
- Elevated blood urea nitrogen (BUN) 48
- Weight loss 47
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b13.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).