Cephalexin — 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 2026-07-21. Counts are report-level: one report may list multiple reactions and multiple animals, so figures are not additive and do not imply causation. Cephalexin is a veterinary active ingredient.
Total reports
Cephalexin: 2838
Reports by species (top entries)
- Dog 2659
- Cat 89
- Human 3
- Ferret 2
Top reported reactions (VEDDRA terms, top entries)
- Vomiting 760
- Emesis 371
- Lethargy (see also Central nervous system depression in 'Neurological') 369
- Diarrhoea 223
- Overdose 219
- Other abnormal test result NOS 210
- Accidental exposure 205
- Lack of efficacy - NOS 185
- Anorexia 177
- Death by euthanasia 144
"Lack of efficacy" terms denote product-performance reports, not adverse reactions.
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-21.json (openFDA animalandveterinary/event.json, pulled 2026-07-21).