Phenytoin Sodium — 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. Phenytoin Sodium is a active ingredient.
Total reports
Phenytoin Sodium: 302
Reports by species (top entries)
- Dog 162
- Cat 41
- Horse 31
- Human 13
- Other 4
- Eagle 2
Top reported reactions (VEDDRA terms, top entries)
- INEFFECTIVE, EUTHANASIA 140
- Lack of efficacy - NOS 90
- INEFFECTIVE, DELAYED EFFECT 34
- Overdose 18
- Agonal breathing 16
- Death by euthanasia 15
- Vocalisation 14
- Accidental exposure 10
- Stopper, abnormal 9
- Appearance, Abnormal 8
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b16.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).