Toltrazuril — 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. Toltrazuril is a active ingredient.
Total reports
Toltrazuril: 7
Reports by species (top entries)
- Dog 4
- Horse 2
- Chicken 1
Top reported reactions (VEDDRA terms, top entries)
- Death 2
- Fever 2
- Potency, High 2
- Ataxia 1
- Cough 1
- Death by euthanasia 1
- Drug dose omission 1
- Drug preparation error 1
- Increased mortality rate 1
- Lack of efficacy (endoparasite) - heartworm 1
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b33.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).