Zeranol — 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. Zeranol is a active ingredient.
Total reports
Zeranol: 487
Reports by species (top entries)
- Cattle 109
- Human 18
- Sheep 7
- Horse 1
Top reported reactions (VEDDRA terms, top entries)
- Implant, Abnormal 202
- Dispenser, Abnormal 197
- Product Defect, General 100
- Death 41
- Containers, Abnormal 33
- Vaginal prolapse 26
- Increased sexual interest 21
- Rectal prolapse 16
- Unclassifiable adverse event 16
- Accidental exposure 14
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b13.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).