Narasin — 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. Narasin is a active ingredient.
Total reports
Narasin: 556
Reports by species (top entries)
- Chicken 311
- Pig 149
- Turkey 13
- Human 9
- Cattle 7
- Dog 4
Top reported reactions (VEDDRA terms, top entries)
- Death 250
- Lack of efficacy (protozoa) - Coccidia 121
- Increased mortality rate 69
- Lameness 50
- Death by euthanasia 43
- Granules/Powder, Abnormal 41
- Lack of efficacy - NOS 36
- Recumbency 36
- NT - Abnormal necropsy finding NOS 34
- Enteritis 27
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b13.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).