Hygromycin B — 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. Hygromycin B is a active ingredient.
Total reports
Hygromycin B: 34
Reports by species (top entries)
- Chicken 27
- Human 3
- Horse 1
- Pig 1
Top reported reactions (VEDDRA terms, top entries)
- INEFFECTIVE, WORMS NOS 10
- Death 8
- INEFFECTIVE, ASCARIDS NOS 8
- Lack of efficacy (endoparasite) - roundworm NOS 6
- Lack of efficacy - NOS 4
- Liver disorder NOS 3
- Application site dermatitis 2
- NT - Abnormal necropsy finding NOS 2
- Uncoded sign 2
- Abdominal pain 1
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b26.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).