Febantel — 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. Febantel is a prodrug anthelmintic (tapeworm / hookworm, dogs & cats).
Total reports
Febantel: 5831
Reports by species (top entries)
- Dog 5463
- Cat 42
- Cockatiel 4
- Human 4
- Horse 2
- Cattle 1
Top reported reactions (VEDDRA terms, top entries)
- Vomiting 2057
- Emesis 647
- Emesis (multiple) 623
- Diarrhoea 563
- Lethargy (see also Central nervous system depression in 'Neurological') 426
- Lack of efficacy (endoparasite) - tapeworm 367
- Lack of efficacy (endoparasite) - hookworm 296
- Overdose 248
- Hyperactivity 235
- Anorexia 233
"Lack of efficacy" terms denote product-performance reports, not adverse reactions.
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b8.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).