Famciclovir — 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. Famciclovir is a active ingredient.
Total reports
Famciclovir: 38
Reports by species (top entries)
- Cat 36
- Parrot 2
Top reported reactions (VEDDRA terms, top entries)
- Lack of efficacy (bacteria) - NOS 7
- Lack of efficacy - NOS 6
- Not eating 6
- Anaemia NOS 5
- Lethargy (see also Central nervous system depression in 'Neurological') 5
- Death 4
- Death by euthanasia 4
- Dehydration 4
- Lethargy (see also Central nervous system depression in Neurological) 4
- Neutrophilia 4
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b25.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).