Distemper Vaccine — 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. Distemper Vaccine is a vaccine/biologic.
Total reports
Distemper Vaccine: 1135
Reports by species (top entries)
- Dog 1009
- Cat 123
Top reported reactions (VEDDRA terms, top entries)
- Vomiting 365
- Emesis 239
- Lethargy (see also Central nervous system depression in 'Neurological') 197
- Diarrhoea 117
- Other abnormal test result NOS 87
- Behavioural disorder NOS 72
- Seizure NOS 68
- Not eating 61
- Anorexia 51
- Ataxia 48
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b11.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).