Lomustine — 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. Lomustine is a veterinary active ingredient.
Total reports
Lomustine: 33
Reports by species (top entries)
- Dog 24
- Cat 9
Top reported reactions (VEDDRA terms, top entries)
- Death by euthanasia 7
- Decreased appetite 7
- Lack of efficacy - NOS 7
- Diarrhoea 6
- Lethargy (see also Central nervous system depression in 'Neurological') 6
- Behavioural disorder NOS 5
- Anorexia 4
- Death 4
- Elevated blood urea nitrogen (BUN) 4
- Elevated creatinine 4
"Lack of efficacy" terms denote product-performance reports, not adverse reactions.
Source JSON: pdf-raw/ade/ade_active_ingredients_2026-07-22_b6.json (openFDA animalandveterinary/event.json, pulled 2026-07-22).