ivermectin, pyrantel — FDA Animal & Veterinary ADE Reports by Species (Dog vs Cat)
Source: openFDA animalandveterinary/event.json, the FDA Center for Veterinary Medicine (CVM) adverse event report database. Data pulled 2026-08-16. This topic covers adverse-event reports for the active ingredient Ivermectin, Pyrantel (queried as drug.active_ingredients.name). Overall report total for this ingredient: 63121. Counts are report-level: one report may list multiple reactions and multiple animals, so figures are not additive and do not imply causation. "Serious" follows the FDA serious_ae flag. Species values are as filed in each report. The Dog and Cat figures below are subsets of this ingredient's overall report total and do not necessarily sum to it (other species and reports with no species listed are excluded).
Dog (57309 reports)
- Serious adverse events (FDA
serious_aeflag): 14330 (25.0% of 57309) - Top reported reactions (VEDDRA terms):
- INEFFECTIVE, HEARTWORM LARVAE 21896
- Lack of efficacy (endoparasite) - hookworm 10752
- INEFFECTIVE, ASCARIDS NOS 6926
- Vomiting 6874
- Digestive tract disorder NOS 5701
Cat (44 reports)
- Serious adverse events (FDA
serious_aeflag): 6 (13.6% of 44) - Top reported reactions (VEDDRA terms):
- Accidental exposure 29
- Vomiting 23
- Depression 11
- Ataxia 8
- Anorexia 4
Honest scope note
This topic is a species cross-section of FDA adverse-event reports for a single active ingredient, queried by drug.active_ingredients.name. Figures are aggregates of spontaneously reported adverse events and reflect reporting volume, not incidence or risk per animal treated. "Lack of efficacy" and similar terms denote product-performance reports, not adverse reactions. Different marketed presentations of the same compound (e.g. chewable vs spot-on) may be filed under distinct name strings in openFDA and are not merged here. Source JSON: pdf-raw/ade/ade_species_slice_expand_2026-08-16.json (openFDA animalandveterinary/event.json, pulled 2026-08-16).