Lufenuron + Milbemycin Oxime
8,207 adverse event reports submitted to the FDA
Active Ingredients
Administration Routes
Species Affected
Most Affected Breeds
Most Reported Reactions
Outcome Breakdown
Data Summary
| Metric | Value |
|---|---|
| Total adverse event reports | 8,207 |
| Reports involving death | 154 |
| Case-fatality rate (reported events) | 190.0% |
| Distinct species in reports | 7 |
| Distinct breeds in reports | 20 |
| Distinct reactions reported | 20 |
| Active ingredients on file | 2 |
Source: FDA Center for Veterinary Medicine — Adverse Event Reporting (CVM AER). Counts reflect voluntary reports only.
Lufenuron + Milbemycin Oxime Adverse Event Insights
The FDA Center for Veterinary Medicine database currently holds 8,207 adverse event reports referencing Lufenuron + Milbemycin Oxime, including 154 reports in which the animal died — a 190.0% case-fatality figure among reported events only, not a population-level mortality rate. Active ingredients on file: Lufenuron, Milbemycin Oxime. Reported administration routes include Oral, Unknown, Topical, Ophthalmic. These numbers reflect voluntary submissions from pet owners, veterinarians, and manufacturers and therefore under-represent mild events and over-represent severe ones — a pattern the FDA has documented repeatedly for pharmacovigilance datasets.
The species most frequently named in Lufenuron + Milbemycin Oxime reports are Dog (7,760 reports), Unknown (410 reports), Human (22 reports), with Dog accounting for the largest share. Within those species, Retriever - Labrador (1,156), Unknown (441), Shepherd Dog - German (439) appear most often — though breed popularity and ownership density shape these counts as much as any drug-specific sensitivity. This distribution matters because the same active ingredient can behave very differently across body sizes, ages, and species physiology.
The most commonly reported clinical signs associated with Lufenuron + Milbemycin Oxime are INEFFECTIVE, HEARTWORM LARVAE (1,253), Lack of efficacy - NOS (962), INEFFECTIVE, HOOKS (879), Diarrhoea (715). Of the 7,785 reports with a coded outcome, Outcome Unknown is the leading category at 42.3%. Because FDA adverse event data describes correlation rather than causation, these figures are best used to frame informed questions with a veterinarian and to compare reporting patterns across related products — not as a standalone safety verdict on Lufenuron + Milbemycin Oxime.
Source: FDA Center for Veterinary Medicine — Adverse Event Reports FDA Center for Veterinary Medicine — Adverse Event Reports Data reflects voluntary submissions and may not represent actual incidence rates
Read our methodology — how this data is sourced, computed, and verified.