Drug profile

The FDA adverse-event record for Milbemycin Oxime, Lufenuron

6,745 FDA reports name Milbemycin Oxime, Lufenuron, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#36 of 2,679
by report volume (all drugs)
6,745
adverse-event reports
0.9%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Milbemycin Oxime, Lufenuron ranks #36 of 2679 by total reports (6,745) and #1071 of 1130 by death-coded share (0.9%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#36
This drug, reports of 2679
#1071
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Milbemycin Oxime, Lufenuron has 6,745 reports now versus 6,745 in that prior snapshot: 0 the same number of (0.0%).

Report change
+0
Death-coded reports
+0
Death-coded share
+0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Milbemycin Oxime, Lufenuron changes

Signature read: 6,745 reports place Milbemycin Oxime, Lufenuron in the upper third of FDA AER volume (#36 of 2,679).

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
6,745
Total Reports
63
Deaths Reported
0.9%
Death-coded share of reports

Active Ingredients

Milbemycin Oxime, Lufenuron

Administration Routes

OralUnknownTopicalIntrauterine

Species Affected

Dog 6,529
Unknown 196
Cat 10
Human 9
Goat 1

Most Affected Breeds

Crossbred Canine/dog 942
Retriever - Labrador 903
Dog (unknown) 355
Shepherd Dog - German 329
Retriever - Golden 322
Beagle 209
Unknown 206
Terrier - Yorkshire 150
Chihuahua 142
Boxer (German Boxer) 134

Most Reported Reactions

INEFFECTIVE, HEARTWORM LARVAE 1,493
Lack of efficacy (endoparasite) - hookworm 1,406
Vomiting 1,013
INEFFECTIVE, ASCARIDS NOS 838
Diarrhoea 584
Lethargy (see also Central nervous system depression in 'Neurological') 428
Lack of efficacy (endoparasite) - whipworm 424
Lack of efficacy - NOS 348
Lack of efficacy (ectoparasite) - flea 300
INEFFECTIVE, HOOKS 220
Underdose 184
Overdose 181

Outcome Breakdown

Outcome Unknown
4,561 (69.6%)
Recovered/Normal
1,798 (27.4%)
Ongoing
102 (1.6%)
Died
32 (0.5%)
Euthanized
31 (0.5%)
Recovered with Sequela
29 (0.4%)

Milbemycin Oxime, Lufenuron: low death-coded share in the FDA AER row

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Milbemycin Oxime, Lufenuron, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

  • Compare Milbemycin Oxime, Lufenuron's report volume and death-coded share against similar drugs nationwide. See similar drugs
  • Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
  • Browse the full drug directory to compare report counts across products. All drugs

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Milbemycin Oxime, Lufenuron (#36 of 2,679 by report volume); death-coded 0.9%. PlainBreed drug row · report volume stamp 6,745 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →