Drug profile

The FDA adverse-event record for Lufenuron + Milbemycin Oxime

8,207 FDA reports name Lufenuron + Milbemycin Oxime, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#33 of 2,679
by report volume (all drugs)
8,207
adverse-event reports
1.9%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Lufenuron + Milbemycin Oxime ranks #33 of 2679 by total reports (8,207) and #996 of 1130 by death-coded share (1.9%). 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)
#33
This drug, reports of 2679
#996
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. Lufenuron + Milbemycin Oxime has 8,207 reports now versus 8,207 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 Lufenuron + Milbemycin Oxime changes

Signature read: 8,207 reports place Lufenuron + Milbemycin Oxime in the upper third of FDA AER volume (#33 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.
8,207
Total Reports
154
Deaths Reported
1.9%
Death-coded share of reports

Active Ingredients

LufenuronMilbemycin Oxime

Administration Routes

OralUnknownTopicalOtherOphthalmic

Species Affected

Dog 7,760
Unknown 410
Human 22
Cat 11
Wolf 2
Quail 1
Other Canids 1

Most Affected Breeds

Retriever - Labrador 1,156
Unknown 441
Shepherd Dog - German 439
Retriever - Golden 389
Crossbred Canine/dog 385
Chihuahua 248
Beagle 235
Dog (unknown) 232
Terrier - Yorkshire 213
Shih Tzu 206

Most Reported Reactions

INEFFECTIVE, HEARTWORM LARVAE 1,253
Lack of efficacy - NOS 962
INEFFECTIVE, HOOKS 879
Diarrhoea 715
Vomiting 701
Lethargy (see also Central nervous system depression in 'Neurological') 697
Lack of efficacy (endoparasite) - heartworm 615
Emesis 597
Lack of efficacy (endoparasite) - hookworm 504
INEFFECTIVE, ASCARIDS NOS 349
Lack of efficacy (heartworm) 338
Lack of efficacy (endoparasite) - whipworm 239

Outcome Breakdown

Outcome Unknown
3,296 (42.3%)
Recovered/Normal
2,821 (36.2%)
Ongoing
1,488 (19.1%)
Died
78 (1.0%)
Euthanized
76 (1.0%)
Recovered with Sequela
26 (0.3%)

Lufenuron + Milbemycin Oxime: 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 Lufenuron + Milbemycin Oxime, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar report volume

Nearest other drugs by FDA report count (8,207 here).

What to do with this drug

  • Compare Lufenuron + Milbemycin Oxime'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 Lufenuron + Milbemycin Oxime (#33 of 2,679 by report volume); death-coded 1.9%. PlainBreed drug row · report volume stamp 8,207 · 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 →