Drug profile

The FDA adverse-event record for Spinosad And Milbemycin Oxime

720 FDA reports name Spinosad And Milbemycin Oxime, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#229 of 2,679
by report volume (all drugs)
720
adverse-event reports
5.0%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Spinosad And Milbemycin Oxime ranks #229 of 2679 by total reports (720) and #792 of 1130 by death-coded share (5.0%). 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)
#229
This drug, reports of 2679
#792
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. Spinosad And Milbemycin Oxime has 720 reports now versus 718 in that prior snapshot: 2 more (0.3%).

Report change
+2
Death-coded reports
+1
Death-coded share
+0.1 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 Spinosad And Milbemycin Oxime changes

Signature read: 720 reports place Spinosad And Milbemycin Oxime in the upper third of FDA AER volume (#229 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.
720
Total Reports
36
Deaths Reported
5.0%
Death-coded share of reports

Active Ingredients

Spinosad And Milbemycin Oxime

Administration Routes

OralUnknownTopical

Species Affected

Dog 720

Most Affected Breeds

Retriever - Labrador 140
Shepherd Dog - German 48
Terrier - Bull - American Pit 30
Boxer (German Boxer) 23
Shepherd Dog - Australian 23
Beagle 21
Crossbred Canine/dog 21
Chihuahua 20
Retriever - Golden 20
Shih Tzu 18

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 280
INEFFECTIVE, HEARTWORM LARVAE 88
Lethargy (see also Central nervous system depression in 'Neurological') 73
Vomiting 71
Lack of efficacy - NOS 43
Other abnormal test result NOS 38
Seizure NOS 34
Diarrhoea 32
Anorexia 30
Elevated alanine aminotransferase (ALT) 29
Elevated serum alkaline phosphatase (SAP) 27
Pale mucous membrane 18

Outcome Breakdown

Ongoing
554 (76.8%)
Recovered/Normal
75 (10.4%)
Outcome Unknown
56 (7.8%)
Died
20 (2.8%)
Euthanized
16 (2.2%)

Spinosad And 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 Spinosad And 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 (720 here).

Similar death-coded share

Nearest other drugs by death-coded share (5.0% here), distinct from the volume row.

What to do with this drug

  • Compare Spinosad And 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 Spinosad And Milbemycin Oxime (#229 of 2,679 by report volume); death-coded 5.0%. PlainBreed drug row · report volume stamp 720 · 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 →