Drug profile

The FDA adverse-event record for Ivermectin 0.5% Pour-On Topical Solution

348 FDA reports name Ivermectin 0.5% Pour-On Topical Solution, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#384 of 2,679
by report volume (all drugs)
348
adverse-event reports
3.7%
death-coded share
Cattle
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Ivermectin 0.5% Pour-On Topical Solution ranks #384 of 2679 by total reports (348) and #864 of 1130 by death-coded share (3.7%). 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)
#384
This drug, reports of 2679
#864
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. Ivermectin 0.5% Pour-On Topical Solution has 348 reports now versus 348 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 Ivermectin 0.5% Pour-On Topical Solution changes

Signature read: 348 reports place Ivermectin 0.5% Pour-On Topical Solution in the upper third of FDA AER volume (#384 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.
348
Total Reports
13
Deaths Reported
3.7%
Death-coded share of reports

Active Ingredients

Ivermectin 0.5% Pour-On Topical Solution

Administration Routes

TopicalOtherUnknownOralSubcutaneousTransdermal

Species Affected

Cattle 287
Unknown 38
Dog 10
Human 7
Cat 2
Goat 2
Sheep 1
Rabbit 1

Most Affected Breeds

Aberdeen Angus 121
Cattle (unknown) 59
Unknown 49
Crossbred Bovine/Cattle 46
Cattle (other) 36
Charolais 8
Simmental 5
Hereford cattle 3
Dog (unknown) 2
European 2

Most Reported Reactions

Systemic disorder NOS 179
Lack of efficacy (ectoparasite) - lice 145
Hair loss NOS 111
Scratching 85
Rubbing 66
INEFFECTIVE, LICE BITING 61
Pruritus 33
Itching 29
General hair loss 26
SKIN SCRAPING ABNORMAL 26
Rubra 23
Lack of efficacy (ectoparasite) - NOS 21

Outcome Breakdown

Outcome Unknown
218 (69.4%)
Recovered with Sequela
48 (15.3%)
Ongoing
23 (7.3%)
Recovered/Normal
12 (3.8%)
Died
12 (3.8%)
Euthanized
1 (0.3%)

Ivermectin 0.5% Pour-On Topical Solution: 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 Ivermectin 0.5% Pour-On Topical Solution, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

  • Compare Ivermectin 0.5% Pour-On Topical Solution'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 Ivermectin 0.5% Pour-On Topical Solution (#384 of 2,679 by report volume); death-coded 3.7%. PlainBreed drug row · report volume stamp 348 · 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 →