Drug profile

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

73 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Ivermectin 0.5% Pour-On. Species, reactions, and outcomes follow.

#917 of 2,679
by report volume (all drugs)
73
adverse-event reports
1.4%
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 ranks #914 of 2679 by total reports (73) and #1040 of 1130 by death-coded share (1.4%). 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)
#914
This drug, reports of 2679
#1040
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 has 73 reports now versus 73 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 changes

Signature read: Ivermectin 0.5% Pour-On's 1.4% death-coded share is among the lowest in the openFDA drug corpus.

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
73
Total Reports
1
Deaths Reported
1.4%
Death-coded share of reports

Active Ingredients

Ivermectin 0.5% Pour-On

Administration Routes

UnknownTopicalOtherOralTransdermalOphthalmic

Species Affected

Cattle 45
Human 14
Unknown 10
Dog 3
Pig 1

Most Affected Breeds

Unknown 24
Cattle (unknown) 17
Aberdeen Angus 15
Cattle (other) 6
Crossbred Bovine/Cattle 4
Dog (unknown) 2
Pig (unknown) 1
Hereford cattle 1
Holstein-Friesian also known as Holstein 1
Charolais 1

Most Reported Reactions

Lack of efficacy (ectoparasite) - lice 19
Uncoded sign 14
Pruritus 10
Lack of efficacy - NOS 10
INEFFECTIVE, LICE BITING 8
Skin disorders NOS 8
Hair loss NOS 6
Containers, Damaged 5
General hair loss 5
Itching 5
Scratching 4
Diarrhoea 4

Outcome Breakdown

Outcome Unknown
52 (82.5%)
Recovered/Normal
7 (11.1%)
Ongoing
2 (3.2%)
Died
1 (1.6%)
Recovered with Sequela
1 (1.6%)

Ivermectin 0.5% Pour-On: 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.

Nationwide drugs with similar profiles

Two openFDA-derived peer sets for Ivermectin 0.5% Pour-On, 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'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 (#917 of 2,679 by report volume); death-coded 1.4%. PlainBreed drug row · death-coded share stamp 1.4% · 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 →