Drug profile

The FDA adverse-event record for Ivermectin & Pyrantel

575 FDA reports name Ivermectin & Pyrantel, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#274 of 2,679
by report volume (all drugs)
575
adverse-event reports
2.8%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Ivermectin & Pyrantel ranks #274 of 2679 by total reports (575) and #933 of 1130 by death-coded share (2.8%). 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)
#274
This drug, reports of 2679
#933
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 & Pyrantel has 575 reports now versus 575 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 & Pyrantel changes

Signature read: 575 reports place Ivermectin & Pyrantel in the upper third of FDA AER volume (#274 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.
575
Total Reports
16
Deaths Reported
2.8%
Death-coded share of reports

Active Ingredients

Ivermectin & Pyrantel

Administration Routes

OralUnknownOphthalmic

Species Affected

Dog 574
Cat 1

Most Affected Breeds

Retriever - Labrador 88
Shepherd Dog - German 35
Chihuahua 29
Retriever - Golden 26
Crossbred Canine/dog 18
Terrier - Bull - American Pit 17
Beagle 15
Dog (unknown) 15
Terrier (unspecified) 14
Dachshund (unspecified) 13

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 209
Vomiting 74
Seizure NOS 53
Lethargy (see also Central nervous system depression in 'Neurological') 45
Lack of efficacy - NOS 38
Diarrhoea 28
INEFFECTIVE, HEARTWORM LARVAE 27
Ataxia 24
INEFFECTIVE, HEARTWORM ADULTS 24
Anorexia 22
Elevated alanine aminotransferase (ALT) 19
Tremor 18

Outcome Breakdown

Ongoing
402 (69.8%)
Outcome Unknown
87 (15.1%)
Recovered/Normal
71 (12.3%)
Euthanized
9 (1.6%)
Died
7 (1.2%)

Ivermectin & Pyrantel: 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 & Pyrantel, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

  • Compare Ivermectin & Pyrantel'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 & Pyrantel (#274 of 2,679 by report volume); death-coded 2.8%. PlainBreed drug row · report volume stamp 575 · 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 →