Drug profile

The FDA adverse-event record for Ivermectin And Pyrantel

42 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Ivermectin And Pyrantel. See the species affected, top reactions, and outcomes below.

42
adverse-event reports
4.8%
death-coded share
Dog
most-reported species
10
INEFFECTIVE, HEARTWORM LARVAE - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
42
Total Reports
2
Deaths Reported
4.8%
Death Rate

Active Ingredients

Ivermectin And Pyrantel

Administration Routes

OralUnknown

Species Affected

Dog 42

Most Affected Breeds

Retriever - Labrador 8
Chihuahua 3
Crossbred Canine/dog 3
Shepherd Dog - German 3
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 2
Shih Tzu 2
Dachshund (unspecified) 2
Retriever - Golden 2
Weimaraner 1
Coonhound - Black and Tan 1

Most Reported Reactions

INEFFECTIVE, HEARTWORM LARVAE 10
Vomiting 7
Elevated alanine aminotransferase (ALT) 7
Lack of efficacy (endoparasite) - heartworm 6
Weight loss 4
Seizure NOS 4
Not eating 4
Diarrhoea 3
Not drinking 3
Panting 3
Reluctant to move 3
Lack of efficacy - NOS 3

Outcome Breakdown

Ongoing
17 (40.5%)
Outcome Unknown
14 (33.3%)
Recovered/Normal
8 (19.0%)
Recovered with Sequela
1 (2.4%)
Euthanized
1 (2.4%)
Died
1 (2.4%)

Ivermectin And Pyrantel Adverse Event Insights

42 reports name Ivermectin And Pyrantel; 2 recorded a death outcome (4.8% of reported events, not a population-level mortality rate). Active ingredient: Ivermectin And Pyrantel. Administration routes: Oral, Unknown.

By species: Dog (42 reports). By breed: Retriever - Labrador (8), Chihuahua (3), Crossbred Canine/dog (3).

Leading clinical signs: INEFFECTIVE, HEARTWORM LARVAE (10), Vomiting (7), Elevated alanine aminotransferase (ALT) (7), Lack of efficacy (endoparasite) - heartworm (6). Outcome, 42 coded reports: Ongoing leads at 40.5%.

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.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.