Drug profile

The FDA adverse-event record for Ivermectin / Pyrantel Tablets

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

633
adverse-event reports
5.1%
death-coded share
Dog
most-reported species
186
Vomiting - 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.
633
Total Reports
32
Deaths Reported
5.1%
Death Rate

Active Ingredients

Ivermectin / Pyrantel Tablets

Administration Routes

OralUnknownOropharyngealTopical

Species Affected

Dog 623
Unknown 9
Human 1

Most Affected Breeds

Crossbred Canine/dog 195
Retriever - Labrador 51
Retriever - Golden 34
Shepherd Dog - German 23
Shepherd Dog - Australian 19
Shih Tzu 17
Terrier - Yorkshire 14
Pit Bull 13
Terrier (unspecified) 13
Boxer (German Boxer) 12

Most Reported Reactions

Vomiting 186
Emesis (multiple) 81
Lack of efficacy (endoparasite) - heartworm 76
Lethargy (see also Central nervous system depression in 'Neurological') 66
Diarrhoea 60
Seizure NOS 57
Ataxia 27
Death by euthanasia 22
INEFFECTIVE, HOOKS 22
Anorexia 20
Other abnormal test result NOS 19
Bloody diarrhoea 16

Outcome Breakdown

Recovered/Normal
288 (46.2%)
Ongoing
246 (39.4%)
Outcome Unknown
45 (7.2%)
Euthanized
22 (3.5%)
Recovered with Sequela
13 (2.1%)
Died
10 (1.6%)

Ivermectin / Pyrantel Tablets Adverse Event Insights

633 reports name Ivermectin / Pyrantel Tablets; 32 recorded a death outcome (5.1% of reported events, not a population-level mortality rate). Active ingredient: Ivermectin / Pyrantel Tablets. Administration routes: Oral, Unknown, Oropharyngeal, Topical.

By species: Dog (623 reports), Unknown (9 reports), Human (1 reports). By breed: Crossbred Canine/dog (195), Retriever - Labrador (51), Retriever - Golden (34).

Leading clinical signs: Vomiting (186), Emesis (multiple) (81), Lack of efficacy (endoparasite) - heartworm (76), Lethargy (see also Central nervous system depression in 'Neurological') (66). Outcome, 624 coded reports: Recovered/Normal leads at 46.2%.

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.