Drug profile

The FDA adverse-event record for Pyrantel

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

754
adverse-event reports
9.8%
death-coded share
Dog
most-reported species
143
Vomiting - top reaction
Verify with FDA CVM →
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
754
Total Reports
74
Deaths Reported
9.8%
Death Rate

Active Ingredients

Pyrantel

Administration Routes

OralUnknownOphthalmicNasalSubcutaneousRespiratory (Inhalation)Topical

Species Affected

Dog 649
Cat 81
Unknown 13
Horse 6
Human 3
Pig 1
Other Reptiles 1

Most Affected Breeds

Crossbred Canine/dog 62
Pit Bull 49
Retriever - Labrador 48
Domestic Shorthair 48
Dog (unknown) 45
Greyhound 35
Chihuahua 31
Unknown 30
Retriever - Golden 27
Shepherd Dog - Australian 22

Most Reported Reactions

Vomiting 143
Lethargy (see also Central nervous system depression in 'Neurological') 96
Lack of efficacy (endoparasite) - hookworm 90
Diarrhoea 81
Overdose 57
Death 56
Lack of efficacy (endoparasite) - roundworm NOS 56
Underdose 54
Lethargy (see also Central nervous system depression in Neurological) 46
Not eating 42
Emesis (multiple) 38
Cough 33

Outcome Breakdown

Outcome Unknown
331 (44.0%)
Recovered/Normal
182 (24.2%)
Ongoing
157 (20.9%)
Died
64 (8.5%)
Euthanized
10 (1.3%)
Recovered with Sequela
8 (1.1%)

Pyrantel Adverse Event Insights

754 reports name Pyrantel; 74 recorded a death outcome (9.8% of reported events, not a population-level mortality rate). Active ingredient: Pyrantel. Administration routes: Oral, Unknown, Ophthalmic, Nasal.

By species: Dog (649 reports), Cat (81 reports), Unknown (13 reports). By breed: Crossbred Canine/dog (62), Pit Bull (49), Retriever - Labrador (48).

Leading clinical signs: Vomiting (143), Lethargy (see also Central nervous system depression in 'Neurological') (96), Lack of efficacy (endoparasite) - hookworm (90), Diarrhoea (81). Outcome, 752 coded reports: Outcome Unknown leads at 44.0%.

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.