Drug profile

The FDA adverse-event record for Ponazuril

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

312
adverse-event reports
17.0%
death-coded share
Horse
most-reported species
32
Uncoded sign - 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.
312
Total Reports
53
Deaths Reported
17.0%
Death Rate

Active Ingredients

Ponazuril

Administration Routes

OralUnknownTopicalSubcutaneousIntramuscularIntragastricOtherIntraocular

Species Affected

Horse 117
Unknown 96
Dog 58
Cat 32
Human 3
Ferret 2
Pig 2
Macaw 1
Cattle 1

Most Affected Breeds

Unknown 104
Quarter Horse 24
Horse (unknown) 22
Domestic Shorthair 19
Thoroughbred 14
Paint 12
Warmblood (unspecified) 11
Tennessee Walking Horse 8
Retriever - Labrador 8
Crossbred Canine/dog 7

Most Reported Reactions

Uncoded sign 32
Death by euthanasia 28
Death 27
Ataxia 26
Diarrhoea 22
Other abnormal test result NOS 21
Anorexia 20
Lack of efficacy (protozoa) - NOS 20
Vomiting 19
Lethargy (see also Central nervous system depression in 'Neurological') 18
Lack of efficacy - NOS 14
Dispenser, Abnormal 14

Outcome Breakdown

Outcome Unknown
82 (38.1%)
Recovered/Normal
49 (22.8%)
Ongoing
29 (13.5%)
Died
28 (13.0%)
Euthanized
27 (12.6%)

Ponazuril Adverse Event Insights

312 reports name Ponazuril; 53 recorded a death outcome (17.0% of reported events, not a population-level mortality rate). Active ingredient: Ponazuril. Administration routes: Oral, Unknown, Topical, Subcutaneous.

By species: Horse (117 reports), Unknown (96 reports), Dog (58 reports). By breed: Unknown (104), Quarter Horse (24), Horse (unknown) (22).

Leading clinical signs: Uncoded sign (32), Death by euthanasia (28), Death (27), Ataxia (26). Outcome, 215 coded reports: Outcome Unknown leads at 38.1%.

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.