Drug profile

The FDA adverse-event record for Ivermectin 1.87% Parziquantel 14.03%

33 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Ivermectin 1.87% Parziquantel 14.03%. See the species affected, top reactions, and outcomes below.

33
adverse-event reports
15.2%
death-coded share
Horse
most-reported species
6
Uncoded sign - 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.
33
Total Reports
5
Deaths Reported
15.2%
Death Rate

Active Ingredients

Ivermectin 1.87% Parziquantel 14.03%

Administration Routes

OralUnknown

Species Affected

Horse 16
Unknown 12
Dog 3
Cat 2

Most Affected Breeds

Unknown 13
Quarter Horse 5
Horse (unknown) 3
Collie (unspecified) 2
Warmblood - Dutch 1
Domestic Shorthair 1
Domestic Mediumhair 1
Shih Tzu 1
Paint 1
Horse (other) 1

Most Reported Reactions

Uncoded sign 6
Ataxia 5
Underfilling, Tubes 5
Colic 4
Death 3
Death by euthanasia 3
Lethargy (see also Central nervous system depression in 'Neurological') 3
Diarrhoea 3
Locking Mechanism Abnormal 3
Product problem 3
Underfilling, Container 3
Depression 2

Outcome Breakdown

Outcome Unknown
9 (40.9%)
Recovered/Normal
7 (31.8%)
Died
3 (13.6%)
Euthanized
3 (13.6%)

Ivermectin 1.87% Parziquantel 14.03% Adverse Event Insights

33 reports name Ivermectin 1.87% Parziquantel 14.03%; 5 recorded a death outcome (15.2% of reported events, not a population-level mortality rate). Active ingredient: Ivermectin 1.87% Parziquantel 14.03%. Administration routes: Oral, Unknown.

By species: Horse (16 reports), Unknown (12 reports), Dog (3 reports). By breed: Unknown (13), Quarter Horse (5), Horse (unknown) (3).

Leading clinical signs: Uncoded sign (6), Ataxia (5), Underfilling, Tubes (5), Colic (4). Outcome, 22 coded reports: Outcome Unknown leads at 40.9%.

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.