Drug profile

The FDA adverse-event record for Ivermectin 1.87% Paste

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

92
adverse-event reports
1.1%
death-coded share
Unknown
most-reported species
23
Ataxia - 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.
92
Total Reports
1
Deaths Reported
1.1%
Death Rate

Active Ingredients

Ivermectin 1.87% Paste

Administration Routes

OralUnknownOtherParenteral

Species Affected

Unknown 35
Dog 25
Horse 25
Human 4
Cat 3

Most Affected Breeds

Unknown 39
Quarter Horse 8
Dog (unknown) 7
Horse (unknown) 5
Shepherd Dog - Australian 4
Thoroughbred 4
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 2
Standardbred (unspecified) 2
Pit Bull 2
Beagle 2

Most Reported Reactions

Ataxia 23
Uncoded sign 19
Mydriasis 10
Locking Mechanism Abnormal 8
Blindness 7
Containers, Damaged 6
Other abnormal test result NOS 6
Labeled drug-species interaction 6
Difficulty of Use 6
Lethargy (see also Central nervous system depression in 'Neurological') 5
Behavioural disorder NOS 5
Accidental exposure 5

Outcome Breakdown

Outcome Unknown
46 (80.7%)
Recovered/Normal
9 (15.8%)
Ongoing
1 (1.8%)
Died
1 (1.8%)

Ivermectin 1.87% Paste Adverse Event Insights

92 reports name Ivermectin 1.87% Paste; 1 recorded a death outcome (1.1% of reported events, not a population-level mortality rate). Active ingredient: Ivermectin 1.87% Paste. Administration routes: Oral, Unknown, Other, Parenteral.

By species: Unknown (35 reports), Dog (25 reports), Horse (25 reports). By breed: Unknown (39), Quarter Horse (8), Dog (unknown) (7).

Leading clinical signs: Ataxia (23), Uncoded sign (19), Mydriasis (10), Locking Mechanism Abnormal (8). Outcome, 57 coded reports: Outcome Unknown leads at 80.7%.

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.