Drug profile

The FDA adverse-event record for Misoprostal

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

49
adverse-event reports
2.0%
death-coded share
Horse
most-reported species
26
Lack of efficacy - NOS - 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.
49
Total Reports
1
Deaths Reported
2.0%
Death Rate

Active Ingredients

Misoprostal

Administration Routes

UnknownOral

Species Affected

Horse 48
Dog 1

Most Affected Breeds

Quarter Horse 12
Warmblood (unspecified) 9
Thoroughbred 9
Horse (unknown) 3
Hanovarian 2
Morgan 2
Crossbred Equine/horse 2
Retriever - Labrador 1
Irish Cob (Tinker) 1
Warmblood - Swedish 1

Most Reported Reactions

Lack of efficacy - NOS 26
INEFFECTIVE, GASTRIC ULCER(S) 20
Partial lack of efficacy 9
PR-STOMACH, LESION(S) 2
Licking 1
Hair loss NOS 1
Erythema (for urticaria see Immune SOC) 1
Urticaria 1
Restlessness 1
Not drinking 1
Skin lesion NOS 1
Skin vascular disorder NOS 1

Outcome Breakdown

Ongoing
27 (55.1%)
Outcome Unknown
14 (28.6%)
Recovered/Normal
7 (14.3%)
Euthanized
1 (2.0%)

Misoprostal Adverse Event Insights

49 reports name Misoprostal; 1 recorded a death outcome (2.0% of reported events, not a population-level mortality rate). Active ingredient: Misoprostal. Administration routes: Unknown, Oral.

By species: Horse (48 reports), Dog (1 reports). By breed: Quarter Horse (12), Warmblood (unspecified) (9), Thoroughbred (9).

Leading clinical signs: Lack of efficacy - NOS (26), INEFFECTIVE, GASTRIC ULCER(S) (20), Partial lack of efficacy (9), PR-STOMACH, LESION(S) (2). Outcome, 49 coded reports: Ongoing leads at 55.1%.

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.