Total Reports
31
FDA CVM filings
Horse /
FDA CVM · 2025 release 31 reports on file
Rocky Mountain Horse - FDA Adverse Event Profile
Adverse-event records for Rocky Mountain Horse (Horse) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Rocky Mountain Horse's FDA record: #314 most-reported horse breed, 31 total reports, 9.7% death-coded (3 reports).
- #314
- most-reported horse breed
- 9.7%
- death-coded report share
- 3
- Fever - top reaction
- 14.8 yr
- average age at report
Read report counts next to breed popularity: a bigger number often just means more owners and more vet visits.
Deaths Reported
3
of 31 reports
Death Rate
9.7%
death-coded share
Avg Age at Report
14.8 yr
432.3 kg avg weight
Death-Coded Outcome Share
Rocky Mountain Horse death-coded reports 9.7%
Cross-breed median
9.7% of 31 rocky mountain horse reports involved a death outcome.
How to read this number
Read alongside breed popularity, veterinary access, and owner awareness, these shape how many events ever reach the FDA. The comparison line marks the cross-breed median death-coded share (about 4.8%) among breeds with 50 or more reports; values above it suggest higher reporting bias toward severe outcomes, not necessarily higher true mortality.
Average weight at time of report: 432.3 kg (953.2 lbs)
Top Reported Reactions
Fever 3
Behavioural disorder NOS 3
Injection site inflammation 3
Death by euthanasia 2
Lethargy (see also Central nervous system depression in 'Neurological') 2
Most Referenced Drugs
Pergolide Mesylate 10
Ceftiofur Crystalline Free Acid 6
Ivermectin + Praziquantel 2
Detomidine Hydrochloride 2
Dexamethasone 2
Outcome Breakdown
Outcome Unknown
11 (34.4%)
Recovered/Normal
10 (31.3%)
Ongoing
8 (25.0%)
Euthanized
2 (6.3%)
Died
1 (3.1%)
Gender Distribution
Male 18 (58.1%)
Female 10 (32.3%)
Unknown 2 (6.5%)
Mixed 1 (3.2%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2013 | 2 | |
| 2014 | 4 | |
| 2015 | 2 | |
| 2016 | 2 | |
| 2017 | 1 | |
| 2018 | 4 | |
| 2019 | 3 | |
| 2020 | 1 | |
| 2021 | 1 | |
| 2022 | 4 | |
| 2023 | 3 | |
| 2024 | 2 | |
| 2025 | 2 | |
Rocky Mountain Horse Pet Health Insights
Rocky Mountain Horse accounts for 31 FDA adverse event reports, ranking #314 by volume among horse breeds, with 3 reports (9.7%) coded as a death outcome. Mean age at report: 14.8 years, average weight 432.3 kg (953.2 lbs).
Top reported signs: Fever (3), Behavioural disorder NOS (3), Injection site inflammation (3). Most-referenced drug: Pergolide Mesylate (10 reports), followed by Ceftiofur Crystalline Free Acid (6) and Ivermectin + Praziquantel (2).
Outcome coding on 32 status-recorded reports is dominated by Outcome Unknown (34.4%). Annual submissions ranged 2,013-2,025 across 13 years on file.
Horse Breeds With a Similar Report Volume
Frequently Asked Questions
How many FDA adverse event reports involve Rocky Mountain Horse? ▼
There are 31 adverse event reports involving Rocky Mountain Horse in the FDA database, with 3 reports involving death (9.7% death rate). Rocky Mountain Horse ranks #314 by report volume.
What are the most common adverse reactions reported for Rocky Mountain Horse? ▼
The most commonly reported adverse reactions for Rocky Mountain Horse are Fever (3 reports), Behavioural disorder NOS (3 reports), Injection site inflammation (3 reports), Death by euthanasia (2 reports), Lethargy (see also Central nervous system depression in 'Neurological') (2 reports).
What drugs are most frequently associated with Rocky Mountain Horse adverse events? ▼
The drugs most frequently referenced in Rocky Mountain Horse adverse event reports are Pergolide Mesylate (10 reports), Ceftiofur Crystalline Free Acid (6 reports), Ivermectin + Praziquantel (2 reports), Detomidine Hydrochloride (2 reports), Dexamethasone (2 reports).
What is the average age of Rocky Mountain Horse in adverse event reports? ▼
The average age of Rocky Mountain Horse at the time of adverse event reports is 14.8 years, with an average weight of 432.3 kg (953.2 lbs).
Does a high number of adverse event reports mean Rocky Mountain Horse is unhealthy? ▼
No. FDA adverse event reports are voluntarily submitted and do not prove causation. Popular breeds with more veterinary visits tend to have more reports. The data reflects reporting patterns, not actual incidence rates. Always consult a veterinarian for health decisions.
Where does this Rocky Mountain Horse safety data come from? ▼
All data comes from the FDA Center for Veterinary Medicine's adverse event reporting system. Pet owners, veterinarians, and manufacturers voluntarily submit reports about adverse events potentially linked to animal drugs and other products.
Compare a breed's report volume against how common the breed is before drawing conclusions. See our methodology for how death rate and rankings are computed.
Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. Breed figures are computed directly from 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.