Total Reports
2,403
FDA CVM filings
Horse /
FDA CVM · 2025 release 2,403 reports on file
Quarter Horse - FDA Adverse Event Profile
Adverse-event records for Quarter Horse (Horse) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Quarter Horse ranks #74 by report volume among horse breeds - 273 of 2,403 reports (11.4%) recorded a death outcome.
- #74
- most-reported horse breed
- 11.4%
- death-coded report share
- 265
- Lack of efficacy - NOS - top reaction
- 12.7 yr
- average age at report
Higher volume usually means a more popular breed, not a riskier one, compare against how common the breed is.
Deaths Reported
273
of 2,403 reports
Death Rate
11.4%
death-coded share
Avg Age at Report
12.7 yr
437.2 kg avg weight
Death-Coded Outcome Share
Quarter Horse death-coded reports 11.4%
Cross-breed median
11.4% of 2,403 quarter 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: 437.2 kg (964.0 lbs)
Top Reported Reactions
Lack of efficacy - NOS 265
Injection site swelling 235
Colic 178
INEFFECTIVE, GASTRIC ULCER(S) 137
Death 136
Anorexia 122
Death by euthanasia 111
Fever 107
Injection site pain 104
Ataxia 103
Diarrhoea 103
Behavioural disorder NOS 100
Lethargy (see also Central nervous system depression in 'Neurological') 99
Depression 85
Application site swelling 79
Most Referenced Drugs
Omeprazole 285
Ceftiofur Crystalline Free Acid 276
Pergolide Mesylate 182
Detomidine Hydrochloride 151
Clodronate Disodium 139
Ivermectin(1.55%)/Praziquantel(7.75%) Paste 135
Firocoxib 93
Ivermectin + Praziquantel 89
Polysulfated Glycosaminoglycan 76
Ketamine Hydrochloride 61
Sucralfate 59
Ceftiofur 56
Ivermectin 53
Flunixin Meglumine 52
Hyaluronate Sodium 51
Outcome Breakdown
Recovered/Normal
861 (39.5%)
Outcome Unknown
640 (29.3%)
Ongoing
386 (17.7%)
Died
174 (8.0%)
Euthanized
102 (4.7%)
Recovered with Sequela
19 (0.9%)
Gender Distribution
Male 1,340 (55.8%)
Female 893 (37.2%)
Mixed 96 (4.0%)
Unknown 74 (3.1%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 124 | |
| 2011 | 118 | |
| 2012 | 145 | |
| 2013 | 149 | |
| 2014 | 118 | |
| 2015 | 165 | |
| 2016 | 155 | |
| 2017 | 163 | |
| 2018 | 141 | |
| 2019 | 136 | |
| 2020 | 161 | |
| 2021 | 159 | |
| 2022 | 171 | |
| 2023 | 152 | |
| 2024 | 202 | |
| 2025 | 144 | |
Quarter Horse Pet Health Insights
Quarter Horse accounts for 2,403 FDA adverse event reports, ranking #74 by volume among horse breeds, with 273 reports (11.4%) coded as a death outcome. Mean age at report: 12.7 years, average weight 437.2 kg (964.0 lbs).
Top reported signs: Lack of efficacy - NOS (265), Injection site swelling (235), Colic (178). Most-referenced drug: Omeprazole (285 reports), followed by Ceftiofur Crystalline Free Acid (276) and Pergolide Mesylate (182).
Outcome coding on 2,182 status-recorded reports is dominated by Recovered/Normal (39.5%). Annual submissions ranged 2,010-2,025 across 16 years on file.
Horse Breeds With a Similar Report Volume
Frequently Asked Questions
How many FDA adverse event reports involve Quarter Horse? ▼
There are 2,403 adverse event reports involving Quarter Horse in the FDA database, with 273 reports involving death (11.4% death rate). Quarter Horse ranks #74 by report volume.
What are the most common adverse reactions reported for Quarter Horse? ▼
The most commonly reported adverse reactions for Quarter Horse are Lack of efficacy - NOS (265 reports), Injection site swelling (235 reports), Colic (178 reports), INEFFECTIVE, GASTRIC ULCER(S) (137 reports), Death (136 reports).
What drugs are most frequently associated with Quarter Horse adverse events? ▼
The drugs most frequently referenced in Quarter Horse adverse event reports are Omeprazole (285 reports), Ceftiofur Crystalline Free Acid (276 reports), Pergolide Mesylate (182 reports), Detomidine Hydrochloride (151 reports), Clodronate Disodium (139 reports).
What is the average age of Quarter Horse in adverse event reports? ▼
The average age of Quarter Horse at the time of adverse event reports is 12.7 years, with an average weight of 437.2 kg (964.0 lbs).
Does a high number of adverse event reports mean Quarter 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 Quarter 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.