Butorphanol side effects in horses
299 reports sent to the FDA between 1995 and 2026 involve Butorphanol in horses. The most reported problems were allergic reaction, underdose, collapse. 53% were marked serious, and where it was recorded, signs eased after stopping the medicine in 100% of cases.
299Reports
53%Marked serious
24%Only medicine involved
50%Recovered
21%Died or euthanised
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About this medicine
Type: medicine.
Most reported side effects
Share = percentage of this medicine's reports that mention the problem. One report can list several problems.
Reports that it didn't work
Some reports are about the medicine not working (for example a horse still getting fleas or heartworm), not about a side effect.
How soon problems started
Time from the first dose to the first sign, where both dates were reported (198 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Quarter Horse 92 reports
- Horse 52 reports
- Thoroughbred 32 reports
- Warmblood 17 reports
- Paint 10 reports
- Horse (other) 9 reports
- Arab 7 reports
- American Saddlebred 6 reports
- Miniature 5 reports
- Morgan 4 reports
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