Butorphanol side effects in dogs
4,441 reports sent to the FDA between 1995 and 2026 involve Butorphanol in dogs. The most reported problems were vomiting, loss of appetite, lethargy. 55% were marked serious, and where it was recorded, signs eased after stopping the medicine in 63% of cases.
4,441Reports
55%Marked serious
15%Only medicine involved
36%Recovered
17%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 dog 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 (3,508 reports).
How the animals did
Breeds named most often
Popular breeds appear more often because there are more of them.
- Labrador Retriever 371 reports
- Chihuahua 132 reports
- German Shepherd Dog 131 reports
- Bull - American Pit Terrier 101 reports
- Golden Retriever 98 reports
- Yorkshire Terrier 86 reports
- Shih Tzu 77 reports
- Boxer (german Boxer) 75 reports
- French Bulldog 74 reports
- Australian Shepherd Dog 60 reports
Other medicines for dogs
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