Polypnoea after Butorphanol in dogs

The FDA has received 22 reports of polypnoea in dogs after Butorphanol. That is 0.5% of all reports for this medicine, compared with 0.5% across reports for all dog medicines.

22Reports
4.5%Marked serious
4.5%Recovered
23%Died or euthanised
–Typical onset
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How the animals did

Recovered
1 4.5%
Died
5 23%
Not known
16 73%

Problems reported at the same time

10 45%
5 23%
4 18%
Apprehension
3 14%

Age of the animals

Under 1 year
1
1–3 years
3
4–7 years
2
8–11 years
7
12+ years
2

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause polypnoea in dogs?
22 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Polypnoea with similar medicines

All reported side effects of Butorphanol in dogs · Medicines most reported with polypnoea