Unable to stand after Butorphanol in dogs

The FDA has received 38 reports of unable to stand in dogs after Butorphanol. That is 0.9% of all reports for this medicine, compared with 0.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

38Reports
89%Marked serious
18%Recovered
37%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
16 47%
1–2 days
5 15%
3–7 days
3 8.8%
1–4 weeks
4 12%
Over a month
6 18%

How the animals did

Recovered
7 18%
Still unwell when reported
11 29%
Died
6 16%
Euthanised
8 21%
Not known
6 16%

Problems reported at the same time

Loss of appetite
17 45%
Lethargy
15 39%
Death
14 37%
Vomiting
12 32%
Breathing problems
9 24%
Didn't work as expected
7 18%
Sedation
6 16%
Eye or vision problems
6 16%

Age of the animals

Under 1 year
3
1–3 years
10
4–7 years
6
8–11 years
8
12+ years
9

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause unable to stand in dogs?
38 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.
How soon after a dose was it reported?
In half of the reports with dates, it started within 1 day of the first dose.
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).

Unable to stand with similar medicines

All reported side effects of Butorphanol in dogs · Medicines most reported with unable to stand