Loose stool after Butorphanol in dogs

The FDA has received 48 reports of loose stool in dogs after Butorphanol. That is 1.1% of all reports for this medicine, compared with 0.9% across reports for all dog medicines.

48Reports
58%Marked serious
19%Recovered
27%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
15 39%
1–2 days
6 16%
3–7 days
7 18%
1–4 weeks
7 18%
Over a month
3 7.9%

How the animals did

Recovered
9 19%
Still unwell when reported
15 31%
Died
4 8.3%
Euthanised
9 19%
Not known
11 23%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
11
4–7 years
18
8–11 years
11
12+ years
2

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause loose stool in dogs?
48 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 2 days 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).

Loose stool with similar medicines

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