Hypothermia after Butorphanol in dogs

The FDA has received 77 reports of hypothermia in dogs after Butorphanol. That is 1.7% of all reports for this medicine, compared with 0.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

77Reports
64%Marked serious
22%Recovered
19%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
46 72%
1–2 days
15 23%
3–7 days
1 1.6%
1–4 weeks
0 0.0%
Over a month
2 3.1%

How the animals did

Recovered
17 22%
Still unwell when reported
27 35%
Died
12 16%
Euthanised
3 3.9%
Not known
18 23%

Problems reported at the same time

Age of the animals

Under 1 year
12
1–3 years
22
4–7 years
23
8–11 years
12
12+ years
4

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause hypothermia in dogs?
77 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 the same 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).

Hypothermia with similar medicines

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