Hypotension after Butorphanol in dogs

77 reports to the FDA describe hypotension in dogs given 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
81%Marked serious
32%Recovered
35%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
48 72%
1–2 days
5 7.5%
3–7 days
7 10%
1–4 weeks
2 3.0%
Over a month
5 7.5%

How the animals did

Recovered
25 32%
Still unwell when reported
18 23%
Died
14 18%
Euthanised
13 17%
Not known
7 9.1%

Problems reported at the same time

Age of the animals

Under 1 year
8
1–3 years
20
4–7 years
20
8–11 years
18
12+ years
8

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause hypotension 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).

Hypotension with similar medicines

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