Sedation prolonged after Butorphanol in dogs

The FDA has received 136 reports of sedation prolonged in dogs after Butorphanol. That is 3.1% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

136Reports
48%Marked serious
50%Recovered
8.1%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
88 85%
1–2 days
5 4.8%
3–7 days
3 2.9%
1–4 weeks
4 3.8%
Over a month
4 3.8%

How the animals did

Recovered
68 50%
Still unwell when reported
32 24%
Died
7 5.1%
Euthanised
4 2.9%
Not known
25 18%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
23
4–7 years
40
8–11 years
28
12+ years
13

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause sedation prolonged in dogs?
136 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).

Sedation prolonged with similar medicines

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