Death after Butorphanol in dogs

718 reports to the FDA describe death in dogs given Butorphanol. That is 16% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

718Reports
83%Marked serious
0.0%Recovered
100%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
309 56%
1–2 days
73 13%
3–7 days
58 11%
1–4 weeks
56 10%
Over a month
52 9.5%

How the animals did

Died
503 70%
Euthanised
212 30%
Not known
3 0.4%

Problems reported at the same time

Age of the animals

Under 1 year
95
1–3 years
124
4–7 years
183
8–11 years
187
12+ years
97

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause death in dogs?
718 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).

Death with similar medicines

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