Blood in vomit after Butorphanol in dogs

58 reports to the FDA describe blood in vomit in dogs given Butorphanol. That is 1.3% of all reports for this medicine, compared with 0.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

58Reports
67%Marked serious
17%Recovered
24%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
20 37%
1–2 days
15 28%
3–7 days
7 13%
1–4 weeks
7 13%
Over a month
5 9.3%

How the animals did

Recovered
10 17%
Still unwell when reported
22 38%
Died
10 17%
Euthanised
4 6.9%
Not known
12 21%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
18
4–7 years
17
8–11 years
12
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause blood in vomit in dogs?
58 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).

Blood in vomit with similar medicines

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