Blood in stool after Butorphanol in dogs

62 reports to the FDA describe blood in stool in dogs given Butorphanol. That is 1.4% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

62Reports
71%Marked serious
15%Recovered
34%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
14 27%
1–2 days
11 21%
3–7 days
5 9.6%
1–4 weeks
13 25%
Over a month
9 17%

How the animals did

Recovered
9 15%
Still unwell when reported
13 21%
Died
9 15%
Euthanised
12 19%
Not known
19 31%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
16
4–7 years
25
8–11 years
15
12+ years
4

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause blood in stool in dogs?
62 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 4 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 stool with similar medicines

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