Swelling after Butorphanol in dogs

630 reports to the FDA describe swelling in dogs given Butorphanol. That is 14% of all reports for this medicine, compared with 2.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

630Reports
52%Marked serious
24%Recovered
13%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
251 46%
1–2 days
105 19%
3–7 days
81 15%
1–4 weeks
67 12%
Over a month
37 6.8%

How the animals did

Recovered
152 24%
Recovered with lasting effects
1 0.2%
Still unwell when reported
153 24%
Died
46 7.3%
Euthanised
36 5.7%
Not known
242 38%

Problems reported at the same time

Age of the animals

Under 1 year
65
1–3 years
131
4–7 years
213
8–11 years
165
12+ years
45

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause swelling in dogs?
630 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 1 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).

Swelling with similar medicines

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