Weight gain after Butorphanol in dogs

22 reports to the FDA describe weight gain in dogs given Butorphanol. That is 0.5% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

22Reports
45%Marked serious
0.0%Recovered
23%Died or euthanised
27 daysTypical onset
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How soon it started

Same day
2 11%
1–2 days
4 22%
3–7 days
1 5.6%
1–4 weeks
4 22%
Over a month
7 39%

How the animals did

Still unwell when reported
4 18%
Died
3 14%
Euthanised
2 9.1%
Not known
13 59%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
6
4–7 years
9
8–11 years
4
12+ years
2

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause weight gain in dogs?
22 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 27 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).

Weight gain with similar medicines

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