Weight loss after Butorphanol in dogs

128 reports to the FDA describe weight loss in dogs given Butorphanol. That is 2.9% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

128Reports
72%Marked serious
15%Recovered
22%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
31 29%
1–2 days
20 19%
3–7 days
12 11%
1–4 weeks
29 27%
Over a month
15 14%

How the animals did

Recovered
16 13%
Recovered with lasting effects
3 2.3%
Still unwell when reported
40 31%
Died
10 7.8%
Euthanised
18 14%
Not known
41 32%

Problems reported at the same time

Age of the animals

Under 1 year
6
1–3 years
22
4–7 years
52
8–11 years
36
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause weight loss in dogs?
128 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 3 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 loss with similar medicines

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