Recovery prolonged after Butorphanol in cats

95 reports to the FDA describe recovery prolonged in cats given Butorphanol. That is 4.2% of all reports for this medicine, compared with 0.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

95Reports
40%Marked serious
28%Recovered
14%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
53 93%
1–2 days
3 5.3%
3–7 days
1 1.8%
1–4 weeks
0 0.0%
Over a month
0 0.0%

How the animals did

Recovered
27 28%
Still unwell when reported
18 19%
Died
6 6.3%
Euthanised
7 7.4%
Not known
37 39%

Problems reported at the same time

Age of the animals

Under 1 year
19
1–3 years
13
4–7 years
16
8–11 years
19
12+ years
16

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause recovery prolonged in cats?
95 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 the same 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).

Recovery prolonged with similar medicines

All reported side effects of Butorphanol in cats · Medicines most reported with recovery prolonged