Disorientation after Butorphanol in cats

The FDA has received 49 reports of disorientation in cats after Butorphanol. That is 2.2% of all reports for this medicine, compared with 1.0% across reports for all cat medicines, so it is reported unusually often with this medicine.

49Reports
43%Marked serious
24%Recovered
24%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
20 69%
1–2 days
8 28%
3–7 days
0 0.0%
1–4 weeks
0 0.0%
Over a month
1 3.4%

How the animals did

Recovered
12 24%
Still unwell when reported
15 31%
Died
10 20%
Euthanised
2 4.1%
Not known
10 20%

Problems reported at the same time

Age of the animals

Under 1 year
13
1–3 years
9
4–7 years
8
8–11 years
7
12+ years
9

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause disorientation in cats?
49 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).

Disorientation with similar medicines

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