Itching after Butorphanol in cats

The FDA has received 84 reports of itching in cats after Butorphanol. That is 3.7% of all reports for this medicine, compared with 8.9% across reports for all cat medicines, so it is reported less often than average with this medicine.

84Reports
43%Marked serious
35%Recovered
7.1%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
42 57%
1–2 days
12 16%
3–7 days
8 11%
1–4 weeks
10 14%
Over a month
2 2.7%

How the animals did

Recovered
28 33%
Recovered with lasting effects
1 1.2%
Still unwell when reported
37 44%
Died
3 3.6%
Euthanised
3 3.6%
Not known
12 14%

Problems reported at the same time

Age of the animals

Under 1 year
25
1–3 years
12
4–7 years
10
8–11 years
16
12+ years
20

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause itching in cats?
84 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).

Itching with similar medicines

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