Pale mucous membrane after Butorphanol in cats

48 reports to the FDA describe pale mucous membrane in cats given Butorphanol. That is 2.1% of all reports for this medicine, compared with 0.6% across reports for all cat medicines, so it is reported unusually often with this medicine.

48Reports
63%Marked serious
29%Recovered
38%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
26 65%
1–2 days
5 13%
3–7 days
4 10%
1–4 weeks
3 7.5%
Over a month
2 5.0%

How the animals did

Recovered
14 29%
Still unwell when reported
12 25%
Died
14 29%
Euthanised
4 8.3%
Not known
4 8.3%

Problems reported at the same time

Age of the animals

Under 1 year
13
1–3 years
13
4–7 years
7
8–11 years
6
12+ years
7

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause pale mucous membrane in cats?
48 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).

Pale mucous membrane with similar medicines

All reported side effects of Butorphanol in cats · Medicines most reported with pale mucous membrane