Third eyelid protrusion after Butorphanol in cats

21 reports to the FDA describe third eyelid protrusion in cats given Butorphanol. That is 0.9% of all reports for this medicine, compared with 0.3% across reports for all cat medicines, so it is reported unusually often with this medicine.

21Reports

67%Marked serious

48%Recovered

4.8%Died or euthanised

1 daysTypical onset

How soon it started

Same day

8 42%

1–2 days

5 26%

3–7 days

0 0.0%

1–4 weeks

6 32%

Over a month

0 0.0%

How the animals did

Recovered

8 38%

Recovered with lasting effects

2 9.5%

Still unwell when reported

6 29%

Euthanised

1 4.8%

Not known

4 19%

Problems reported at the same time

Loss of appetite

13 62%

Lethargy

6 29%

Vocalising

6 29%

Reluctant to move

5 24%

Anisocoria

4 19%

Wobbliness (ataxia)

4 19%

Blood problems

4 19%

Eosinopenia

4 19%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Butorphanol cause third eyelid protrusion in cats?: 21 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 1 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).

Third eyelid protrusion with similar medicines

Third eyelid protrusion after Isoflurane 24 reports · 1.2% of its reports
Third eyelid protrusion after Florfenicol + Mometasone + Terbinafine 110 reports · 16% of its reports
Third eyelid protrusion after Betamethasone + Florfenicol + Terbinafine 56 reports · 22% of its reports

All reported side effects of Butorphanol in cats · Medicines most reported with third eyelid protrusion