Didn't work as expected after Butorphanol in cats

The FDA has received 220 reports of didn't work as expected in cats after Butorphanol. That is 9.8% of all reports for this medicine, compared with 8.7% across reports for all cat medicines.

220Reports

55%Marked serious

54%Recovered

14%Died or euthanised

Same dayTypical onset

How soon it started

Same day

148 83%

1–2 days

9 5.0%

3–7 days

10 5.6%

1–4 weeks

8 4.5%

Over a month

4 2.2%

How the animals did

Recovered

119 54%

Still unwell when reported

38 17%

Died

17 7.7%

Euthanised

14 6.4%

Not known

32 15%

Problems reported at the same time

Death

22 10%

Loss of appetite

15 6.8%

Underdose

14 6.4%

Drug administration error

13 5.9%

10 4.5%

10 4.5%

8 3.6%

8 3.6%

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 didn't work as expected in cats?: 220 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).

Didn't work as expected with similar medicines

Didn't work as expected after Ketamine 586 reports · 18% of its reports
Didn't work as expected after Isoflurane 144 reports · 7.1% of its reports
Didn't work as expected after Tiletamine + Zolazepam 265 reports · 16% of its reports
Didn't work as expected after Methylprednisolone 227 reports · 14% of its reports
Didn't work as expected after Propofol 81 reports · 6.9% of its reports
Didn't work as expected after Atipamezole 120 reports · 12% of its reports
Didn't work as expected after Midazolam 31 reports · 4.1% of its reports
Didn't work as expected after Florfenicol + Mometasone + Terbinafine 42 reports · 6.1% of its reports
Didn't work as expected after Orbifloxacin 76 reports · 11% of its reports
Didn't work as expected after Molidustat 194 reports · 32% of its reports

All reported side effects of Butorphanol in cats · Medicines most reported with didn't work as expected