Mass after Butorphanol in dogs

32 reports to the FDA describe mass in dogs given Butorphanol. That is 0.7% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

32Reports

47%Marked serious

16%Recovered

19%Died or euthanised

3 daysTypical onset

How soon it started

Same day

9 33%

1–2 days

4 15%

3–7 days

3 11%

1–4 weeks

3 11%

Over a month

8 30%

How the animals did

Recovered

5 16%

Still unwell when reported

4 13%

Euthanised

6 19%

Not known

17 53%

Problems reported at the same time

Didn't work as expected

16 50%

Loss of appetite

14 44%

Injection site reaction

14 44%

13 41%

12 38%

10 31%

6 19%

6 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 mass in dogs?: 32 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 3 days 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).

Mass with similar medicines

Mass after Diphenhydramine 29 reports · 0.6% of its reports
Mass after Atipamezole 20 reports · 0.8% of its reports
Mass after Famotidine 24 reports · 0.9% of its reports
Mass after Tigilanol Tiglate 42 reports · 2.1% of its reports

All reported side effects of Butorphanol in dogs · Medicines most reported with mass