Butorphanol side effects in Quarter Horses

92 FDA reports involve Butorphanol in a Quarter Horse. These are the problems they describe.

Death
29 32%
Didn't work as expected
20 22%
Collapse
18 20%
Allergic reaction
14 15%
Wobbliness (ataxia)
14 15%
Breathing problems
13 14%
Pale mucous membrane
12 13%
Underdose
11 12%
Fever
7 7.6%
Injection site reaction
6 6.5%
Seizures
6 6.5%
Falling
5 5.4%

All reports for Butorphanol in horses