Butorphanol side effects in Horses

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

Didn't work as expected
26 50%
Underdose
5 9.6%
Sedation prolonged
4 7.7%
Allergic reaction
4 7.7%
Restlessness or agitation
3 5.8%
Wobbliness (ataxia)
3 5.8%
Death
3 5.8%
Administration error
2 3.8%
Behaviour change
2 3.8%
Recumbency
2 3.8%
Seizures
2 3.8%
Collapse
2 3.8%

All reports for Butorphanol in horses