Butorphanol Tartrate
2,096 adverse event reports submitted to the FDA
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
2,096
Total Reports
358
Deaths Reported
1710.0%
Death Rate
Active Ingredients
Butorphanol Tartrate
Administration Routes
UnknownIntramuscularIntravenousSubcutaneousOralParenteralOtherOphthalmicSubconjunctivalNasal
Species Affected
Dog 1,233
Cat 509
Unknown 212
Horse 107
Human 8
Other 4
Guinea Pig 3
Donkey 3
Alpaca 2
Rabbit 2
Most Affected Breeds
Unknown 242
Domestic Shorthair 241
Retriever - Labrador 140
Dog (unknown) 130
Cat (unknown) 68
Domestic (unspecified) 60
Crossbred Canine/dog 51
Shepherd Dog - German 47
Chihuahua 46
Terrier - Bull - American Pit 45
Most Reported Reactions
Death 223
Vomiting 221
Lack of efficacy - NOS 153
Anorexia 147
Bradycardia 147
Lethargy (see also Central nervous system depression in 'Neurological') 133
Diarrhoea 118
Cardiac arrest 114
Death by euthanasia 102
INEFFECTIVE, SEDATION 99
Seizure NOS 95
Tablets, Abnormal 85
Outcome Breakdown
Recovered/Normal
676 (39.6%)
Ongoing
430 (25.2%)
Died
261 (15.3%)
Outcome Unknown
234 (13.7%)
Euthanized
97 (5.7%)
Recovered with Sequela
8 (0.5%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.