Fenbendazole
2,684 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.
2,684
Total Reports
297
Deaths Reported
1110.0%
Death Rate
Active Ingredients
Fenbendazole
Administration Routes
OralUnknownTopicalSubcutaneousOphthalmicRespiratory (Inhalation)OtherIntrauterineAuricular (Otic)Intraocular
Species Affected
Dog 2,188
Unknown 143
Cattle 141
Cat 113
Horse 31
Goat 21
Human 15
Pig 8
Turkey 4
Alpaca 3
Most Affected Breeds
Crossbred Canine/dog 278
Unknown 166
Retriever - Labrador 165
Greyhound 127
Dog (unknown) 107
Pit Bull 101
Chihuahua 95
Shepherd Dog - German 83
Retriever - Golden 81
Domestic Shorthair 77
Most Reported Reactions
Vomiting 659
Diarrhoea 372
Lack of efficacy (endoparasite) - hookworm 272
Anorexia 259
Depression 229
Death 221
Other abnormal test result NOS 132
INEFFECTIVE, HOOKS 132
Lethargy (see also Central nervous system depression in 'Neurological') 130
Lack of efficacy (endoparasite) - tapeworm 129
Emesis 83
Lack of efficacy (endoparasite) - roundworm NOS 77
Outcome Breakdown
Outcome Unknown
671 (40.1%)
Recovered/Normal
365 (21.8%)
Ongoing
328 (19.6%)
Died
259 (15.5%)
Euthanized
42 (2.5%)
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.