Vitamin B12
661 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.
661
Total Reports
153
Deaths Reported
2310.0%
Death Rate
Active Ingredients
Vitamin B12
Administration Routes
UnknownSubcutaneousParenteralOralIntravenousOtherIntramuscularCutaneousOphthalmicIntraocular
Species Affected
Cat 322
Dog 320
Human 13
Pig 3
Cattle 2
Horse 1
Most Affected Breeds
Domestic Shorthair 184
Retriever - Labrador 42
Domestic Mediumhair 34
Shepherd Dog - German 28
Domestic Longhair 25
Chihuahua 21
Unknown 13
Siamese 13
Cat (unknown) 12
Retriever - Golden 11
Most Reported Reactions
Vomiting 134
Lethargy (see also Central nervous system depression in 'Neurological') 103
Diarrhoea 101
Weight loss 96
Anorexia 88
Death by euthanasia 86
Other abnormal test result NOS 73
Not eating 69
Lethargy (see also Central nervous system depression in Neurological) 67
Lack of efficacy - NOS 66
Death 60
Ataxia 57
Outcome Breakdown
Ongoing
259 (38.7%)
Outcome Unknown
142 (21.2%)
Recovered/Normal
105 (15.7%)
Euthanized
87 (13.0%)
Died
68 (10.2%)
Recovered with Sequela
8 (1.2%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.