Death after Vitamin B12 in dogs

The FDA has received 90 reports of death in dogs after Vitamin B12. That is 24% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported unusually often with this medicine.

90Reports
100%Marked serious
0.0%Recovered
100%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
17 23%
1–2 days
13 18%
3–7 days
9 12%
1–4 weeks
20 27%
Over a month
15 20%

How the animals did

Died
38 42%
Euthanised
52 58%

Problems reported at the same time

Age of the animals

Under 1 year
12
1–3 years
8
4–7 years
12
8–11 years
31
12+ years
27

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B12 cause death in dogs?
90 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?
In half of the reports with dates, it started within 6 days of the first dose.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Death with similar medicines

All reported side effects of Vitamin B12 in dogs · Medicines most reported with death