Vomiting after Vitamin B12 in dogs

The FDA has received 122 reports of vomiting in dogs after Vitamin B12. That is 32% of all reports for this medicine, compared with 28% across reports for all dog medicines.

122Reports
67%Marked serious
25%Recovered
30%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
23 23%
1–2 days
21 21%
3–7 days
8 8.1%
1–4 weeks
20 20%
Over a month
27 27%

How the animals did

Recovered
26 21%
Recovered with lasting effects
4 3.3%
Still unwell when reported
40 33%
Died
14 11%
Euthanised
23 19%
Not known
15 12%

Problems reported at the same time

Age of the animals

Under 1 year
14
1–3 years
23
4–7 years
31
8–11 years
33
12+ years
21

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B12 cause vomiting in dogs?
122 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 4 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).

Vomiting with similar medicines

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