Kidney problems after Vitamin B12 in cats

56 reports to the FDA describe kidney problems in cats given Vitamin B12. That is 15% of all reports for this medicine, compared with 4.5% across reports for all cat medicines, so it is reported unusually often with this medicine.

56Reports
73%Marked serious
0.0%Recovered
39%Died or euthanised
7 daysTypical onset
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How soon it started

Same day
6 14%
1–2 days
10 23%
3–7 days
8 18%
1–4 weeks
5 11%
Over a month
15 34%

How the animals did

Still unwell when reported
27 48%
Died
7 13%
Euthanised
15 27%
Not known
7 13%

Problems reported at the same time

28 50%
21 38%
15 27%
Hyperphosphataemia
15 27%

Age of the animals

Under 1 year
1
1–3 years
1
4–7 years
0
8–11 years
16
12+ years
38

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B12 cause kidney problems in cats?
56 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 7 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).

Kidney problems with similar medicines

All reported side effects of Vitamin B12 in cats · Medicines most reported with kidney problems