Vocalising after Vitamin B12 in cats

28 reports to the FDA describe vocalising in cats given Vitamin B12. That is 7.3% of all reports for this medicine, compared with 3.1% across reports for all cat medicines, so it is reported unusually often with this medicine.

28Reports
75%Marked serious
18%Recovered
46%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
12 48%
1–2 days
5 20%
3–7 days
3 12%
1–4 weeks
1 4.0%
Over a month
4 16%

How the animals did

Recovered
5 18%
Still unwell when reported
7 25%
Died
8 29%
Euthanised
5 18%
Not known
3 11%

Problems reported at the same time

13 46%
12 43%
Hypothermia
5 18%
Restlessness or agitation
5 18%

Age of the animals

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

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B12 cause vocalising in cats?
28 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 1 day 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).

Vocalising with similar medicines

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