Blood problems after Vitamin B Complex in dogs

The FDA has received 21 reports of blood problems in dogs after Vitamin B Complex. That is 27% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported unusually often with this medicine.

21Reports
81%Marked serious
9.5%Recovered
62%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
2 11%
1–2 days
6 32%
3–7 days
5 26%
1–4 weeks
4 21%
Over a month
2 11%

How the animals did

Recovered
2 9.5%
Still unwell when reported
4 19%
Died
6 29%
Euthanised
7 33%
Not known
2 9.5%

Problems reported at the same time

13 62%
11 52%
Kidney problems
11 52%
Leucocytosis
10 48%
Lethargy
7 33%
Pale mucous membrane
7 33%

Age of the animals

Under 1 year
6
1–3 years
3
4–7 years
2
8–11 years
9
12+ years
1

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B Complex cause blood problems in dogs?
21 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).

Blood problems with similar medicines

All reported side effects of Vitamin B Complex in dogs · Medicines most reported with blood problems