Loss of appetite after Vitamin B Complex in cats

29 reports to the FDA describe loss of appetite in cats given Vitamin B Complex. That is 53% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

29Reports
83%Marked serious
10%Recovered
38%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
4 14%
1–2 days
9 31%
3–7 days
6 21%
1–4 weeks
2 6.9%
Over a month
8 28%

How the animals did

Recovered
3 10%
Still unwell when reported
9 31%
Died
7 24%
Euthanised
4 14%
Not known
6 21%

Problems reported at the same time

Lethargy
14 48%
Death
11 38%
Vomiting
10 34%
Liver problems
10 34%
Weight loss
10 34%
Dehydration
9 31%
Kidney problems
7 24%
Behaviour change
6 21%

Age of the animals

Under 1 year
0
1–3 years
1
4–7 years
6
8–11 years
9
12+ years
13

About this medicine

Type: medicine.

Questions owners ask

Can Vitamin B Complex cause loss of appetite in cats?
29 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 3 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).

Loss of appetite with similar medicines

All reported side effects of Vitamin B Complex in cats · Medicines most reported with loss of appetite