Vitamin B Complex side effects in cats

55 reports sent to the FDA between 2012 and 2026 involve Vitamin B Complex in cats. The most reported problems were loss of appetite, lethargy, vomiting. 67% were marked serious.

55Reports
67%Marked serious
0.0%Only medicine involved
16%Recovered
33%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Lethargy
19 35%
Vomiting
18 33%
Weight loss
14 25%
Dehydration
12 22%
Kidney problems
11 20%
Liver problems
11 20%
Behaviour change
9 16%
Drooling
8 15%
Wobbliness (ataxia)
8 15%
Diarrhea
7 13%
Hyperglycaemia
7 13%
Hypokalaemia
6 11%
Vocalising
5 9.1%
Breathing problems
5 9.1%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a cat still getting fleas or heartworm), not about a side effect.

Didn't work as expected
6 11%
Didn't stop fleas
3 5.5%

How soon problems started

Same day
8 16%
1–2 days
14 27%
3–7 days
8 16%
1–4 weeks
8 16%
Over a month
13 25%

Time from the first dose to the first sign, where both dates were reported (51 reports).

How the animals did

Recovered
9 16%
Still unwell when reported
12 22%
Died
10 18%
Euthanised
8 15%
Not known
16 29%

Breeds named most often

Popular breeds appear more often because there are more of them.

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