Niacinamide side effects in dogs

51 reports sent to the FDA between 2012 and 2026 involve Niacinamide in dogs. The most reported problems were lethargy, loss of appetite, liver problems. 61% were marked serious.

51Reports
61%Marked serious
0.0%Only medicine involved
22%Recovered
9.8%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

Lethargy
13 25%
Loss of appetite
11 22%
Liver problems
10 20%
Vomiting
10 20%
Diarrhea
9 18%
Kidney problems
7 14%
Skin rash or irritation
6 12%
Seizures
5 9.8%
Fever
5 9.8%
Breathing problems
4 7.8%
Panniculitis
4 7.8%
Leucocytosis
4 7.8%
Wobbliness (ataxia)
4 7.8%
Itching
3 5.9%
Excessive urination
3 5.9%

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 dog still getting fleas or heartworm), not about a side effect.

Didn't work as expected
7 14%
Didn't prevent heartworm
1 2.0%
Didn't stop fleas
1 2.0%

How soon problems started

Same day
4 18%
1–2 days
1 4.5%
3–7 days
1 4.5%
1–4 weeks
5 23%
Over a month
11 50%

Time from the first dose to the first sign, where both dates were reported (22 reports).

How the animals did

Recovered
6 12%
Recovered with lasting effects
5 9.8%
Still unwell when reported
27 53%
Died
3 5.9%
Euthanised
2 3.9%
Not known
8 16%

Breeds named most often

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

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