Acetaminophen side effects in dogs

58 reports sent to the FDA between 2011 and 2026 involve Acetaminophen in dogs. The most reported problems were lethargy, loss of appetite, liver problems. 62% were marked serious.

58Reports
62%Marked serious
0.0%Only medicine involved
16%Recovered
28%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

20 34%
Liver problems
13 22%
Abnormal radiograph finding
12 21%
Weakness
11 19%
Blood problems
10 17%
Kidney problems
9 16%
Wobbliness (ataxia)
9 16%
Swelling
8 14%
Vomiting
7 12%
Monocytosis
7 12%
Breathing problems
6 10%
Eosinopenia
6 10%
Behaviour change
5 8.6%
Intestinal perforation
5 8.6%

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
12 21%
Didn't stop fleas
2 3.4%

How soon problems started

Same day
12 26%
1–2 days
7 15%
3–7 days
5 11%
1–4 weeks
7 15%
Over a month
15 33%

Time from the first dose to the first sign, where both dates were reported (46 reports).

How the animals did

Recovered
9 16%
Still unwell when reported
17 29%
Died
4 6.9%
Euthanised
12 21%
Not known
16 28%

Breeds named most often

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

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